O TRO_ BILT
Operator's Manual
Rear-tine Tiller Models
630Cn Tuffy_
634Fm BroncoTM
634Bm Super BroncoTM
Model 634B Shown
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
WARNING: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting applicable
local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of
California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws.
Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or
contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.
TROY-BILT LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
PRINTEDIN U.S.A. FORM NO. 770-10594B
11/5/02
TABLEOFCONTENTS
Content Page
CallingCustomerSupport.......................................................................................................2
Safety......................................................................................................................................3
Assembly................................................................................................................................6
Freaturesand Controls............................................................................................................10
Operation................................................................................................................................12
Maintenance...........................................................................................................................17
Off-SeasonStorage.................................................................................................................21
Troubleshooting......................................................................................................................22
Parts List................................................................................................................................23
WarrantyInformation..............................................................................................................BackCover
FINDINGMODELNUMBER
This Operator'sManualisan important partof your newRear-tineTiller. It will helpyou assemble,prepareandmaintain the unitfor
best performance. Pleasereadand understandwhat it says.
Beforeyoustartassemblingyournewequipment,pleaselocatethe modelplateon the equipmentand copythe
information from it inthespace providedbelow.This information isvery importantif you needhelpfrom ourCustomer
Support Departmentor an authorizeddealer.
You canlocatethe model numberby lookingon the rearsurfaceof thetine shield.A sample model plateisexplainedbelow.For
future reference,pleasecopy the modelnumberandtheserial numberof theequipment inthe spacebelow.
O TRII_BILT • _."__-_ _. _
www.troybilt.com CLEVELAND,OH44136
330-558-7220
• 866-840-648_
Copythe modelnumberhere:
Copythe serial numberhere:
ENGINEINFORMATION
Theengine manufacturer is responsiblefor all engine-relatedissueswith regardto performance,power-rating, specifications,
warrantyand service. Pleasereferto the enginemanufacturer's Owner's/Operator'sManualpackedseparatelywith your unitfor more
information.
CALLINGCUSTOMERSUPPORT
If you havedifficulty assemblingthis product or haveanyquestionsregarding thecontrols, operationor maintenanceofthis unit,
pleasecallthe CustomerSupport Department.
Call1- (330) 558-7220 or1- (866) 840-6483 to reacha Customer Support representative.Pleasehaveyour unit's
model numberandserial number readywhenyou call. Seeprevioussectionto locatethis information. You will be
askedto enterthe serial
SECTION1: SAFETY
Thismachinemeetsvoluntarysafetystan-
dardB71.8-1996, whichissponsoredbythe
OutdoorPowerEquipmentInstitute,Inc.,
andis publishedbythe AmericanNational
StandardsInstitute.
WARNING
The engine exhaust from this productcontains
chemicals known to the State ofCalifornia to
cause cancer, birth defects or other reproduc-
SafetyAlertSymbol
This is a safety alert symbol. It is used
in this manual and on the unit to alert
you to potential hazards. When you
see this symbol, read and obey the
message that follows it. Failure to obey
safety messages could result in
persona I injury or property damage.
ForwardClutchO_
ReverseClutchControl
(Models634F/634B)
DepthRegulator
TineHoodFlap
/
(SRT)
DrivePin
Figure1-1: Tillerfeaturesandcontrols(5.5HPModelshown).Seeseparate
EngineOwner'sManualtoidentifyenginecontrols.
Training
_ _ 1., Carefullyreadthis Own-
"_,_/,_ ers Manual.the separate
EngineOwner'sManual
andany other literature you may receive.
Bethoroughly familiar with the controls
andthe proper use ofthe tiller and its en-
gine.Know howto stop the unitand disen-
gagethe controls quickly.
2. Neverallow childrento operatethetiller.
Neverallow adults to operatethe tiller
without proper instruction.
3. Keepthearea of operationclear of all
persons,particularly children and pets
4. Keepin mindthat theoperatoror useris
responsiblefor accidents or hazardsoc-
curring to other people,their property,and
themselves.
Preparation
1.Thoroughly inspectthe area wherethe
tiller isto be usedand removeall foreign
objects.
2. Be sure all tiller controls are released
andboth wheelsare in theWheelDrive po-
sition beforestarting the engine.
3. Donot operatethetiller without wearing
adequateoutergarments. Avoid loosegar-
ments or jewelry that could getcaught in
moving parts.
4. Do not operatethe tiller when barefoot
or wearingsandals,sneakers,or hghtfoot-
wear.Wearprotective footwear that wi
improve footing on slippery surfaces,
e. Replaceall fuel tank and container
caps securely.
f. If fuel is spilled, do not attempt to
start the engine,but move the ma-
chineawayfrom the areaofsp_llage
and avoidcreating any source of ig-
qition until fuel vapors havedissi-
pated.
5. Donottill near underground electricca- 7. Nevermakeadjustmentswhenengine_s
bles. telephonelines, pipes or hoses.If in running (unlessrecommended oy manu-
doubt contact your telephoneor utility facturer).
company.
6. Warning: Handlefuel with care:it is Operation
highly flammableand its vaporsare explo-
sive.Takethe following precautions:
n. Storefuel in containersspecifically
designedfor this purpose.
I]. Thegascapshallneverberemovedor
fueladdedwhiletheengineisrunning.
Allow theengineto coolfor several
minutesbeforeaddingfuel.
_. Keepmatches,cigarettes,cigars.
ptpes,openflames and sparksaway
from the fueltank and fuel container.
d. Fillfuel tank outdoorswith extreme
care.Neverfill fueltank indoors.Use
a funnel or spou[ to preventspillage.
1. Do not put hands or feet near or under
rotating parts
2. Exerciseextremecaution when on or
crossing gravel drives,walks, or roads.
Stayalertfor hidden hazardsor traffic. Do
not carry passengers.
3.After striking a foreign object, stop the
engine,removethe wire from the spark
plug wire and prevent itfrom touching the
spark plug. Thoroughly inspectthe ma-
chinefor any damageand repair the dam-
agebefore restarting and operatingthe
machine.
4. Exercisecautionto avoid slippingor fall- If indoubtaboutthetilling conditions,al- 24. Donot touch engineparts which may
ing.
5. If the unit should start to vibrate aonor-
really,stop the enQne.disconnect the
spark plug wire and prevent itfrom touch-
ing the spark plug,and checkimmediately
for the cause. Vibration is generallya
warning of trouble.
B.Stopthe enQhe,disconnectthe spark
plugwire and prevent itfrom touching the
spark plug, whenever you leavethe oper-
atingposition, beforeuncloggingthetrees.
or whenmaking any repairs, adjustments
or inspections.
7. Takeall possible precautionswhenleav-
ing the machine unattended. Stopthe en-
gine. Disconnectthe spark plugwire and
move itawayfrom thespark plug. Besure
that both wheelsare inthe WheelDrive po-
sition.
8. Beforecleaning, repairing, orinspect-
ing, stop the engine and makecertain all
mowng parts havestopped. Disconnect
thespark plugwire and preventitfrom
touching the spark plugto preventacci-
dentalstarting.
9. Theflapon thetine hood must bedown
when operatingthetiller.
tO. Neverusethetiller unless proper
guards, plates,or other safetyprotective
devicesare in place.
11. Donot run the engine man enclosed
area. Engineexhaustcontains caroon
monoxide gas. a deadlypoison that is
odorless, colorless, and tasteless.
12. Keepchildren and petsaway.
13.Neveroperatethetiller underengine
powerifthewheels arein theFreewheel
position.Inthe Freewheelposition, the
wheelswill not hold the tiller backand the
revolving Linescould propelthetiller rapid-
ly,possibly causingloss ofcontrol. Always
engagethe wheels with the wheeldrive
pins in the WheelDrive position before
starting the engine or engagingthe
tines/wheelswith the ForwardClutchBail
(all models_or the ReverseClutchcontrol
(Models 634F/634Bonly).
14. Beaware that the tiller may unex-
pectedlybounceupwardorjumpforward
if thetines shouldstrike extremelyhard
packedsoil, frozenground,or buriedob-
stacleslike largestones,roots,or
stumps.
waysusethefollowingoperatingprecau- behotfrom operation.Letparts cooldown
tionstoassistyouinmaintaining control sufficiently.
ofthetiller:
a. Walk behindandto oneside ofthe
tiller, usingonehandonthehandle
barsRelax yourarm, but usea
securehandgrip.
b. Useshallowerdepthregulator
settings,workinggraduallydeeper
with eachpass.
c. Useslowerenginespeeds.
d. Clearthetilling area ofall large
stones,rootsorotherdebris.
e. Avoidusingdownwardpressureon
the handlebars.If needbe. use
slightupwardpressureto keepthe
tines from diggingtoodeeply.
f. Beforecontactinghardpackedsoil
at theend ofa row.reduceengine
speedandlift thehandlebarsto
raise thetines outofthesoil.
