Shimano FD-M780 Manual

SI-5N30A-001-00
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
Front
generate noise. If the noise is a problem, shift the chain onto
chainrings
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
Rear
Figure 2.
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 fixing bolts.
• For smooth operation, use the specified 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
Specifications
Model number FD-M780
Normal type
Top route type
Front chainwheel tooth difference
Min. difference between top and intermediate
Front derailleur installation band diameter S, M, L
Chainstay angle ( )
a
Applicable chain line
Applicable front chainwheel For triple chainwheel only (42-32-24T)
Installation of the front derailleur
For bracket type
Install as shown in the illustration.
1 2
, Tightening torque :
35 - 50 N·m {305 - 435 in. lbs.}
3 Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Adapter
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 fixing strength for the components.
• 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:
1~3mm
Pro-Set gauge
Maximum outer diameter
Fig.1 Fig.2
Set the height of the front derailleur. The flat
section of the chain guide outer plate should
be directly above and parallel to the largest
chainring. Secure using a 5 mm allen key.
Chainwheel (largest chainring)
Chain guide
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Models without BB plate
• FD-M780-E
Front derailleur
SIS Adjustment
Be sure to follow the sequence described below.
* If the bicycle has rear suspension, first check the recommended segment position according to
X = Available
the owner's manual for the bicycle. Next, use a fixing band or similar to set the rear suspension to
FD-M780-E FD-M781 FD-M781-D the recommended stroke for the rear suspension, and then adjust the front derailleur.
X
1. Low adjustment
X First remove the Pro-Set alignment block.
Next, set so that the clearance between the chain guide inner
18T
plate and the chain is 0 - 0.5 mm.
10T
– S, M, L –
Pro-Set alignment
66° - 69° block
50 mm
2. Connecting and securing the inner cable
Switch the mode converter to the 3x (triple mode) position,
Front Derailleur
and then check the lowest position. Operate lever B two
times or more to set the lever to the lowest position.
Front Chainwheel
Remove the inner hole cover, and install the cable.
Bolt
Adapter
Note:
Do not force the mode select switch to turn. If you force it to
turn, it will break.
• FD-M781-D
Pro-Set alignment
block
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
155.5mm*
42T
• FD-M780 / FD-M780-E
159.5mm*
42T
< Normal type >
155.5 mm / 159.5 mm*
(From bottom bracket
center)
* The installation height will vary depending on the
position of the frame washer.
Bottom bracket mount fixing bolt
Note: Shimano does not provide
the bottom bracket mount
fixing bolts.
Bottom bracket
mount
Bracket
• FD-M781
< Normal type >
Example: When using an Allen key
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
FD-M781
FD-M781-D
FD-M780
FD-M780-E
• FD-M781-D
Chain position
< Normal type >
Largest Smallest
Chain guide
sprocket chainring
inner plate
Chain
Low adjustment
screw
Mode converter
Lever (B)
Inner cable
Inner hole cover
Mode select switch
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
* Service Instructions in further languages are available at : http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English) © Dec. 2010 by Shimano Inc. XBC SZK Printed in Japan.
Install the inner hole cover by turning it
Inner hole cover
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.
Cutting the outer casing
When cutting the outer casing, cut the
opposite end to the end with the marking. 3. Top adjustment
After cutting the outer casing, make the
end round so that the inside of the hole
has a uniform diameter.
Outer end cap
Attach the same outer
end cap to the cut end of
the outer casing.
FD-M780-E (Models without BB plate)
Use an 8 mm spanner or a 4 mm Allen key to tighten the wire
4. Adjustment of the intermediate
fixing bolt.
< Top route type >
8 mm spanner
Note:
Pass the cable through as
shown in the illustration.
Wire fixing bolt
5. Troubleshooting chart
4 mm Allen key
< Top route type >
Note:
Pass the cable through as
shown in the illustration.
5 mm Allen key
Wire fixing bolt
< Top route type >
Note:
Pass the cable through as
shown in the illustration.
5 mm Allen key
Wire fixing bolt
Tightening torque :
6 - 7 N·m {52 - 60 in. lbs.}
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
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
Set so that the clearance
between the chain guide outer
plate and the chain is 0 - 0.5
mm.
Chain position
Top adjustment
FD-M780
screw
Smallest Largest
FD-M780-E
sprocket chainring
Chain guide
outer plate
FD-M781
FD-M781-D Chain
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
inner plate
Chain
Chain position
Largest Intermediate
sprocket chainring
Outer casing adjustment barrel
After completion of steps 1 - 4, move the shifting lever to check the
shifting. (This also applies if shifting becomes difficult during use.)
If the chain falls to the crank Tighten the top adjustment screw
side. clockwise (about 1/4 turn).
If shifting is difficult from the Loosen the top adjustment screw
intermediate chainring to the counterclockwise
largest chainring. (about 1/8 turn).
If shifting is difficult from the Loosen the low adjustment screw
intermediate chainring to the counterclockwise
smallest chainring. (about 1/4 turn).
If the chain does not shift Turn the outer casing adjustment
smoothly from the intermediate barrel about 1/4 of a turn
chainring to the largest chainring counterclockwise.
even though the top adjustment
bolt has been adjusted.
If the chain does not shift Turn the outer casing adjustment
smoothly from the intermediate barrel about 1/4 of a turn
chainring to the smallest clockwise.
chainring even though the low
adjustment bolt has been
adjusted.
If there is interference between Tighten the top adjustment screw
the chain and the front derailleur clockwise (about 1/8 turn).
inner plate at the largest
chainring.
If there is interference between Loosen the top adjustment screw
the chain and the front derailleur counterclockwise
(about 1/8 turn).
outer plate at the largest
chainring.
If the intermediate chainring is Loosen the outer casing
skipped when shifting from the adjustment barrel
largest chainring. counterclockwise (1 or 2 turns).
If there is interference between Tighten the outer casing
the chain and front derailleur adjustment barrel clockwise
inner plate when the rear (1 or 2 turns).
sprocket is shifted to the largest
sprocket when the chainwheel is
at the intermediate chainring
position.
If the chain falls to the bottom Tighten the low adjustment screw
clockwise (about 1/2 turn).
bracket side.
If the lever is stiff when shifting Loosen the top adjustment screw
counterclockwise (about 1/4
from the intermediate chainring
to the largest chainring. turn).
3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan