Walker PERFAERATORTM PA6685 User manual

OWNER’S MANUAL

Safety, Assembly, Operating, and Maintenance Instructions

and ILLUSTRATED PARTS MANUAL

PA6685 PERFAERATOR™ Attachment

Please Read and Save These Instructions Effective Date: 02-01-05

For Safety, Read All Safety and Operation P/N 6600-1

Instructions Prior to Operating Machine

™

Foreword

Thank you. . .for purchasing a Walker PERFAERATOR™. Every effort has been made to provide

you with the most reliable product on the market, and we are sure you will be among our many sat-

isfied customers. If for any reason this product does not perform to your expectations, please con-

tact us at (970) 221-5614. Every customer is important to us. Your satisfaction is our goal.

Please. . .read this manual thoroughly! This manual is to be used in conjunction with the mower

owner’s manual and the engine manufacturer’s manual for the specific engine on the mower model

you are using. Before you operate your new implement, please read this entire manual. Some of

the information is crucial for proper operation and maintenance of this product - it will help protect

your investment and ensure that the implement performs to your satisfaction. Some of the informa-

tion is important to your safety and must be read and understood to help prevent possible injury to

the operator or others. If anything in this manual is confusing or hard to understand, please call our

service department, at (970) 221-5614, for clarification before operating or servicing this product.

This manual covers the Model PA6685 PERFAERATOR™ attachment.

All shields and guards must be in place for the proper and safe operation of this aerator.

Where they are shown removed in this manual, it is for illustration purposes only. Do not operate

this product unless all shields and guards are in place.

Specifications given are based on the latest information available at the time this manual was pro-

duced.

Walker Mfg. Co. is continually striving to improve the design and performance of its products. We

reserve the right to make changes in specifications and design without thereby incurring any obli-

gation relative to previously manufactured products.

Sincerely,

WALKER MANUFACTURING COMPANY

Bob Walker, President

Table of Contents

1

Owner’s Manual

General Information________________ 2

HIGHLIGHTED INFORMATION _____________ 2

GLOSSARY ____________________________ 2

IDENTIFYING NUMBER LOCATIONS________ 2

SERVICING OF DRIVETRAIN GEARBOX ____ 2

Specifications _______________________ 3

PERFORMANCE ________________________ 3

DIMENSIONS ___________________________ 3

CONSTRUCTION ________________________ 3

DRIVE SYSTEM _________________________ 3

TIRE/WHEEL SIZE _______________________ 3

Component Identification___________ 4

Safety Instructions __________________ 5

BEFORE OPERATING____________________ 5

OPERATING____________________________ 6

MAINTENANCE _________________________ 7

SAFETY, CONTROL,

AND INSTRUCTION DECALS ______________ 8

Assembly Instructions ______________ 9

SETUP INSTRUCTIONS __________________ 9

Lift Lever Installation___________________ 9

Installation on Tractor __________________ 9

Operating Instructions______________10

CONTROL IDENTIFICATION,

LOCATION, AND FUNCTION _____________ 10

Tractor Controls _____________________ 10

Lift Lever ___________________________ 10

Foot Trigger _________________________ 10

STARTING THE MACHINE _______________ 11

ENGAGING THE AERATOR ______________ 11

Normal Operation ____________________ 11

RECOMMENDATIONS FOR AERATING ____ 11

STOPPING THE MACHINE _______________ 12

Maintenance Instructions___________12

LUBRICATION_________________________ 12

Grease Fitting and Oil Point Lubrication__ 12

Gearbox ____________________________ 12

Drive Chain__________________________ 12

Lifting Mechanism____________________ 13

Camshaft Drive System _______________ 13

PTO U-Joint _________________________ 13

ADJUSTMENTS________________________ 13

Drive Chain Tension __________________ 13

Tine Ends ___________________________ 14

REPLACING/REPAIRING ________________ 14

Tine Ends ___________________________ 14

REMOVAL ____________________________ 14

END OF SEASON STORAGE _____________ 14

Maintenance And Service

Record Sheet

________________________15

Illustrated Parts Manual

LUBRICATION POINTS__________________ 16

BODY AND FRAME COMPONENTS _______ 18

CONTROL LINKAGE____________________ 20

POWER TRANSMISSION COMPONENTS___ 22

Maintenance And Service

Record Sheet

________________________24

Warranty

____________________________25

2

General Information

HIGHLIGHTED INFORMATION

Walker Manufacturing recommends that any service

requiring special training or tools be performed by

an authorized Walker Mower Dealer. There are sev-

eral general practices to be aware of in the area of

safety. Most accidents associated with the oper-

ation or maintenance of a Walker product are

caused by disregarding basic safety precautions or

specific warnings. Such accidents, in most cases,

can be prevented by being aware of the dangers

present.

Information of special importance has been high-

lighted in bold type in this manual. Refer to Safety

Instructions for the meanings of DANGER, WARN-

ING, CAUTION, IMPORTANT, and NOTE.

GLOSSARY

There are many terms that are either unique to this

equipment or that are used as acronyms. The fol-

lowing terms and their definitions will help while us-

ing this manual:

• FORWARD SPEED CONTROL (FSC) controls

the maximum forward speed of the tractor; func-

tioning as a cruise control.

• LEFT HAND (LH) refers to the left-hand side of

the tractor when the operator is seated facing

forward in the tractor seat.

• MACHINE consists of the implement installed

on the tractor, functioning as a single unit.

• POWER TAKE-OFF (PTO) transmits engine

power to run the PERFAERATOR™.

• RIGHT HAND (RH) refers to the right-hand side

of the machine when the operator is seated fac-

ing forward in the tractor seat.

• TRACTOR is the prime mover, including the en-

gine, drivetrain, operator seat, and controls to

operate the implement.

IDENTIFYING NUMBER LOCATIONS

The PERFAERATOR™ serial number is affixed to

RH side of the inside of the unit housing. Model and

serial numbers are helpful when obtaining replace-

ment parts and maintenance assistance. For ready

reference, please record these numbers in the

space provided.

Fill In By Purchaser

Aerator Serial Number Location

SERVICING OF DRIVETRAIN GEARBOX

Detailed servicing and repair of the gearbox used on

the PERFAERATOR™ is not covered in this manu-

al. Only routine maintenance and general service

instructions are provided. For the service of the

gearbox during the limited warranty period, it is im-

portant to find a local, authorized servicing agent of

the component manufacturer. Any unauthorized

work done on these components during the warran-

ty period may void the warranty. If you have any

difficulty finding an authorized outlet or obtaining

warranty service, please contact our Service De-

partment for assistance:

Walker Manufacturing Company

5925 E. Harmony Road

Fort Collins, CO 80528

1-970-221-5614

Gearbox manufacturer's information is:

Bondioli & Pavesi

10252 Sycamore Drive

Ashland, VA 23005-8137

804-550-2224

Serial

Number Plate

PERFAERATOR™ Model No. ______________

PERFAERATOR™ Serial No. _______________

PA6685

Specifications

3

MODEL PA6685 AERATOR

PERFORMANCE

Aeration Width 41-1/2 in. (105 cm)

Core Spacing 3.63 x 6 in. (9.22 x 15.25 cm)*

Coverage per Hour 60,000 sq. ft. (5574 sq. meters)

Coring Depth Up to 2.50 in. (6.35 cm)

DIMENSIONS

Weight 365 lb (136 kg)

Height 23-1/4 in. (59 cm)

Width 48-5/8 in. (123 cm)

Length 42-3/4 in. (109 cm)

CONSTRUCTION

Frame All Welded Unitized Frame

Housing 11 & 14 Gauge Welded Steel

Number of Tines 12

Tine Construction Machined, High Carbon, Heat-Treated Steel work in Line

as a Camshaft

DRIVE SYSTEM

PTO Drive Tractor PTO Drive Shaft/2 High-Speed U-Joints, Right

Angle Gearbox Drives Chain to Camshaft

TIRE/WHEEL SIZE

Deck Caster Wheel Pneumatic 11 x 4.00-5

Roller Wheel 3-7/8 in. (9.84 cm)

* This measurement may vary depending on ground speed

Component Identification

4

NOTE: Control Identification

shown in Operating

Instructions section.

Foot

Trigger

Plastic

Wheel

PTO

Shaft

Mounting

Tube

Ground

Speed

Indicator

Protective

Cover

Lift

Lever

Protective

Cover

Plastic

Wheel

PTO

Gearbox

PTO

Shaft

Cover

Chain

Guard

Footrest

PERFAERATOR™ Top View (Not Installed)

Safety Instructions

5

Pay particular attention to any information labeled

DANGER, WARNING, CAUTION, IMPORTANT,

and NOTE in this manual.

When you see the Safety Alert Symbol ( ),

read, understand, and follow the instructions. Fail-

ure to comply with safety instructions may result in

personal injury.

The seriousness or degree of importance of each

type of information is defined as follows:

IMPORTANT: Identifies mechanical information de-

manding special attention, since it deals with the pos-

sibility of damaging a part or parts of the machine.

NOTE: Identifies information worthy of special

attention.

Walker Manufacturing cannot predict every poten-

tially dangerous situation. Therefore, items labeled

as such in this manual do not cover all conceivable

situations. Any person using procedures, tools, or

control techniques not recommended by Walker

Manufacturing must take full responsibility for safety.

The PERFAERATOR™ has been designed with

many safety features to protect the operator from

personal harm or injury. However, it is necessary

for the operator to use safe operating procedures at

all times. Failure to follow safety instructions

contained in this manual may result in personal

injury or damage to equipment or property.

If you have any questions concerning setup, op-

eration, maintenance, or safety, please contact

your authorized Walker Mower Dealer or call

Walker Manufacturing Company at (970) 221-

5614.

BEFORE OPERATING

1. Read and understand the contents of this

OWNER’S MANUAL before operating the

machine. Become thoroughly familiar with all

controls and how to stop the machine and dis-

engage the controls quickly. Replacement

Owner's Manuals are available by sending the

Model and Serial Number to:

Walker Manufacturing Company

5925 East Harmony Road

Fort Collins, CO 80528

2. Never allow children to operate or give rides

on the machine. Do not allow adults to oper-

ate without proper instruction.

3. Do not allow anyone other than the operator on

the machine.

4. Keep everyone, especially children and pets, a

safe distance away from the area being aerated.

Do not operate with bystanders in the area.

5. Do not operate the machine wearing sneakers,

tennis shoes, or similar lightweight footwear.

Wear substantial protective footwear that

will improve footing on slippery surfaces.

6. Ground cover or leaves can sometimes hide ob-

jects that might cause damage to the aerator.

Clear the area of objects and mark all sprinkler

heads and/or utility box covers.

DANGER

An IMMEDIATE hazard that WILL result in

severe personal injury or DEATH, if warn-

ing is ignored and proper safety precau-

tions are not taken.

WARNING

A POTENTIAL hazard that COULD result in

severe personal injury or DEATH, if warn-

ing is ignored and proper safety precau-

tions are not taken.

CAUTION

Possible hazards or unsafe practices that

MAY result in MODERATE personal injury

or property damage, or machine damage, if

warning is ignored and proper safety pre-

cautions are not taken.

Safety Instructions

6

7. Do not wear loose fitting clothing that could get

caught in moving parts. Always wear ade-

quate protective clothing including long

pants. Wearing safety glasses, safety shoes,

and a helmet is advisable and required by some

local ordinances and insurance regulations.

8. Prolonged exposure to loud noise can cause

impairment or loss of hearing. Operator hear-

ing protection is recommended. Wear a suit-

able hearing protective device, such as

earmuffs or earplugs.

9. Keep all protective shields and safety devic-

es in place. If a protective shield, safety de-

vice, or decal is damaged, unusable, or

missing, repair or replace it before operating the

machine.

10. Be sure any interlock switches are function-

ing correctly so the engine cannot be started

unless the Forward Speed Control lever is in the

NEUTRAL position and the PTO clutch is in the

DISENGAGED position. Also, the engine

should stop if the operator lifts off the seat with

the PTO clutch in the ENGAGED position.

11. Never attempt to make any adjustments

while the engine is running, except where

specifically instructed to do so.

12. Handle gasoline or diesel fuel with care.

Gasoline is highly flammable and its vapors are

explosive:

a. Use an approved fuel container.

b. Never add fuel to a running engine or hot

engine (allow hot engine to cool several

minutes).

c. Keep matches, cigarettes, cigars, pipes,

open flames, or sparks away from the fuel

tank and fuel container.

d. Always fill the fuel tank outdoors using care.

Fill to about one inch from the top of the tank.

Use a funnel or spout to prevent spilling.

e. Replace the machine fuel cap and container

cap securely and clean up any spilled fuel

before starting the engine.

OPERATING

NOTE: Refer to the Walker Rider Lawnmowers

OWNER’S MANUAL for safety instructions for

operating the tractor.

1. Operate the machine only in daylight or in good

artificial light with good visibility of areas being

aerated.

2. Sit on the seat when starting the engine and op-

erating the machine. Keep feet on footrests at

all times when the tractor is moving and/or the

implement is operating.

3. An inexperienced operator should learn to

steer (maneuver) the tractor with a slow en-

gine speed before attempting any operating.

Be aware that, with the front mounted implement

configuration, the back of the machine swings to

the outside during turns.

4. Remember, for an emergency stop, the forward

motion of the tractor can always be stopped by

pulling the Forward Speed Control (FSC) into

the NEUTRAL-PARK position.

5. Disengage the PTO clutch and put the FSC in

the NEUTRAL-PARK position before starting

the engine (an ignition interlock switch normally

prevents starting of the tractor if these controls

are in the OPERATING position).

6. Do not run the engine in a confined area

without adequate ventilation. Exhaust fumes

are hazardous and can be deadly.

7. Do not carry passengers - maximum seating

capacity is one (1) person.

8. Make sure the tines are clear of debris before

engaging the PTO clutch.

9. Be careful never to allow anyone in front of the

implement.

10. Clear area of loose objects and all children.

Flag sprinkler heads and other hidden obsta-

cles. Walk the entire area before aerating for

possible holes.

9. Avoid sudden starts or stops. Before backing

the machine up, disengage the PTO, retract

tines and look to the rear to be sure no one is

behind the machine. Watch carefully for traffic

when crossing or working near roadways.

Safety Instructions

7

12. Disengage the PTO clutch when transporting

the machine.

13. Do not operate across the face of slopes. Use

extreme caution when changing direction on

slopes.

14. Never adjust tine depth with the engine run-

ning. Before adjusting tines or servicing, disen-

gage the PTO clutch, stop the engine, and

remove the ignition key. Wait for all movement

to stop before getting off the seat.

NOTE: The PTO brake should normally stop

drive line rotation within 5 seconds of disengag-

ing the PTO clutch.

15. Do not operate the aerator with the covers open.

16. If the aerator tines do not move when the PTO

is engaged:

a. Disengage the PTO clutch, stop the engine,

and remove the ignition key before leaving

the seat.

b. LOOK to make sure PTO shaft and the tine

movement has stopped before servicing

any area of the machine.

c. Disconnect the fuel solenoid wire [diesel en-

gines] or spark plug wire(s) [gasoline en-

gines].

17. If the implement strikes a solid object or the ma-

chine begins to vibrate abnormally, immediate-

ly disengage the PTO clutch, stop the

engine, and wait for all moving parts to stop.

Disconnect the fuel solenoid wire [diesel en-

gines] or the spark plug wire(s) [gasoline en-

gines] to prevent accidental starting.

Thoroughly inspect the implement and repair

any damage before restarting the engine and

operating the machine. Make sure implement

components are in good condition and all bolts

are tight.

18. Do not touch the engine or muffler while the

engine is running or immediately after stop-

ping the engine. These areas may be hot

enough to cause serious burns.

19. When leaving the machine unattended, disen-

gage the PTO clutch, stop the engine, and re-

move the ignition key.

MAINTENANCE

NOTE: Refer to the Walker Rider Lawnmow-

ers OWNER’S MANUAL for proper tractor

maintenance procedures.

1. To prevent accidental starting of the engine

when servicing or adjusting the machine, re-

move the key from the ignition switch and dis-

connect the fuel solenoid wire [diesel engines]

or the spark plug wire(s) [gasoline engines].

2. To reduce fire hazards, keep the engine free of

grass, leaves, excessive grease, and dirt.

3. Keep all nuts, bolts, and screws tight to ensure

the machine is in a safe, working condition.

4. Perform only maintenance instructions de-

scribed in this manual. Unauthorized mainte-

nance operations or machine modifications

may result in unsafe operating conditions.

5. If the engine must be running to perform a main-

tenance adjustment, keep hands, feet, and

clothing away from moving parts. Do not

wear jewelry or loose clothing.

6. Always use proper engine service manuals

when working on the engine. Unauthorized

maintenance operations or modifications to the

engine may result in unsafe operating condi-

tions.