25. Pleaseremember:Youcanalwaysstop
thetines and wheels by releasingthe For-
ward Clutch Bailor on Models 634Fand
634B the ReverseClutchcontrol. _which-
evercontrol isengaged),or by movingthe
Egnitionswitch and/orthrottle control lever
on the engineto "OFF"or "STOP".
26. To load or unloadthe tiller, seethe in-
structions in Section4 of this Manual.
27. Useextremecaution when reversing
or pulling the machinetowards you.
28. Start the enginecarefullyaccording to
instructions and with feet well away from
thetines.
29. Neverpickupor carry amachinewhile
theengine is running.
MaintenanceandStorage
g. Inanemergency,stopthetinesand
wheels byreleasingwhichever
clutchcontrolis engaged.Do not
attemptto restrainthetiller.
15. Donot overloadthe tiller's capacity by
attempting to till too deeplyattoo fast a
rate.
1. Keepthe tiller, attachmentsand acces-
sories in safe working condition.
2. Checkall nuts bolts, andscrews at
ervalsfor proper tightness to ee surethe
equipment is in safe working condition.
3. Neverstore thetiller with fuel in thefuel
tank insidea building whereignition sourc-
16. Neveroperatethe tiller at high trans- esare presentsuchashotwater andspace
port speeds on hard or slippery surfaces
Look behindand usecarewhen backing
up
17. Do notoperatethetiller ona slopethat
is too steep for safety.When on slopes,
slow down and makesure you havegood
footing. Never permitthe tiller to free-
wheeldown slopes.
18. Neverallow bystanders nearthe unit.
19. Onlyuseattachments andaccessories
that are approvedby the manufacturer o1
the tiller.
20. Usetiller attachmentsand accessories
when recommended.
21. Neveroperatethe tiller without good
visibility orlight.
22. Neveroperatethe tiller ifyou aretired:
or underthe influence ofalcohol, drugs or
medication.
23. Operatorsshallnottamper with the en-
gine-governor settings onthe machine:
heaters,furnaces, clothesdryers, stoves,
electric motors, etc.L Allow the engineto
COOlBeforestoring the unit inany enclo-
sure.
4. To reducethe chancesof a fire hazard.
keeptheenginefree ofgrass, leaves,or ex-
cessivegrease.
5. Storegasolinein a cool. well-ventilated
area.safelyaway from any spark- or
flame-producing equLpment. Storegaso-
line in an approvedcontainer,safelyaway
from the reachof children.
6. Refedto the Maintenancesections of
this Manualand the separateEngineOwn-
er'sManualfor instructions ifthe unit isto
ee stored for an extendedperiod
7. Neverperform maintenancewhilethe
engineis runmng orthe spark plug wire is
connected,exceptwhen specifically in-
structed to do so.
8. Ifthefueltankhastobedrained dothis
outdoors.
the governor controls the maximum safe
operatingspeedto protectthe engine and
all moving parts from damagecaused by
overspeed. Authorized serviceshall be
sought if a problem exists.
Decals
Foryour safety and the safety of others, vari-
ous safetyand operationa!decalsare located
on your unit (seeFigure1-2).
Keepthe decalscleanand legibleat all times.
Contactyour localservicedealerorthefactory
for replacementsifanydecalsare damagedor
missing.
Referto the PartsList pagesinthis Manualfor
decallocations, descriptions and part num-
bers.
ForwardClutchBail
StartingStabilization
Message(onengine)
ReverseClutchControl
OperatingInstruction
(Models 634F/634B)
WarningMessages
HotSurfacesWarning
Figure 1-2: Locationof safelyand operatingdecals(5,5 HP Model shown),
OperatingSymbols
Var_us_bds(shownhere,w_hworddesk)
maybeusedonthe_llera_dengine.
NOTFzYeur_n'_r_thavealid_symb_.
I-'-I ltl R
CHOKE CHOKE REVERSE _ON OFF ROTATINGTINES
BAIL
,K÷ ENOAOE.
FAST SLOW STOP TILLERDIRECTION LEVERDIRECTION
BAIL
DISENGAGED
TO AVOIO SERIOUS INJURY:
• READTHEOWNER'SMANUAL.
• KNOWLOCATIONSAND FUNCTIONSOFALLCONTROLS.
• KEEPALLSAFETYDEVICESANDSHIELDSIN PLACEAND WORKING.
• NEVERALLOWCHILDRENORUNINSTRUCTEDADULTSTO OPERATETILLER.
• SHUTOFFENGINEANDDISCONNECTSPARKPLUGWIRE BEFOREMANUALLYUN"
CLOGGINGTINESORMAKINGREPAIRS.
• KEEPBYSTANDERSAWAYFROMMACHINE.
• KEEPAWAYFROMROTATINGPARTS.
• USEEXTREMECAUTIONWHENREVERSINGOR PULLINGTHEMACHINETOWARDS
YOU.
SECTION2: ASSEMBLY
WARNING: To prevent
personalinjury or property
damage,do notstartthe engine
until all assemblysteps are
completeandyou haveread
and understandthe safety and
operatinginstructions in this
manual.
INTRODUCTION
Carefullyfollow these assemblysteps to
correctly prepareyour tiller for use. It _s
recommendedthat you readthis Section
in its entirety beforebeginning assembly.
NOTE: Various tiller models are
presented in this Manual. Use only the
ASSEMBLYSTEPS
STEP 1: UNPACKINGINSTRUCTIONS
NOTE:While unpackin0, do not severely
bendany control cables.
1.Thetiller weighs approximately133 lbs.
Donot attempt to remove it from the ship-
ping platform until instructed to do so in
these Assembly steps.
2. Removeanypackaging materialfrom
the carton. Removeany staplesfrom the
bottom ofthe carton and removethe car-
ton from the shipping platform.
3. Removeall unassembledpartsand the
separatehardwarebagfrom the carton.
Checkthat you havethe items listed in the
information appropriate for your tiller LoosePartsList(contactyourlocaldealer
model, orthe factory itemsare missing or dam-
aged).
INSPECTUNIT
Inspectthe unitand cartonfor damagetm-
mediatelyafter delivery. Contactthe carri-
er (trucking company) if you find or
suspectdamage. Inform them of thedam-
ageand request instructions for filing a
claim. Toprotect your rights, put your
claim in writing and maila copyto the car-
rier within 15 days after the unit hasbeen
delivered.Contact Troy-Bilt LLCit you
needassistancein this matter.
NOTE: Use the screw length template
(Fig.2-1) toidentify screws
LoosePartsList
TOOLSMATERIALSNEEDED
(11 3_8"open-endwrench-
(2) 7/16"open-end wrench-
(.2_ 1/2" open-end wrench*
(.2_ 946"open-end wrench-
(1) Largead Jstablewrench
_Models634F/634Bonly)
(.11 Scissors totrim plasticties
(1) Ruler (for belttension check_
Ill Blockof wood (to support tiller when
removing wheels)
(1) Tire pressure gauge_formodelswith
pneumatictires_
111 Cleanoil funnel
Ill Motoroil Refertothe EngineOwner's
Manualfor oil specificationsand
quantityrequired.
* Adlustable wrenchesmay Deused.
m
Figure2-1: Toidentifylengthofscrews,place
screwontemplateasshownandmeasuredis-
tancebetweenbottomofscrewheadandtipof
screw,
STEP 2: ATTACH HANDLEBAR
Qty. Description
1 HandlebarSupport (seeA, Fig. 2-2_
1 HandlebarAssembly(seeK,Fig.2-2)
Hardwarebag contents:
1 Slottedhd. screw #10-24 x 2'
1 Hexbd.screw 1/4-20 x 1-1/4
6 Hexhd.screw 5/16-18x 1-1 2"
2 Hexhd.screw. 3/8-16 x 3/4
2 FlatWasher.3/8°
6 Split Iockwashe_5/16_
1 HexIocknut. 1/4"-20
8 Hexnut. 5/16"-18
1 Hexnut #10-24
2 HexIocknut.3_8"-16
1 Spring, cable(seeW, Fig.2-5'_
1 Bracket.forward clutch cable
(seeP,Fig.2-4_
2 Lockwasher 3/8
2 *Self-tapping screw. 1/4-20 x 1/2
1 *Bracket reverseclutch cable
Model 634F& 634B only
IMPORTANT:Motor oil must beaddedto
the enginecrankcasebeforetheengine is
started. Followthe instructions inthis
Sectionand in theseparateEngine
Owner'sManual.
1. Looselyattachthe legsofthe handlebar
support (A, Fig.2-2) to the innersides of
thetiller frame usingtwo 3/8"-16x 3/4"hex
hd. screws (B), 3/8"flat washers(C), 3/8"
lock washers (GG',and 3/8"-16 hexlock-
nuts (D',
2. Therearethree heightadjustment holes
in the two handlebarsupport brackets (.E
and E Fig. 2-2). Usea setting that will po-
sition the handlebarsat approximately
waist levelwhenthetines are3"-4"intothe
soil. Looselyattachthe support brackets
to the handlebarsupport (.A_using two
5/16"-18x 1-1/2" screws (G),5/16" split
Iockwashers(.H)and5/16"-18 hexnuts [I).
