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FD-M780-E

Shimano FD-M780-E, FD-M780, FD-M781, FD-M781-D Service Instructions

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  • What is the purpose of the inner hole cover?
    How do I adjust the height of the front derailleur?
    What is the recommended tightening torque for the wire fixing bolt?
    How do I adjust the top adjustment screw?
    How do I adjust the low adjustment screw?
    What should I do if the chain falls to the crank side?
    What should I do if the chain does not shift smoothly from the intermediate chainring to the largest chainring?
General Safety Information
WARNING
•
Becarefulnottoletthecuffsofyourclothesgetcaughtinthechainwhileriding,otherwiseyoumayfalloffthe
bicycle.
•
Obtain and read the service instructions carefully prior to installing the parts.Loose,wornordamagedparts
maycausethebicycletofalloverandseriousinjurymayoccurasaresult.Westronglyrecommendonlyusing
genuineShimanoreplacementparts.
•
Obtain and read the service instructions carefully prior to installing the parts.Ifadjustmentsarenotcarriedout
correctly,thechainmaycomeoffandthismaycauseyoutofalloffthebicyclewhichcouldresultinserious
injury.
•
ReadtheseTechnicalServiceInstructionscarefully,andkeeptheminasafeplaceforlaterreference.
Note
•
Thisfrontderailleurisfortriplefrontchainwheeluseonly.Itcannotbeusedwiththedoublefrontchainwheel,
astheshiftingpointsdonotmatch.
•
Ifgearshiftingoperationsdonotfeelsmooth,washthederailleurandlubricateallmovingparts.
•
Iftheamountofloosenessinthelinksissogreatthatadjustmentisnotpossible,youshouldreplacethe
derailleur.
•
Whenthechainisinthepositionshownintheillustration,the
chainmaycontactthefrontchainringsorfrontderailleurand
generatenoise.Ifthenoiseisaproblem,shiftthechainontothe
next-largerrearsprocketortheoneafterifthechainisinthe
positionshowninFigure1.Shiftthechainontothenext-smaller
sprocketortheoneafterifitisinthepositionshowninFigure2.
Fig.1 Fig.2
Front
chainrings
Rear
sprockets
•
Forframeswithsuspension,thechainstayanglewillvarydependingonwhetherthebicycleisbeingriddenor
notbeingridden.Whenthebicycleisnotbeingriddenandthechainispositionedonthelargest/largerchainring
andonthesmallestsprocket,thechainguideouterplateofthefrontderailleurmaytouchthechain.
•
Shimanodoesnotprovidethebottombracketmountxingbolts.
•
Forsmoothoperation,usethespeciedoutercasingandthebottombracketcableguide.
•
Partsarenotguaranteedagainstnaturalwearordeteriorationresultingfromnormaluse.
•
FormaximumperformancewehighlyrecommendShimanolubricantsandmaintenanceproducts.
•
Foranyquestionsregardingmethodsofinstallation,adjustment,maintenanceoroperation,pleasecontacta
professionalbicycledealer.
•
BesuretoreadtheserviceinstructionsfortheFrontDriveSysteminconjunctionwiththeseserviceinstructions.
Technical Service Instructions SI-5N30A-001
FD-M780 / FD-M780-E
FD-M781 / FD-M781-D
Frontderailleur
Specifications
X=Available
Modelnumber FD-M780 FD-M780-E FD-M781 FD-M781-D
Normaltype X
Toproutetype X
Frontchainwheeltoothdifference 18T
Min.differencebetweentopandintermediate 10T
Frontderailleurinstallationbanddiameter S,M,L – S,M,L –
Chainstayangle(α) 66°-69°
Applicablechainline 50mm
Applicablefrontchainwheel Fortriplechainwheelonly(42-32-24T)
Installation of the front derailleur
For bracket type
Installasshownintheillustration.
, Tightening torque :
35 - 50 N·m {305 - 435 in. lbs.}
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
FrontChainwheel
FrontDerailleur
Bolt
AdapterAdapter
Note:
Wheninstallingthecomponentstocarbonframe/handlebarsurfaces,verifywiththemanufacturerofthecarbon
frame/partsfortheirrecommendationontighteningtorqueinordertopreventovertighteningthatcancausedamage
tothecarbonmaterialand/orundertighteningthatcancauselackofxingstrengthforthecomponents.
Aftertakinguptheinitialslackinthecable,re-securetothefrontderailleur
asshownintheillustration.
< Normal type > < Top route type >
Pull
Pull
3.
Top adjustment
Setsothattheclearancebetween
thechainguideouterplateand
thechainis0-0.5mm.
Smallest
sprocket
Largest
chainring
Chain position
Chainguide
outerplate
Chain
FD-M780
FD-M780-E
FD-M781
FD-M781-D
Topadjustment
screw
4.
Adjustment of the intermediate
chainring
Whencarryingoutadjustment,setthechain
tothelargestsprocket,andatthefront,set
thechaintotheintermediatechainring.
Adjustusingtheoutercasingadjustment
barrelsothattheclearancebetweenthechain
guideinnerplateandthechainis0-0.5mm.
Chainguide
outerplate
Chain
Largest
sprocket
Intermediate
chainring
Chain position
Chainguideouterplate
5.
Troubleshooting chart
Aftercompletionofsteps1-4,movetheshiftinglevertocheckthe
shifting.(Thisalsoappliesifshiftingbecomesdifcultduringuse.)
Ifthechainfallstothecrankside. Tightenthetopadjustmentscrew
clockwise(about1/4turn).
Ifshiftingisdifcultfromthe
intermediatechainringtothe
largestchainring.
Loosenthetopadjustmentscrew
counterclockwise
(about1/8turn).