7. Altering the machine in any manner which ad-

versely affects its operation, performance, dura-

bility, or use will VOID the warranty and may

cause hazardous conditions.

8. Never attempt to disconnect any safety devices

or defeat the purpose of these safety devices.

9. Do not change the engine governor settings or

overspeed the engine. The governor has been

factory-set for maximum-safe engine operating

speed.

10. Use genuine factory replacement parts.

Substitute parts may result in product malfunc-

tion and possible injury to the operator and/or

others.

IMPORTANT: Keep all applicable manuals

immediately accessible to anyone who may

operate or service this machine.

Safety Instructions

8

Door Cover (Walker P/N 6682-9)

SAFETY, CONTROL, AND INSTRUCTION DECALS

Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or

damaged, a replacement should be ordered and installed before putting the machine into operation. The

Decal Part Number is listed below and in the Parts Manual; the Decal Location is shown in the Parts Manual.

PTO Shield (Walker P/N 7822)

Operator Decal (Walker P/N 6682-14)

Speed Indicator (Walker P/N 6681-13)

Assembly Instructions

9

SETUP INSTRUCTIONS

The PERFAERATOR™ is shipped partially assem-

bled. After uncrating, initial setup is required.

NOTE: During the process of unpacking, any dam-

aged or missing parts should be noted and reported

to the delivering carrier immediately (put in writing

within 15 days). The carrier will provide directions

for proceeding with a claim to receive compensation

for damage.

Lift Lever Installation

The lift lever for the camshaft assembly position is

partially assembled. Stand the lift lever upright and

attach the remaining hardware.

Install Lift Lever Handle

(stand upright and insert hardware)

Installation on Tractor

1. Remove the mower deck from the tractor if nec-

essary. Refer to the appropriate Tractor

Owner's Manual.

2. Lightly grease each tractor support arm (2) on

the tractor.

Attach Aerator to Tractor

3. Engage the aerator frame tube sockets on the

tractor support arms. Slide the implement hitch

onto the support arms approximately 3 in. (76

mm).

Connect Driveline Coupler to Tractor PTO

4. Connect the aerator driveline to the tractor PTO

shaft by sliding back the locking collar on the

yoke, then push the yoke over the PTO shaft

until the locking collar snaps back fully. Make

sure the driveline is well secured at both ends.

5. Install the hitch pin through the hole on the end

of each support arm to lock the hitch in place.

Two (2) hitch pins are included in the owner’s

packet of materials.

Lift Lever

DANGER

This shaft turns at very high RPM. If the

collar is not locked to the PTO shaft at the

tractor end, or if the yoke at the aerator

end is not secured properly, the driveline

can fly loose with great force capable of

causing serious injury or death.

Mounting

Tubes

Only use PTO U-Joint

Tube P/N 7275-15

(9.06" OAL)

Operating Instructions

10

CONTROL IDENTIFICATION, LOCATION, AND

FUNCTION

Tractor Controls

Refer to the appropriate Tractor Owner’s Manual for

complete information about tractor operating con-

trols.

Lift Lever

The lift lever is located to the right of the operator up

from the right footrest. The lever is used to raise and

lower the camshaft assembly. Moving the lift handle

forward lowers the aerator drive assembly; moving

it backward raises the aerator drive assembly.

Foot Trigger

The foot trigger is located on the right footrest. The

foot trigger and the lift lever are used together to

raise and lower the aerator drive assembly. Pull the

handle back, press the foot trigger, and hold on to

the lift handle while letting it move forward to

lower the aerator drive assembly.

CAUTION

Before operating the aerator, become fa-

miliar with the location and function of

all operator controls. Knowing the loca-

tion, function, and operation of these

controls is important for safe and effi-

cient operation of the aerator.

Foot Trigger

Lift Lever

Operating Controls

Operating Instructions

11

STARTING THE MACHINE

Refer to the appropriate Tractor Owner’s Manual for

tractor starting and operating procedures.

ENGAGING THE AERATOR

Refer to the appropriate Tractor Owner’s Manual for

tractor starting and operating procedures.

1. Release the tines into the operating position by

pushing on the foot trigger and using the lift

lever to lower the tines.

2. Set the engine throttle at full speed.

3. Begin driving the tractor forward slowly.

4. Pull the PTO clutch lever UP to engage the

aerator.

IMPORTANT: DO NOT engage the PTO clutch

when transporting the machine. DO NOT

engage the PTO clutch with the PTO shaft

disconnected (the aerator removed from the

tractor).