NOTE: If a support bracketwill not move
loosenattaching screw (J) and nut.
3. Attach the handlebarassembty(.K_to
the handlebarsupporl (A) usingfour 5.
16"-18x 1-1/2" screws (.G_,5/16"split
Iockwashers(H)and5/16"-18 hexnuts (I).
Tightenthe four screws securely
4. Tighten all handlebarmounting hard-
waresecurely.
STEP3: MOVE TILLER OFF
Toroll thetiller off the shipping platform.
put the wheels in freewhee asfollows:
1. Placea sturdy block underthetransmis-
NOTE:LEFTandRIGHTsidesofthetiller sion to raise onewheelabout 1" offthe
are as viewedfrom the operator's position ground.
behind thehandlebars.
Fig. 2=3: Wheelin FREEWHEELposition
STEP4: INSTALL FORWARD
CLUTCH CABLE
1. Attach theforward clutch cablebracket
(P,Fig.2-4) to the handlebarsupport AI
with a 1/4"-20x 1-1/4"hexhd. screw (R)
and 1/4"-20hexIocknut (S).Tighten se-
curely.
2. Carefullyunwrapthe forward clutch ca-
ble (cablewithout anattached knob, from
its shipping position and slidethe thin ca-
ble wire (T,Fig.2-4) intothe slot in the ca-
ble bracket. Pushthe cableconnector(U,
Fig.2-4) upthrough the holein thebracket
until the groove in the connector snaps
into place.
3. Insertthe #10-24 x 2"slotted hd.screw
(V,Fig.2-5) downthrough the hookedend
of the cablespring (W) until the screw
Fig.2.2:Atlachhandlebar(5.5 HpMOde!shown), threads extendthr0ugh the spring.
2. Removethe hairpin cotter (L, Fig.2-3)
and wheeldrive pin (M) from the wheel
hub (0) and wheelshaft (N).
3. Slidethe wheelfully inwardonthewheel
shaft (N, Fig.2-3). Reinstall the wheel
drive pin (M) through the wheelshaft only
(not through thewheel hub). Securethe
wheeldrive pin with the hairpin cotter (L),
pushingthe hairpincotter in asfar asit will
go. Thewheelshould now spin freely
(freewheel) on the wheelshaft. Repeat
with the other wheel.
4. Usethe handlebarto roll the tiller to a
flat area.
IMPORTANT:BeforeStartingtheengine,
thewheels must be placedin theWHEEL Fig.2-4.Installingforwardclutchcablebracketandcable.
DRIVEposition (pins through wheelhubs
andwheelshaft). This procedureis
described in WheelDrive Pinsin Section3.
4.Threadthe#10-24 hexnut (Z, Fig. 2-5)
halfwayonto the screw (V).
5. Threadthe screw IVI into thecable ad-
juster (X).
6. Hookthecablespring (W, Fig.2-6) into
theV-shapedbend in the ForwardClutch
Bail
7. Checkfor correcttension ontheforward
drive belt bytaking two measurementsof
thecablespring, asfollows:
a. With the ForwardClutch Bail (Y,Fig.2-
6/in an open(released)position, measure
thelength ofthecablespring (W from the
outermost coil to the outermost coil.
D.SqueezetheForwardClutchBailagainst
the handlebar(seeFig. 2-7_and re-mea-
surethe spring length, Thebelt tension is
correct if this secondmeasurementis be-
tween 1/16"to 34 6"longer than thefirst
measurement. If so. turn the hexnut (Z.
Fig.2-7) tightly against the cableadjuster
(X_while preventingthe cableadjuster
from turnmg.
c. If the spring length is incorrect, you
mustadjust thecabletension asdescribed
Fig. 2-7: Tocheckforwardbelt tension,lake twomeasurementsof thelength ofthecoilsin the
spring- first with thebail open, then withthe bail heldagainstthe handlebar,
STEP 5: INSTALL REVERSE CLUTCH
CABLE (MODELS 634F & 634B ONLY)
1. Unwrapthe reverseclutch cable(CC.
Fig.2-8 and Fig.2-9_from its shipping po-
sition and route it up to the handlebar. Be
surethat the cableis routed beneaththe
in Checkingand Adjustin_ Forward Drive Forward ClutchBail.
Belt Tensionin Section 5. Incorrect cable
tension can result in belt slippage Icable
tension too IooseJ.or unintentional tine
movement whenthe clutch bail is in Neu-
tral _cabletension too tight}
2. Usingthe two self-tapping screws (AA,
Fig.2-8) securethe reversecable mount-
ing bracket(BB)to the handlebars as
show_
3. Insertthe cable(CC,Fig.2-8) throughthe
slotinthecablebracketandpositiontheflat
sideofthe threadedassemblynextto the
flat sideofthe hole. Slidethe hexnut (DD/
up thecableandtighten it securely.
4. Fastenthe reverseclutchcableto the
leftsidehandlebarwitha cabletie (EE,Fi_
2-9L
5. Testthefunction ofthe reverseclutch by
pulling out and releasingthe cableknob.
Theknob should return to its neutral posi-
tion (resting against bracketL If it doesn't.
contact your localdealer or Troy-Bilt LLC
for technical assistance.
Wm
Zm
X--
CC
Fig. 2-8: Install reversecable bracketand
reverseclutchcable,
Fig. 2-5: Cable
springand
adjuster.
Fig. 2-6:Attachforward
clutch cablespringto
forwardclutchbail.
Fig, 2-9: Routereverseclutchcable(CC)as
shown, Attachwith cabletie (EE).
31bY I_: UI'IEUK LEVEL UI-
Thetransmission wasfilled with gearoil at
thefactory.However,youshouldcheckthe
gearoil levelatthis time to makecertain it
is correct.
IMPORTANT:Donot operatethe tiller ifthe
gearoil levelis low. Doingso will result in
severedamageto thetransmission com-
ponents.
1. With the tiller on levelground, pull the
Depth RegulatorLever(FF,Fig. 2-10) back
andthen all the way up until the lowest
notch in the lever isengaged.
2. Removethe oil fill plug (GG,Fig.2-11)
from the transmission housingcover and
locatethe maindrive shaft situated inside
the housing.
3. Thegear oil levelis correct if the gear
oil isapproximately halfwayup theside of
the maindrive shaft.
4. Ifthe oil levelis low,add gearoil byre-
ferring to A. ToCheckthe Transmission
GearOil Level in Section 5.
_IbY I: AUU MUIUH UIL
Thetiller isshipped withoutoil in theen-
gine.
IMPORTANT:Donotstart the enginewith-
outfirst adding motor oil. Severeengine
damagewill result ifthe engineis run with-
out oil.
1. Referto the separateEngineOwner's
Manualfor engine oil specifications and
capacities.
2. With thetiller on levelground, movethe
Depth RegulatorLever(FF,Fig.2-10) up or
down until the engine is level.
3. Add motor oil asdescribed in the En-
gine Owner'sManual.
4. Movethe Depth RegulatorLeverall the
way down until the highest notch is en-
gaged. This placesthetines in the"travel"
position, which allows the tiller to be
moved without thetines touching the
ground.
STEP8: CHECKHARDWARE
Checkall nuts andscrews for tightness.
STEP 9: CHECKAIR PRESSURE IN
TIRES (units with pneumatic tires)
Ontires equipped with air valves, check
theair pressure with atire gauge. Deflate
or inflate the tires equally to between15
PSIand20 PSI(pounds persquareinch).
Besure that both tires are inflated equally
or the unit will pull to one side.
Fig. 2-10: AdjustDepthRegulatorLever.
._ru.l_N i: his compie_esme assemoiy steps.
Beforeoperatingyour tiller, makesure you readthe
{ollowingsections in this Manual,aswell as the
separateEngineOwner'sManual:
• Section 1: Safety
• Section 3: Featuresand Controls
• Section 4: Operation
Fig.2-11:Removegearoilfillplug.
SECTION3: FEATURESANDCONTROLS
WARNING: Before
operatingyour machine,
carefully readand understand
all safety,controls and
operatinginstructions in this
Manual,the separateEngine
Owner's Manual,andon the
decalson the machine.
Failureto follow these
instructions canresult in
serious personalinjury.
INTRODUCTION
This Section describesthe location and
function of thecontrols on your tiller. Re-
ferto the following Section,Operationfor
detailedoperating instructions.
Practiceusing these controls, with the en-
gine shut off, until you understandthe op-
eration ofthe controls and feelconfident
with eachof them.
Forward
Reverse ClutchControl
(Models634F/634B)
DepthRegulator
Handlebar HeightAdjustment
Wheel Drive Pin
(oneachwheel)
ENGINE CONTROLS
Referto the enginemanufacturer's Engine
Owner'sManual(included in the tiller liter-
ature package)to identify the controls on
your engine.
IMPORTANT:Thecontrol for stopping the
engine is located on the engine.