Ifshiftingisdifcultfromthe
intermediatechainringtothe
smallestchainring.
Loosenthelowadjustmentscrew
counterclockwise
(about1/4turn).
Ifthechaindoesnotshift
smoothlyfromtheintermediate
chainringtothelargestchainring
eventhoughthetopadjustment
bolthasbeenadjusted.
Turntheoutercasingadjustment
barrelabout1/4ofaturn
counterclockwise.
Ifthechaindoesnotshift
smoothlyfromtheintermediate
chainringtothesmallestchainring
eventhoughthelowadjustment
bolthasbeenadjusted.
Turntheoutercasingadjustment
barrelabout1/4ofaturn
clockwise.
Ifthereisinterferencebetween
thechainandthefrontderailleur
innerplateatthelargest
chainring.
Tightenthetopadjustmentscrew
clockwise(about1/8turn).
Ifthereisinterferencebetween
thechainandthefrontderailleur
outerplateatthelargest
chainring.
Loosenthetopadjustmentscrew
counterclockwise
(about1/8turn).
Iftheintermediatechainringis
skippedwhenshiftingfromthe
largestchainring.
Loosentheoutercasing
adjustmentbarrel
counterclockwise(1or2turns).
Ifthereisinterferencebetween
thechainandfrontderailleur
innerplatewhentherearsprocket
isshiftedtothelargestsprocket
whenthechainwheelisatthe
intermediatechainringposition.
Tightentheoutercasing
adjustmentbarrelclockwise
(1or2turns).
Ifthechainfallstothebottom
bracketside.
Tightenthelowadjustmentscrew
clockwise(about1/2turn).
Iftheleverisstiffwhenshifting
fromtheintermediatechainringto
thelargestchainring.
Loosenthetopadjustmentscrew
counterclockwise(about1/4turn).
Installtheinnerholecoverbyturningitas
shownintheillustrationuntilitstops.
Donotturnitanyfurtherthanthis,
otherwiseitmaydamagethethreadonthe
cover.
Innerholecover
Cutting the outer casing
Whencuttingtheoutercasing,cutthe
oppositeendtotheendwiththemarking.
Aftercuttingtheoutercasing,maketheend
roundsothattheinsideoftheholehasa
uniformdiameter.
Attachthesameouterend
captothecutendofthe
outercasing.
Outerendcap
•
FD-M780 / FD-M780-E
FD-M780-E (Models without BB plate)
Usean8mmspannerora4mmAllenkeytotightenthewirexingbolt.
8mmspanner
< Normal type > < Top route type >
4mmAllenkey
Note:
Passthecablethroughasshown
intheillustration.
Wirexingbolt
•
FD-M781
< Normal type > < Top route type >
5mmAllenkey
Note:
Passthecablethroughasshown
intheillustration.
Wirexingbolt
•
FD-M781-D
< Normal type > < Top route type >
5mmAllenkey
Note:
Passthecablethroughasshown
intheillustration.
Wirexingbolt
Tightening torque :
6 - 7 N·m {52 - 60 in. lbs.}
SI-5N30A-001-00
•
FD-M780 / M781
Installthefrontderailleurasshownintheillustration.
Atthistime,adjustthepositionofthefrontderailleur
whileinstallingitsothatthereisaclearanceof1-3
mmbetweenthechainguideouterplateandthe
maximumouterdiameterofthelargerchainring.
Chainguideouterplate
Clearance:
1 - 3 mm
Pro-Setgauge
Maximumouterdiameter
Pro-Setalignment
block
Settheheightofthefrontderailleur.Theatsection
ofthechainguideouterplateshouldbedirectlyabove
andparalleltothelargestchainring.Secureusinga5
mmAllenkey.
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Chainguide
Chainwheel(largestchainring)
•
FD-M781-D
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
155.5mm*
42T
159.5mm*
42T
155.5mm/159.5mm*
(Frombottombracket
center)
*
Theinstallationheightwillvarydependingonthe
positionoftheframewasher.
Models without BB plate
•
FD-M780-E
Bottombracketmountxingbolt
Note:Shimanodoesnotprovide
thebottombracketmount
xingbolts.
Bottombracket
mount
Bracket
Example:WhenusinganAllenkey
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
SIS Adjustment
Besuretofollowthesequencedescribedbelow.
*
Ifthebicyclehasrearsuspension,rstchecktherecommendedsegmentpositionaccordingtotheowner’smanualfor
thebicycle.Next,useaxingbandorsimilartosettherearsuspensiontotherecommendedstrokefortherear
suspension,andthenadjustthefrontderailleur.
1.
Low adjustment
FirstremovethePro-Setalignmentblock.
Next,setsothattheclearancebetweenthechainguideinnerplateandthe
chainis0-0.5mm.
Chainguide
innerplate
Chain
FD-M781
FD-M781-D
FD-M780
FD-M780-E
Lowadjustment
screw
Pro-Setalignment
block
Largest
sprocket
Smallest
chainring
Chain position
2.
Connecting and securing the inner cable
Switchthemodeconvertertothe3x(triplemode)position,andthencheck
thelowestposition.OperateleverBtwotimesormoretosettheleverto
thelowestposition.Removetheinnerholecover,andinstallthecable.
Mode converter
Modeselectswitch
Note:
Donotforcethemodeselectswitchtoturn.Ifyouforceittoturn,itwill
break.
Innercable
Lever(B)
Innerholecover
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003 Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan
*
ServiceInstructionsinfurtherlanguagesareavailableat:http://si.shimano.com
Pleasenote:specicationsaresubjecttochangeforimprovementwithoutnotice.(English)©Nov.2014byShimanoInc.HTR
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