Normal Operation

IMPORTANT: The aerator has a natural driving mo-

tion when engaged, so the speed of the tractor is

critical to ensure proper aeration and longevity of

aerator components.

1. Adjust ground speed to properly position tines

as shown.

IMPORTANT: If ground speed is too fast, the re-

tractor plates will swing away from the front, causing

a shallow plugged hole.

IMPORTANT: If ground speed is too slow, the re-

tractor plates will swing forward and make constant

contact with the front frame, resulting in excessive

wear of tines and retractor plates.

2. If an obstacle is encountered during operation

(sprinkler head, sidewalk, etc.), the PTO can

be disengaged and reengaged after passing

obstacle.

IMPORTANT: Minimum turning radius is 10 feet

(3.05 m). Turning too tight can result in damage to

the turf and the aerator.

RECOMMENDATIONS FOR AERATING

For best results the ground must have a sufficient

amount of moisture to allow the tines maximum pen-

etration.

IMPORTANT: Operate the engine at full speed

when operating the aerator, to allow the engine to

produce full horsepower and to increase efficiency

of the engine cooling system.

• Do not drive the mower backwards with the

aerator in the down position--it may cause

severe turf damage.

• Driving the tractor too slow may cause turf

damage.

CAUTION

ALWAYS disengage the PTO clutch and

put the FSC in the NEUTRAL-PARK posi-

tion before starting the engine.

CAUTION

A safety interlock switch (seat switch)

will cause the engine to stop if the PTO

clutch is engaged and the operator is not

in the seat. The function of this switch

should be checked by the operator rais-

ing off the seat and engaging the PTO

clutch; the engine should stop. If the

switch is not working, it should be re-

paired or replaced before operating the

aerator. DO NOT disconnect the safety

switches; they are for the operator’s pro-

tection.

Adjust Ground Speed As

Indicated By Decal

Lubricate Grease

Fitting On Cam

Rings (12 Fittings)

Every 4 Hours

Operating Instructions Maintenance Instructions

12

• Driving the tractor too fast will make aeration

holes appear less frequently and too shallow

(short plugs) may do a less than desirable job.

• Do not engage the PTO with the drive

assembly in the transport position.

STOPPING THE MACHINE

1. Disengage the PTO clutch.

2. Pull the steering levers to the NEUTRAL

position and then move the FSC lever

backward to the NEUTRAL-PARK position.

3. Slow the engine to idle; put the throttle in the

IDLE position.

4. Retract the tines into the transport position

using the lift lever.

4. Turn the ignition switch OFF.

5. Engage the parking brake.

IMPORTANT: The hydrostatic transmissions

lock to prevent the machine from rolling freely

with the engine stopped. However, if the

machine is parked on a slope, it is necessary to

ENGAGE the parking BRAKE to prevent the

machine from creeping. This is due to a small

amount of slippage in the hydrostatic transmis-

sions, especially when transmission fluid is

warm.

LUBRICATION

Grease Fitting and Oil Point Lubrication

Lubricate the grease fittings and oil points after ev-

ery 8 hours of operation (or as recommended be-

low). Use SAE general purpose lithium or

molybdenum base grease for grease fittings and

light machine oil (SAE 10) to lubricate oil points.

Gearbox

The gearbox is permanently lubricated (oil filled) and

sealed requiring no scheduled lubrication. How-

ever, the gearbox oil seal(s) should be checked ev-

ery 25 hours for indication of an oil leak. If gearbox

oil is changed, fill with 15 oz. of 80W-90 gear oil. Do

not overfill.

Drive Chain

Lubricate the drive chain every 8 hours. A light

penetrating oil or special purpose chain oil is recom-

mended. Lubricate the drive chain as follows:

1. Remove the three (3) screws fastening the

removable chain guard cover to the frame.

Remove Chain Guard Cover

WARNING

A brake stops the machine from free-

wheeling within five (5) seconds after dis-

engaging the PTO clutch. If the brake sys-

tem malfunctions and the machine does

not stop within five (5) seconds, the brake

should be adjusted or repaired before op-

erating the machine. Refer to the appro-

priate Tractor Owner’s Manual for

adjustment procedures.

WARNING

Remove the key from the ignition switch

when leaving the machine unattended.