WHEEL DRIVE PINS
Eachwheelis equippedwith a wheeldrive
pin (A, Figures3-2 and 3-3) that secures
thewheelto the wheelshaft (B). The
wheelscan be positioned in either a
WHEELDRIVEora FREEWHEELmode.
WARNING: Neverallow
eitherof thewheelsto bein the
FREEWHEELposition whenthe
engineis running. Alwaysput
both wheelsin theWHEEL
DRIVEposition beforestarting
theengine.
Failureto comply could cause
loss of tiller control, property
damage,or personalinjury.
Beforestarting theengine,put bothwheels
in the WHEELDRIVEposition byinserting
thewheel drive pins through the wheel
hubsand the wheel shaft. Doingso
"locks" the wheels to the wheel shaft,
causingthe wheelsto turn wheneitherthe
Figure3-1:Tillerfeaturesandcontrols(5. HPModelshown).SeeS_eparateEngineOwner's
Manualtoidentifyenginecontrols.
Forward ClutchBail (all models) or the Re-
verseClutch Control (Models 634Fand
634B) is engaged.
Usethe FREEWHEELmode only whenthe
engineis notrunning. In FREEWHEEL,the
wheeldrive pins are placedonly through
theholes in thewheelshaft (not the wheel
hubs), thus allowing the wheels to turn
freely whenyou manually movethe tiller.
Toplacethewheels in WHEELDRIVEor
FREEWHEEL:
1. Stopengine,disconnectsparkplugwire
from spark plugandallowengineto cool.
_ ARNING: Donot place
tiller on its sidewhenchanging
wheeldrive positions. Doingso
could result in gasolineleaking
from thefuel tank.
Failuretofollow this instruction
could result in personal injury
or property damage.
2. Raiseonewheelabout one inch offthe
ground and placeasturdy support under
thetransmission.
3. Removehairpincotter (C, Figures3-2
and 3-3) from wheel drive pin (A).
4. FORWHEELDRIVEMODE(Figure3-2):
Slide wheeloutward and align holes in
10
Figure3-2: WHEELDRIVE position.
wheelhub (D, Figure3-2) and wheel
shaft (B). Insert wheeldrive pin (A)
through wheel hub (D)and wheel
shaft (B). Securewheeldrive pin with hair-
pin cotter (C) by pushing hairpin cotter in
asfar as it will go. Repeatwith the other
wheeland then remove thesupport from
beneaththe transmission.
5. FORFREEWHEELMODE( Figure3-3):
Slidethewheelinwardand insertthewheel
drive pin (A, Figure3-3) onlythrough the
hole in the wheel shaft (B). Securewheel
drive pinwith hairpincotter (C)bypushing
hairpin cotter in asfaras it will go. Repeat
for the other wheeland then remove the
support from beneaththe transmission.
Figure3-3: FREEWHEELposition.
WARNING: Useextreme
caution whenreversing or
pulling the machinetowards
you. Look behindto avoid
obstacles.
Neverattempt totill in reverse.
Failureto follow this warning
could result in personal injury
or property damage.
Tooperatethe ReverseClutchControl:
1. Putwheels inWHEELDRIVEposition
(see"WARNING"statementat the left).
2. Stopall tiller motion by releasingthe
Forward ClutchBail.
_, WARNING: Beforestarting 3. Lift the handlebaruntil the tines clear
engine,besurethat both theground, look behind you to avoid any
wheelsare inWHEELDRIVE obstacles,and then pull the control knob
position. SeeWheslDrivePins (F,Figure3-4) out. The wheelsand tines
for instructions, will rotate in a reversedirection.
EngagingtheForwardClutch 4. Releasethe control knobto disengage
Bail or ReverseClutchControl (stop)thewheelsand tines(theenginewill
(if equipped) whenthewheels continue to run).
arenot inWHEELDRIVEcould
allowthe tines to rapidly propel
thetiller forward or backward.
Failureto comply could cause
loss of tiller control, property
damage,or personalinjury.
FORWARDCLUTCHBAIL
ThForwardClutch Bail(E,Figure3-4) con-
trols the engagementofforward drive to
thewheels and tines.
Tooperatethe ForwardClutchBail:
1. Put wheelsin WHEELDRIVEposition Figure3-4:AIImodelshaveaForwardClutch
(see"WARNING"statementabove). Bail (E). OnlyModels634F/g34Bhavea Re,
verseClutchControl(F).
2. Lift and hold the clutch bail(E,Figure3-
4)againstthehandlebartostartthewheels DEPTH REGULATOR LEVER
andtines rotating in a forward direction.
This lever (G,Figure3-5) controls the till-
3. Releasethe clutch bail to disengage ing depth of the tines. Pull the leverback
(stop) thewheelsandtines (theenginewill and slide it up or down to engagethe
continue to run). notched height settings.
REVERSECLUTCHCONTROL The"travel position"(highest notch) raises
(Models634F/634B only) thetines approximately1-1/2"off the
ground,allowing the tiller to be moved
TheReverseClutchControl (F,Figure3-4) without the tines contacting the ground.
controls the engagementof reverse drive This setting should also be usedwhen
to the wheelsand tines. The reversing starting the engine.
featureisusedformaneuveringthetiller
only-- neverengagethetines inthe Moving the leverupward will increasethe
groundwhile operatingin reverse, tilling depth. Thelowest notch allowsa till-
ing depth of approximately 6", depending
on soilconditions. Forbestresults,always
begintilling atavery shallowdepthsetting
and gradually increasethe tilling depth.
WARNING: Donotattempt
totill too deeplytoo quickly.
Graduallywork downto deeper
tilling depths.
Placethe DepthRegulator
Leverin the "travel" position
beforestartingthe engine. This
position preventsthetines from
touching the ground until you
arereadyto begintilling.
Failuretofollow this warning
could result in personalinjury
or property damage.
Figure3-5: DepthRegulatorLever (GJ.
HANDLEBAR HEIGHT ADJUSTMENT
Thehandlebar heightisadjustableto three
different settings (Figure3-6). In general,
adjust the handlebarssothey areat waist
levelwhenthe tines are 3"-4"in the soil.
Toadjustthe handlebars:
1. Stop engine,disconnect spark plug
wire from spark plug and allow engine to
cool.
2. Removehardware,reposition handle-
bars, and reinstall hardwaresecurely.
Figure3-6:Handlebarheightadjustment.
11
SECTION4: OPERATION
WARNING: Before ReverseClutchControl
operatingyour machine, (Models634F/634B)
carefully readand understand
all safety (Section 1),controls
(Section 3) and operating
instructions (Section 4) inthis
Manual,the separateEngine
Owner's Manual,andon the Clutch Bail
decalson the machine.
Failureto follow these
instructions canresult in
serious personalinjury.
INTRODUCTION
Readthis OperationSection and the sepa-
rate EngineOwner's Manualbeforeyou
start the engine. Then,takethe time to fa-
miliarize yourself with the basicoperation
of the tiller beforeusing it in the garden.
Findan open,levelareaand practiceusing
thetiller controls without thetines engag-
ing the soil (put tines in "travel" setting).
Onlyafter you've becomecompletely fa-
miliar with thetiller shouldyoubegin using
it in the garden.
BREAK-INOPERATION
Perform the following maintenanceafter
thefirst two (2) hours of newoperation
(seeMaintenanceSection in this manual
and in the EngineOwner's Manual).
1. Changeengineoil.
2. Checkfor looseor missing hardwareon
unit. Tighten or replaceas needed.
3. Checktension on forward drive belt.
4. Checktransmission gear oil level.
STARTINGANDSTOPPING
Pre-StartChecklist
With the spark plug wire disconnected
from the spark plug,perform thefollowing
checksand services beforeeachuse:
1. Readthe Safetyand ControlsSections
in this manual. Readthe separateEngine
Owner'sManual providedwith the unit.
2. Putthewheels in theWHEELDRIVE
position (wheel pins must be through
holes in wheel hubsand wheel shaft).
3. Checkunit for loose or missing hard-
ware. Serviceas required.
4. Checkengine oil level. SeeEngine
Owner'sManual.
Pin
Fig.4-1
5. Checkthat all safetyguardsand covers
are in place.
6. Checkair cleanerand enginecooling
system. SeeEngineOwner'sManual.
WARNING: GASOLINEIS
HIGHLYFLAMMABLEAND ITS
VAPORSAREEXPLOSIVE.
Follow gasolinesafety rules in
this Manual(seeSection1) and
in the separateEngineOwner's
Manual.
Failureto follow gasolinesafety
instructions can result in
serious personalinjury and
property damage.
7. Fillthefueltank with gasolineaccording
to the directions in the separateEngine
Owner'sManual. Followall instructions
and safety rules carefully.
8. Attach spark plug wireto spark plug.
StartingtheEngine
Thefollowing steps describe how to start
and stop the engine.
WARNING: Donotattempt
to engagethetines or wheels
until you havereadall ofthe
operatinginstructions in this
Section. Also, reviewthesafety
rules in Section1: Safety,and
the tiller and enginecontrols
information in Section3:
Featuresand Controls.