This will prevent children and inexperi-

enced operators from starting the engine.

WARNING

DO NOT attempt to lubricate the machine

with the tractor engine running. Disen-

gage the PTO clutch, shut off the ma-

chine, and remove the ignition key.

Maintenance Instructions

13

2. Apply oil to the drive chain.

3. Adjust the chain if necessary. Refer to AD-

JUSTMENTS of Drive Chain Tension in this

section.

4. Reinstall chain guard cover by reversing the re-

moval procedure.

Lifting Mechanism

Lubricate the grease fittings (4) across the lifting

mechanism attached to the frame every 25 hours.

Use SAE general purpose lithium or molybdenum

base grease.

Lubricating Lift Mechanism and Camshaft Drive

Camshaft Drive System

Lubricate the grease fittings (16) on the camshaft

drive system every 4 hours. Use Almagard

®

#3752

lubricant (Walker P/N 6685-7). The bearings at

each end and attached to the retractor plate arms

are sealed and should be greased every 100 hours

of operation.

PTO U-Joint

Lubricate the grease fitting for the PTO U-Joint ev-

ery 8 hours with SAE general purpose lithium or

molybdenum base grease.

The PTO U-Joint is accessed by removing the gear-

box cover.

ADJUSTMENTS

Drive Chain Tension

The drive chain should have 1/4 to 1/2 in. (6 to 13

mm) of slack at midspan. Remove the chain guard

cover to check slack. Adjust the drive chain as fol-

lows:

1. Remove the three (3) screws fastening the re-

movable chain guard cover to the frame.

2. Loosen the chain tension block mounting nut

and bolt (see photo below).

3. Position the chain tension block so the chain

has 1/4 to 1/2 in. (6 to 13 mm) of slack.

4. Retighten the chain tension block mounting nut

and bolt.

5. Recheck the drive chain tension.

Drive Chain Adjustment

Lifting

Mechanism

Camshaft

Drive

WARNING

DO NOT attempt to make any adjustments

with the tractor engine running. Disen-

gage the PTO clutch, shut off the machine,

and remove the ignition key. Wait for all

movement to stop before getting off the

seat.

Ref. Chain

Guard

Tension

Block Nut

Maintenance Instructions

14

Proper Drive Chain Tension

Tine Ends

Tine ends are adjustable by using the following pro-

cedure:

1. Loosen the retaining nut on the tine thread and

unscrew tine end to achieve the desired depth.

Open side of tine should be to rear.

IMPORTANT: Do not unscrew the tine ends too

far. The maximum aerating depth is 2-1/2 in.

(6.35 cm).

2. Tighten retaining nut.

Tine End Depth Adjustment

REPLACING/REPAIRING

Tine Ends

Tine ends are replaceable by using the following

procedure:

1. Loosen the retaining nut on the tine thread and

unscrew tine end.

2. Install new tine end by reversing the removal

procedure. Open side of tine should be to rear.

REMOVAL

1. Park the tractor on a level surface with the tines

in the up position.

2. Remove the hitch pins from the ends of the sup-

port arms.

3. Slide the PTO shaft out of the PTO coupler

while sliding the aerator off the tractor support

arms.

END OF SEASON STORAGE

1. Clean the aerator thoroughly.

2. Repainting all parts where paint has worn.

NOTE: Rustproofing or painting every year will

prolong the life of the aerator components and

moving parts.

3. When the aerator is dry, lubricate all moving

parts. Apply lubricant liberally to all surfaces to

protects against rust.

4. Store the aerator in a dry place.

CAUTION

ALWAYS use genuine factory replacement

parts. Substitute parts CAN result in prod-

uct malfunction and possible injury to the

operator and/or others.

1/4 to 1/2 in.

(6 to 13 mm)

Slack at

Midspan

Chain Idler

Tine

Opening

to Face

Rear of

Unit

Retaining

Nut

Tine

Opening

WARNING

DO NOT attempt to make any replace-

ments or repairs with the tractor engine

running. Disengage the PTO clutch, shut

off the machine, and remove the ignition

key. Wait for all movement to stop before

getting off the seat.

WARNING

DO NOT attempt to remove the aerator

from the tractor with the engine running.

Disengage the PTO clutch, shut off the

machine, and remove the ignition key.

Wait for all movement to stop before get-

ting off the seat.

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Walker PERFAERATORTM PA6685 User manual

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