1. Completethe Pre-Start Checklist on
this page.
2. Putthe wheelsinthe WHEELDRIVEpo-
sition (seeWheeIDrivePinsinSection 3 of
this manual).
_ ARNING: To help
prevent serious personalinjury
or damageto equipment:
• Beforestartingengine,putbothwheels
in the WHEELDRIVE position. Never
have wheels in FREEWHEELposition
when engine is running. When the
wheels are in FREEWHEEL,they do not
hold backthe tiller and the tines could
propelthetiller rapidly
ward orbackward.
• Before starting engine, put Forward
Clutch Bail (all models) and Reverse
ClutchControl(Models 634F/634Bonly)
in neutral (disengaged) positionsby re-
leasing levers.
• Never run engine indoorsor in en-
closed, poorly ventilated areas. Engine
exhaust contains carbon monoxide, an
odorlessand deadlygas.
• Avoidenginemufflerandnearbyareas.
Temperaturesin theseareas mayexceed
150oF.
3. Movethe Depth RegulatorLeverall the
way down to the "travel" position, sothat
thetines clearthe ground.
4. Releaseall controls on thetiller.
5. On engine'swith a fuel shut-off valve,
turn valve to open position, as instructed
in the separateEngineOwner's Manual.
6. Putignition switch and/or throttle con-
trol leverlocated on engine in the "ON",
"RUN", "FAST"or "START"position, as in-
structed in the EngineOwner's Manual.
7. Chokeor prime engine,asinstructed in
EngineOwner'sManual.
8. Putone handon fuel tankto stabilize
unit when pulling starter rope handle.
Thenuserecoil starter to start engine,as
instructed in the EngineOwner's Manual.
Whenenginestarts, graduallymove choke
lever (if so equipped) to "NOCHOKE",
"CHOKEOFF"or "RUN" position.
9. Usethe "FAST"throttle speedsetting
whentilling.
12
KEEPAWAYF_OMROTATING11NES.
ROTATING11NE$WILLCAUSEINJURY.
Stoppingthe EngineandTiller
1. Tostop thewheelsandtines, releasethe
ForwardClutch Bail(all models) or the Re-
verse ClutchControl (Models 634Fand
634B) -- whichevercontrol isin use.
2. Tostop theengine, putthe ignition
switch and/or thethrottle control leverin
the "OFF"or "STOP"position.
OPERATINGTHETILLER
Thefollowing operating instructions pro-
videguidelines to usingyour tiller effec-
tively and safely. Besureto read Tilling
Tips& Techniquesin this Section before
actually putting the tines into the soil.
NOTE:This isa traditional "Standard-Ro-
tating-Tine" (SRT)tiller with forward ro-
tating tines. It operatescompletely
differently from "Counter-Rotating-Tine"
(CRT)tillers or from front-tine tillers.
1. Followthe Pre-Start Checklist at the
beginning ofthis Section. Besurethat the
wheelsare in theWHEELDRIVEposition.
2. Movethe Depth RegulatorLeverall the
way down, sothat thetines clearthe
ground. Usethis position whenpracticing
with thetiller and when traveling between
tilling sites. Beforeactuallytilling, move
the leverto the desireddepth setting (see
Tilling Tips & Techniques).
3. Start engine and allow itto warm up.
Thenput throttle in "FAST"setting.
4. For forwardmotion of the wheels and
tines:
(a) Pull ForwardClutch Bail (Fig.4-1) up
againsthandlebar. Releasebailto stopfor-
ward motion of wheels andtines.
(b) Whentilling, relaxand letthe wheels
pull the unit while thetines dig. Walk be-
hindand a little to onesideofthe unit. Use
one hand,yet keepalight--but secure--
grip on the handlebar(while keepingyour
arm loose). SeeFig.4-2. Let the unit
move at its own paceand do not push
down on the handlebarsto try and force
thetines todig deeper--this takesweight
off the wheels,reduces traction, and caus-
esthe tines to try and propel the tiller.
WARNING: Donot push
down onthe handlebarsto try
to makethetiller till more
deeply. This preventsthe
wheelsfrom holdingthetiller
backand canallow thetines to
rapidly propelthetiller forward,
which could result in loss of
control, property damage,or
personalinjury.
5. For reversemotion of the wheelsand
tines (Models 634F/634Bonly):
(a) Lookbehindandexercisecaution when
operating in reverse. Donottill while in
reverse.
(b) Stopall forward motion. Lift handle-
bar with one handuntil tines are off the
ground and then pull ReverseClutchCon-
trol knobout (seeFig.4-3). Tostop revers-
ing, let go of ReverseClutch Control knob.
(b) Swingthe handlebarto the left sothe
right wheeltakesa "step" backward.Next
swing the handlebarto the right so theleft
wheel"steps" backward.Repeatasneeded.
(c) If longer distances needto becovered
in reverse,shut off the engine,then place
thetwo wheels in FREEWHEEL.
7. ToTurnthe TillerAround:
(a) Practiceturning thetiller in a level,
open area. Bevery carefulto keepyour
feetand legsawayfrom the tines.
(b) Tobegina turn,lift the handlebarsuntil
thetinesareoutofthegroundandtheengine
andtines are balancedoverthewheels(Fig.
4-4).
(c) With tiller balanced,pushsidewayson
handlebarto steer in direction of turn (Fig.
4-5). After turning, slowly lowertines into
soil to resumetilling.
Fig.4_4: Tobeginturn,lift handlebarsuntil
tinesareoutofgroundandunitisbalanced.
Fig.4-5: Withtinesoutofground,pushhan-
dlebarssidewaystoturntiller.
Fig.4-3: Raisetinesoffgroundandlook StoppingtheTillerandEngine
behindwhenmovinginreverse. 1. Tostop thewheels andtines, release
6. To movethe Model630Cin reversefor
short distances:
(a) Releaseforward ClutchBail. Thenlift
Fig.4-2: Useonehandtoguidetiller when handlebaruntil tines areoff theground.
movingforward.
the ForwardClutchBail (all models)or the
ReverseClutchControl (Models 634Fand
634B) -- whichevercontrol is in use.
2. Tostop theengine, putthe ignition
switch and/orthethrottle control leverin
the "OFF"or "STOP"position.
13
TILLING TIPS& TECHNIQUES
TillingDepths
_=i, WARNING: Before
A L• tilling, Contactyour
m, m. telephoneor utilities
companyand inquire if
underground equipment or
linesare usedon your
property. Do nottill near
buried electric cables,
• Avoidpushingdownonthehandlebarsin anattemptto forcethetillertodig deeper•Doing
sotakestheweightoff thepoweredwheels,causingthemto losetraction•Withoutthewheels
helpingto holdthetiller back,thetineswill attemptto propelthetiller- often causingthetiller
to skip rapidlyacrosstheground• (Sometimes,slight downwardpressureonthe handlebars
will helpgetthrougha particularlytough sectionof sodor unbrokenground,butin mostcases
this won't benecessary.)
• Avoidtrying to digtoo deeplytoo quickly,especiallywhenbustingsodor whentilling soil
that hasn'tbeentilledforsometime• Useshallowdepthregulatorsettings(onlyaninchortwo
deep)forthefirst passesthroughthesoil• Witheachsucceedingpass,diganotherinchortwo
deeper•(Wateringtheareaafew daysprior totilling will maketilling easier,aswill lettingthe
telephonelines, pipesor newlyworkedsoil setfor a dayor twobeforemakinga final, deeptilling pass.)
hoses.
• Whencultivating(breakingupsurfacesoilaroundplantstodestroyweeds,seeFig.4-9),adjustthetinestodigonly1"to 2"deep• Using
shallowtilling depthshelpspreventinjuryto plantswhoserootsoftengrow closeto thesurface. If needed,lift uponthehandlebarsslightly
to preventthetines fromdiggingtoo deeply. (Cultivatingon a regularbasisnotonlyeliminatesweeds,it also!oosensandaeratesthe soil
for bettermoistureabsorptionand fasterplantgrowth•)
ChoosingCorrectWheel&Tine Speeds With experience,you will find the"just right" tillingdepthandtillingspeedcombination
that is bestfor yourgarden•
Settheenginethrottleleverataspeedtogivetheengineadequatepowerandyetallowitto operateattheslowestpossiblespeed...atleast
until you haveachievedthe maximumtilling depthyou desire.Fasterenginespeedsmaybedesirablewhenmakingfinal passesthrough
theseedbedor whencultivating•Selectionofthecorrectenginespeed,in relationto thetilling depth,will ensureasufficientpowerlevelto
dothejobwithout causingtheengineto labor.
Let theTiller Dothe Work
Whiletilling,relaxandletthewheelspuIIthe
tiller along while the tines do the digging•
Walkonthe sidethat is notyet finished(to
avoidmakingfootprints in thefreshlytilled
soil) and lightly, butsecurelygrip the han-
dlebarwith justonehand,
AvoidMakingFootprints
Wheneverpossible,walk on the untilled
sideoftheunittoavoidmakingfootprints in
your freshlytilled or cultivatedsoil• Foot-
printscausesoil compactionthat canham-
per root penetration and contributeto soil
erosion. They can also !'plant" unwanted
weed seeds back into the freshly tilled
ground•
AvoidTillingSoggy,WetSoil
Tilling wet soil often resultsin large,hard
clumpsof soil that caninterferewithplant-
ing.If time permits, wait a dayor two after
heavyrainsto allowthe soil to dry before
tilling• Testsoil bysqueezingit intoaball.If
itcompressestoo easily,itistoowet totill.
PreparingSeedbeds
• Whenpreparinga seedbed,go overthe samepathtwice in the first row,then
overlapone-halfthetiller width on the restofthe passes(seeFig.6). Whenfin-
ishedin onedirection, makea secondpassat a rightangle,as shownin Fig.4-7.
Overlapeachpassfor best results(in very hardground,it maytakethreeor four
passesto thoroughlypulverizethesoil.)
Fig. 4-6 Fig. 4-7
Cultivating
• Ifthegardensizewillnotpermitlengthwiseandthencrosswisetilling thenover- With nlanninn ,,ou can _,_v_, _r_
lapthefirst passesbyone-halfatiller. . aIIow e_noughr'oo_m _-_) " _ "-(_ "
width,followedbysuccessivepasses betweenrows to Cut vate _ _ ,_
atone-quarterwidth"(seeE'g 4-8) ........... _ .................. _' _
............ tseerig. ,4-u).Leaveroom ¢2,._ @ #_
• _ _._ t,.2j
' ' for the hood width, ._, _,-_, _ '
plus enough extra _ 4_',, _11
Fig.4-8 roomfor future plant Fig.4-9
growth.
14
TILLING TIPS& TECHNIQUES(CON'T)
PowerComposting
Powercompostingsimplymeanstillingunderand buryinginthesoilall mannerof organic WARNING: Whenpower
mattersuchascropresidues,leaves,grassclippingsandcovercrops. This materialwillde- composting, do not keepthe
composeduring thenon-growingseasonandadd importantnaturalnutrientsto the SO DepthRegulator Leverata
Thefirst placeto beginiswith cropresiduessuchasleftovervines,stalks,stemsand roots, deepsetting if thetiller jumps
Powercompostthesecropresiduesassoonastheyfinish bearing.Thesoonerthis isdone, or bucks.
thebetter,astendergreenmatteriseasierto till under. Usethedeepestdepthregulatorset- If jumping or bucking occurs,
ting possiblewithoutcausingthe engineto laboror thetillerto jump ahead, movetheDepthRegulator
Leverdown to ashallow
Standingcornstalksof reasonableheightcanbepowercomposted.Pushing over(but not setting andthen slowly
uprooting)cornstalkswill oftenmakeiteasierto chopupthe stalks.Keepthetines clearof
excessivetanglingby,fishtailing"or frequentlyusingreverse.MakeseveralPaSSeS,thenre- increasethetilling depth or}
laterpasses.
turna fewdays aterto f nsh off anyreman ngstubbe ^:,..... ,^,,^. ,,._..... :__
FaHu_uLU/UIIUW tl I1:_ W_/llllly
Aftertilling undercropresidues,addmoreorganicmattersuchasleaves,grassclippingsand could result in personalinjury.
evenkitchenscraps. Whentilled intothe soil,this organicmatterwill decomposeandadd
evenmoreimportantnutrientsto the soil.
Afterpowercomposting,youmaywantto planta "greenmanure"covercropto protectthesoilduringthe off-season.Yousimplygrowa
cropof clover,alfalfa,buckwheat,peas,beans,ryegrass,grain,or kaleandthentill it intothe soil priorto the plantingseason.
TillingOnSlopes
Readthefollowingrecommendati_nsbeforetilling onslopes:
/%
you mustgardenon a moderateslope,pleasefollow two very _mportantgmdelmes:
If
1.Til!onlyon moderatemodes,neveron steepgroundwherefooting sdifficult !"eviewsafe-
ryrules{nSection]: Safetyofthis manuai).
2. We recommendtilling upan{]clownslopes ratherthanterracing. Tillingverticallyon a
slopeallowsmax{mutt plantingareaand alsoleavesroomfor cultivating.
IMPORTANT:Whentilling on slopes besurethecorrectoil levelismaintainedintheengine
checkeveryone-halfhour of oDerat!on_.Theinclineof the slopewl causerne m to slant
WARNING: Donot
operatetiller on aslopetoo
steel_for safe operation. Till
slowly and besureyou have
good footing. Neverpermit
tiller tofreewheel down
slopes. Failureto followthis
warning could result in
personalinjury.
awayfrom its normallevelandthiscanstarveenginepartsof requiredlubrication. Keeothe
motoroH_evmatthefull pointata!ltimes!
Tilling Upand DownSlopes[Vertical Tilling)
• Tokeepsoil erosionto a minimum,besureto addenoughorganicmakerrerne SOilsothat dhasgoodmoisture-holdingtextureandtry
toavoidleavingfootprintsor wheelmarks.
• Whentilling vertically,try to makethefirst pass. _hillasthetiller digs moredeeplygoing uphillthan itdoesdownnm. Insoftsoil or
weees,you mayhaveto lift thehandlebarssbghtlywhilegoinguphill. Whengoingdownhill,overlapthefirst passbyaboutone-halfthe
width ofthetiller.
TillingAcrossSlopesWithoutUsingTerraces(HorizontalTilling)
• f verticalor terracinggardeningaren'tpracticalfor you,then youcantill laterallyacrossa slope. Wedon't recommendthis methodas
t cancreateunsurefooting and invitessoil erosion.
• As interracegardemng,startatthetop oftheslopeand overlapthefirst passey _alfthewidthof thetiller. Foraddedstabilityofthetiller.
alwayskeeptheuphillwheelinthesoft. new_ytilledso_l.
Terrace Gardening
• Whena slope_stoo steepor too short for verticaltilling, It maybenecessaryto t_llacrosstheslopeandcreateterracedrows.Terraces
arerowsthat arecut rotethe sideof a slope,creatinga narrow,butflat areaon whichto plant.
• Ona longs_ope,you canmakeseveralterraces,one belowthe other.
• Terracesshouldbeonly2-to-3 feetwide.Diggingtoofar intothesideoftheslopewil!exposepoorsubsoilthat is unproductivefor plants.
15
TILLING TIPS& TECHNIQUES(CON'T)
TerraceGardening(continued)
• Tocreateaterrace,startatthetopoftheslopeandwork down.Gobackandforth
acrossthefirst r0was shownin Fig.4-!0.
• Eachsucceedinglowerterraceisstartedbywalkingbelowtheterraceyou'repre- 0_11_1__..,..___,_,,. __
paring. Foraddedstabilityofthetiller,alwayskeeptheuphillwheelinthesoft, new-
ly tilled soil. Donot till the last 12"or moreof the downhill outsideedgeof each _1_
terrace. This untilled strip helps preventsthe terracesfrom breakingapartand
ClearingtheTines
Thetines havea self-clearingaction which eliminatesmosttanglingof debrisin
thetines. However,occasionallydry grass,stringystalksor toughvinesmaybe-
cometangled. Followtheseproceduresto helpavoidtanglingandto cleanthe
tines,if necessary.
• To reducetangling, set the depth regulatordeep enoughto get maximum
"chopping"actionasthetines chopthematerialagainsttheground. Also,try to
till undercrop residuesor covercropswhiletheyaregreen,moistandtender.
• While powercomposting,try swayingthe handlebarsfrom sideto side(about
6"to 12"). This 'ffishtailing"actionoftenclearsthetines of debris.
• If tanglingoccurs, liftthetinesout ofthesoilandrunthetiller inreverse(if unit
is equippedwith poweredreverse) for a fewfeet. This reversingactionshould
unwinda gooddealof debris.
• It maybenecessaryto removethedebrisbyhand
(a pocketknifewill helpyouto cut awaythe mate-
rial).Besuretostop theengineand disconnectthe
spark plugwirebeforeclearingthetines byhand.
_lb WARNING: Before the
clearing
tines byhand,Stopthe engine,allow
all moving partsto stop and
disconnect thespark plug wire.
Removethe ignition keyon electric
start models.
Failureto follow this warning could
result in personalinjury.
LOADINGANDUNLOADING • Usesturdy rampsand manually(engine tiller aheadof you. Havea Personat each
shut off) roll the tiller into and out of the sideto turn the wheels.
THETILLER
vehicle. Twoor morepeopleare neededto * Whengoing down ramps, walk back
A WARNING: Loadingand _othis, wardwiththetillerfollowingyou. Keep
Unloadingthe tiller intoa Theramps must be strong enough to alertfor any obstacles behindyou. Posi-
vehicle ispotentially hazardous support the combined weight of the tiller tion a person at eachwheelto control the
and wedon't recommenddoing andany handlers.Theramps should pro- speedof thetiller. Nevergo down ramps
sounlessabsolutelynecessary, videgoodtraction to preventslipping; they tiller-first, as thetiller could tip forward.
asthis could result in personal should havesiderails to guidethe tiller * Placewooden blocks onthe downhill
injury or property damage, alongthe ramps;and they should havea side ofthe wheels if you needto stop the
However,if you must load or locking deviceto secure themto the tiller from rolling down the ramp. Also,
unloadthetiller, follow tbe vehicle, usethe blocksto temporarily keepthetiller
guidelinesgiven next. • Thehandlersshouldwearsturdyfootwear inplaceontheramps(ifnecessary),andto
• Beforeloading or unloading,stoptheen_ thatwillhelptopreventslipping, chockthewheelsinplaceafterthetilleris
gine,wait for all parts to stop moving, • Position the loading vehicle sothat the in the vehicle.
disconnect the spark plug wire and letthe rampangle isas flat as possible (the less • After loadingthe tiller, Preventit from
engineand muffler cool. inclineto the ramp, thebetter). Turnthe rolling byengagingthe wheels in the
• The tiller is too heavyand bulky to lift vehicle'sengine off and apply its parking WHEELDRIVEposition. Chockthe wheels
safelyby one person.Two or more people brake, with blocksandsecurelytie thetiller down.
should sharethe load. • Whengoing up ramps, stand inthe
normal operating position and pushthe
16
SECTION5: MAINTENANCE
WARNING: Before
inspecting, cleamngor serwcmg
the machine,shut off engine.
wait for all moving partsto come
to a completestop, disconnect
spark plug wire andmove wire
awayfrom spark plug. Remove
ignition keyon electricstart
models.
Failuretofollow these
instructions canresult in serious
personalinjury or property
damage.
MAINTENANCESCHEDULE
PROCEDURE
Checkmotoroil level
Cleanengme
Checkdrivebelttension
Checknutsandbolts
Changemotoroil
Lubricatetiller
Serviceengineaircleanersystem
CheckgearoL]levelin transmission
Checktinesfor wear
Checkair 3ressurein tires
(EfunithaspneumatLctLresj
Servicesparkplug
NOTES
MOTES
2.3
2.7
A
4
4.6.9
4
7
5
5
5
1- CheckafterBrst2hoursofbreak-inooeranon
2 - Before eachuse.
3 - Every5 operating hours.
4 - E[ _ry10 opera_mghours,
5- Every3Oonerannghours,
6 - Changemore frequem/y m ousrj cona/[/ons.
7 - See EngineOwner's Manual for service
recommeearlons,
8- Whichevertime interval occurs first
9- Changeafterfirst2hoursofbreak-in
TILLER LUBRICATION
Afterevery10operatinghours,oilor
greasethelubricationpointsshownin
Figure5-1anddescribed below.
Usecleanlubricating oil (#30weight motor
oil is suitable) and cleangeneralpurpose
grease(greasecontaining a metallubricant
is preferred, if available).
• Removethewheels,cleanthewheelshaft
(A, Fig. 5-1) and apply athincoating of
greasetOthe wheelshaft.
• Greasethe back,front and sides ofthe
depth regulator lever(B, Fig. 5-1).
• Removethe tines andcleanthe tineshaft
(C, Fig.5-1). Use a file or sandpaperto
gently remove anyrust, burrs or rough
spots (especiallyaround holes in shaft).
Applygreaseto endsof shaft beforeinstall-
ing tines.
• Oilthe threads onthe handlebarheight
adjustment screws andthe handlebar
If a cover is leaking, checkfor loose
screws. If the screws aretight, a new
gasket or oi!seal may be required.
If the leakisfrom around ashaftand oil
seal, the oil seal probably needsto be
replaced. Seeyour authorizeddealeror
contact the factory for serviceor advice.
IMPORTANT:Neveroperatethe tiller if
the transmission is low on oil. Check
the oil levelafter every30 hours of
operationand wheneverthere isany oil
leakage.
CHECKHARDWARE
Checkfor looseor missing hardwareaf-
ter every 10 operatinghoursand tighten
or replace(as needed)beforereusing
tiller
Besureto checkthe screws underneath
thetiller hoodthat securethetransmis-
sioncoverandthe DepthRegulatorLever
to thetransmission.
attaching screws (D, Fig.5-1). CHECKTIREPRESSURE
(Models with pneumatic tires)
Checktheair pressurein bothtires. The
air pressure should be between15 PSI
and 20 PSI(pounds per squareinch).
Keepbothtires equally inflatedto help
prevent machinefrom pulling to one
side.
TRANSMISSION
GEAROILSERVICE
Figure5.1
CHECKFOROILLEAKS
Beforeeachuse,checkthetiller for signs of
an oil leak-- usually a dirty, oily accumu-
lationeither on the unit or on the floor.
A little seepagearound a cover oran oil
sealis usually not a causefor alarm. How-
ever,if the oil drips overnight, then imme-
diateattention is needed.Ignoring anoil
Checkthetransmission gear oil level
after every 30 hoursof operationor
wheneveryou noticeany oil leak. Oper-
ating thetiller whenthe transmission is
low on oil can result in severedamage.
A. ToChecktheTransmission
GearOil Level:
1. Checkthe gearoil levelwhenthe
transmission is cool. Gear oil will
expandin warm operatingtemperatures
andthis expansion will providean incor-
rect oil level reading.
2. With thetiller onlevelground, pullthe
Depth RegulatorLeverall the way up.
3. Removethe oil fill plug (A, Fig.5-2)
leakcanresult in severe transmission from thetransmission housingand look
damage] insidethe oil fill holeto locate the main
drive shaft situated belowthe hole.
17
WARNING: Beforeinspecting, cleaningor servicingthe machine,shut off engine,wait for all
moving partsto come to a completestop, disconnectspark plugwireand movewireawayfrom
spark plug. Failureto follow these instructions can resultin seriouspersonalinjury orproperty
damage.
4. Thegear oil levelis correct ifthe gear
oil isapproximately halfwayupthe side of
the maindrive shaft.
5. If the gearoil levelis low. add gearoil
asdescribed next. If the gearoil levelis
okay,securely replacethe oil fill plug.
IMPORTANT:Donot operatethe tiller ifthe
gear oil levelis low. Doingso will result in
severedamageto the transmission com-
ponents.
Figure5-2: Removeoilfillplug(.4)tocheck
gearoil levelandteaddgearoil. Remove
fourcoverscrews(B)todraingearoil.
B. ToDrainthe TransmissionGearOil: BOLOTINES
Thetransmission gear oil doesnotneedto Thebold tines will wearwith useand
bechangedunless it hasbeencontaminat- should be inspectedat the beginning of
ed with dirt sand or metal particles, eachtilling seasonand after every30 oper-
1. Draingasolinefrom thefuel tank or run ating hours. Thetines can bereplacedel-
the engine untilthe fuel tank is empty.See ther individually or as acomplete set. See
"DANGER"statement below.
WARNING: Gasolineis
highlyflammableandits vapors
are explosive. Followthese
safety practicesto prevent
personalinjury or proper_y
damagefrom fire or explosion.
,, Allowthe engineandmufflerto coolfor
at least twominutesbeforedrainingthe
tiger's gasolinetank.
• Do not allow open flames, sparks,
matchesor smokinginthe area.
• Wipe awayspills and pushtiller away
from spilledfuel.
• Use only an approvedfuel container
the Parts Lisl pagesfor tine identification
and part numbers.
A. Tine Inspection:
With use the tines will becomeshorter.
narrower and pointed. Badlyworn tines
will result in a loss of tilling depth, andre-
ducedeffectivenesswhen chopping up
andturning under organic matter.
B. Removing4nstallinga SingleTine:
1. With the engineshut off and the spark
plug wire disconnected removethe two
screws IA,Figure5-3), IockwahersIE)and
nuts (B) that attach a singletine to a tine
holder. If needed,use penetratingoil on
the nuts.
andstoreitsafelyoutofthereachofchil- 2. Wheninstalling a singletine. besureto
position it so that itscuttmg edge (sharp)
will enter thesoil first as the tiller moves
forward.
6. If adding onlya few ouncesof gear oil.
useAPI ratedGL-4or GL-5gearo11having
a wscosEtyof SAE140. SAE85W-140 or
SAE8OW-90. If refilling an empty trans-
mzsszon,useonly GL-4gear o11havinga 2. Drainthe oil from the engine.
viscosity of SAE85W-140 or SAE140. 3. Removefour screws(B,Figure5-2) and
IMPORTANT:Do not useautomat=ctrans- removetransmissioncoverandgasket.
mission fluid or motor oil inthe transmis- 4. Removethe left-side wheel.
dren.
• Donotstore gasolinein anareawhere
its vaporscouldreach an openflame or
spark, or where ignition sources are
present (such as hot water and space
heaters, furnaces, clothes dryers,
stoves,electricmotors,etc.)
5. Tiltthe left-side wheelshaft into a drain
panand allowthe gearoil to drainthrough
thetop of thetransmission.
6. Reinstallthe wheel.
7. Install a new gasket(do not reuseold
sion.
7. While checkingfrequently to avoid
overfilling, slowly add gear oil into the oil
fill holeuntil it reachesthehalfwaypointon
thedrive shaft.
8. Securely replacethe oil fill plug.
C. Removing4nstallinga TineAssembly:
1. A tine assemblyconsists of eighttines
mounted on atine holder.
2. If removing bothtine assemblies mark
them "left" and "right" beforeremoval.
Removethe screw (C, Figure5-3), lock
washer (E_and Iocknut (D/that securethe
tineassembly to the tine shaft. If neces-
sary,usea rubber malletto tapthetine as-
sembly outward off the shaft.
3. Beforereinstalling thetine assemo_y,in-
spectthetineshaftfor rust. roughspots or
burrs. Lightly file or sand.as needed.Ap-
ply athin coat of greaseto the shaft.
gasket and reinstallthetransmission coy- 4. Install eachtineassembly so that the
er. cutting (sharp) edgeof the tines will enter
8. Refillthetransmission usingGL-4 gear thesoilfirstwhenthetillermovesforward.
oil ,SAE85W-140 or SAE140L Securethe tine assemblyto the tine shaft
9. Refillthe engine with motor oiland re- using thescrew and Iocknut
plenishthe fuel tank with gasoline.
18
WARNING: Beforeinspecting, cleaningor servicingthe machine,shut off engine,wait for all
moving partsto come to a completestop, disconnectspark plugwireand movewireawayfrom
spark plug. Failureto follow these instructions can resultin seriouspersonalinjury orproperty
damage.
C
FRONT/
FORWARD
b Unthreadthe hexnut IC, Figure5-4)
halfway upthe adjustment screw (D_.
c. Unhookthe top of the spring from
the Forward ClutchBail.
d. Usepliersto preventtheadjuster _B_
from turning and turn the slotted screwlo-
cated insidethe spring clockwise _viewed
from operator'spositiom to increaseten-
sion on the spring. Turnthe screw coun-
terclockwise to decreasetension. Once
adjusted,reattachthe spring to the For-
ward Clutch Ba_L
e. RepeatSteps2and 3to re-measure
thelengthofthespring. Whenthe second
measurementis between1/16"-to- 3/16"
longerthanthefirst measurement,retighten
thehexnut(C)againstthetopoftheadjuster
_B/.
Figure5-3: Installtinessothatcuttingedgenftinesentersoilfirstwhentillermovesforward,
CHECKINGANDADJUSTING
FORWARDDRIVEBELTTENSION
It is importantto maintain correct tension
on the forward drive belt. Aloose beltwill
causethetinesandwheelsto slow down--
or stop completeiy i eventhough the en-
gine _srunning atfull speed. A too tight
belt canresult in unintentional tine move-
ment whenthe clutch _ailis in the Neutral
_releasedlposition.
• Checkbelttension after the first two
hoursof break-inoperationandafter every
10operating hours.
• At the end of eachtilling season,check
the beltfor cracks,cuts or frayed edges
and replaceit assoon as possible.
ToCheckForwardBeltTension:
1. Stop engine,wait for all partsto stop
mowng anddisconnect spark plug wire
2. With the ForwardClutchBailinan open
(releasedl pos_t_on,measureand notethe
overalllengthofthecablespring (A,Figure
5-4) bymeasuringfrom the outermost coil
to the outermost coil.
3. Squeezethe ForwardClutch Ba
againstthe handlebar(seeFigure5-4) and
ReplacementBelt Information
If the drive belt needsto be replaced,see
belttension is correct if this second mea- your localauthorized dealeror referto the
suremenl is between1/6"-to- 3/16"longer Parts List for ordering information. Use
than the first measurement, only afactory-authorized beltasan "over-
4. If the spring Lstoo short tless than 1/ the-counter" belt may not perform satis-
16'3.thetension istoo loose. If the spring factorily. The procedurerequiresaverage
is too long _morethan 3/16"_.the tension mechanicalability andcommonly available
tools.
is too tight.
5. Toadjust the length of the spring:
a. Releasethe Forward ClutchBail.
Figure5-4: Tocheckforwardbelt tension,taketwomeasurementsof the
overalllengthofthe coilsin thespring-- first withtheclutchbail open,
thenwith theclutchbail closedagainstthe handlebar.
re-measurethe length of the coils. The
19
WARNING: Beforeinspecting, cleaningor servicingthe machine,shut off engine,wait for all
moving partsto come to a completestop, disconnectspark plugwireand movewireawayfrom
spark plug. Failureto follow these instructions can resultin seriouspersonalinjury orproperty
damage.
FORWARD CLUTCH
BAIL ADJUSTMENT
If the ForwardClutch Bail doesnot func-
tion properly,first checkthat theforward
drive belt is adjusted properly (seeCheck-
ing andAdjusting ForwardDrive Belt Ten-
sion). If this fails to correct the problem,
contact Troy-Bilt LLCor your authorized
dealerfor serviceadvice.
CHECKINGANDADJUSTINGRE-
VERSEDRIVEBELTTENSION
(Models634F/634B only)
It is importantto maintain correct tension
on the reversedrive belt. Aloosebeltwill
causethetines andwheelsto slow down-
or stop completely - eventhough the en-
gine is running atfull speed.
Whencheckingbelttension,alsocheckthe
beltfor cracks, cuts or frayed edgesand
replaceit as soonas possible.
• Checkbelttension after thefirst two
hoursof break-inoperationandafter every
10 operating hours.
ToCheckReverseBelt Tension:
1. Stopengine, wait for all parts to stop
moving anddisconnect spark plug wire.
2. Removescrew in plasticbelt coverand
slide beltcover (which is attachedto for-
ward clutch cable)out of the way.
3. Havean assistant pullthe Reverse
Clutch Control knoball theway out and
hold it in that position. Measurethe length
of the cablewire betweenthe end of the
threadedcableadjuster (A,Figure5-5) and
theend of theZ-fitting (B) to which the ca-
ble wire is attached.
4. Thebelttension isidealifthe cablewire
lengthmeasuresbetween1/8"to 1/4". If it
is lessthan 1/8"(and if thereisno reverse
actionwhenthetiller isrunning),then make
thefollowing adjustments
NOTE:Ifthelengthis morethan 1/4",noad-
justment isneeded--as long asthereverse
actionfunctions properly.
5. Releasethe ReverseClutch Control
knob.andthen unthreadthe inner jam nut
(C, Figure5-6) oneto two turns. Pull the
threadedcableadjuster (A, Figure5-6) to
the left until the inner jam nut (C)touches
the bracket.
6. Preventtheinner jam nut (C)from turn-
ing and tighten the outer jam nut (D)
againstthe bracket. Preventthe outerjam
nut (D) from turning and tighten the inner
jam nut (C) againstthe bracket.
7. Measurethe gap by repeatingStep3.
Readjustas neededby repeatingSteps 5
and 6.
8. Reinstallthe belt cover.
Figure5-5: Measurecablewirelengthto
checkforcorrectreversebelttension.
Figure5-6: Movethreadedadjuster(,4)toleft
toincreasebelttension.
ReplacementBelt Information
If the drive belt needsto be replaced,see
your localauthorized dealeror referto the
Parts List for ordering information. Use
only a factory-authorized belt asan "over-
the-counter" belt may not perform satis-
factorily. The procedurerequiresaverage
mechanicalability andcommonly available
tools.
ENGINECLEANING
Keepingthe enginecleanwill helpto en-
suresmooth operationand preventdam-
agefrom overheating. Referto theEngine
Owner'sManualfor engine cleaningser-
vice intervals and instructions. Besure
thatthe muffler iscool beforeservicingthe
engine.
AIRCLEANERSERVICE
Theair cleanerfilters dirt and dust out of
theair before it enters the carburetor. Op-
eratingthe enginewith a dirty, cloggedair
filter can causepoor performanceand
damageto the engine. Neveroperatethe
enginewithout theair cleanerinstalled. In-
spectand servicethe air cleanermore of-
ten if operating in very dusty or dirty
conditions. Referto the engine Owner's
Manualfor air cleanerserviceintervalsand
instructions.
ENGINEOILSERVICE
Checkthe engineoil levelbeforeeachuse
andafter everyfive hours of continuous
operation. Running theengine when it is
low on oil will quickly ruin theengine.
It is recommendedthat youchangethe
motor oil after every 10hours of operation
and evensoonerwhen operating in ex-
tremelydirty or dusty conditions. Referto
the EngineOwner'sManualfor detailed
service instructions.
A. ToChecktheEngineOil Level:
1. Parkthe tiller on a levelareaand shut
off the engine.
2. Levelthe engine(usethe Depth Regu-
lator Leverto adjust the engineangle).
2O
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