* Service Instructions in further languages are available at : http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English) ©Nov. 2009 by Shimano Inc. XBC SZK Printed in Japan.
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
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
• 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.
• 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.
Front
chainrings
Rear
sprockets
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
2. Connecting and securing the inner cable
Operate lever (B) two times or
more, and check on the indicator
that the lever is at the lowest
position. Then remove the inner
hole cover and
connect the inner cable.
Inner hole cover
Lever (B)
Inner cable
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 screw
thread.
Inner hole cover
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
Adjust the height while the level section of the chain guide outer
plate is directly above the largest chainring. Secure using a 5 mm
allen key.
Installation of the front derailleur
Adjust and then install the front derailleur as shown in the
illustration. Do not remove the Pro-Set alignment block at this time.
Gear teeth should come
within this range
Pro-Set gauge
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Chain guide
Chainwheel (largest chainring)
Pro-Set alignment block
SIS Adjustment
Be sure to follow the sequence described below.
1. Low adjustment
First remove the Pro-Set alignment block (FD-M771-10D/
FD-M661-10D).
Next, set so that the clearance between the chain guide inner
plate and the chain is 0 - 0.5 mm.
Low adjustment
screw
Chain
Chain guide
inner plate
Pro-Set alignment
block
Chain position
Largest
sprocket
Smallest
chainring
If the chain falls to the crank
side.
If shifting is difficult from the
intermediate chainring to the
smallest chainring.
Tighten the top adjustment screw
clockwise (about 1/4 turn).
Loosen the top adjustment screw
counterclockwise
(about 1/8 turn).
Loosen the low adjustment screw
counterclockwise
(about 1/4 turn).
If there is interference between
the chain and the front derailleur
inner plate at the largest
chainring.
If there is interference between
the chain and the front derailleur
outer plate at the largest
chainring.
Tighten the top adjustment screw
clockwise (about 1/8 turn).
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 the chain falls to the bottom
bracket side.
Tighten the outer casing
adjustment barrel clockwise
(1 or 2 turns).
Tighten the low adjustment screw
clockwise (about 1/2 turn).
5. Troubleshooting chart
After completion of steps 1 - 4, move the shifting lever to check
the shifting. (This also applies if shifting becomes difficult during
use.)
Chain
Chain guide
outer plate
Top adjustment
screw
Chain
Chain guide
inner plate
Outer casing adjustment barrel
3. Top adjustment
Set so that the clearance between the
chain guide outer plate and the chain is
0 - 0.5 mm.
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.
If shifting is difficult from the
intermediate chainring to the
largest chainring.
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 position
Smallest
sprocket
Largest
chainring
Chain position
Largest
sprocket
Intermediate
chainring
SI-5MK0A-001-00
Model number
Normal type
Top route type
Front chainwheel tooth difference
Min. difference between top and intermediate
Front derailleur installation band diameter
Chainstay angle (a)
Applicable chain line
Applicable front chainwheel
FD-M661-10DFD-M771-10D
FD-M660-10EFD-M770-10E
Models without BB plate
50 mm
For triple chainwheel only
(42-32-24T)
X
X
18T
10T
–
66° - 69°
50 mm
For triple chainwheel only
(42-32-24T)
X
X
18T
10T
–
66° - 69°
Specifications
X = Available
Technical Service Instructions SI-5KM0A-001
FD-M771-10D / FD-M661-10D
FD-M770-10E / FD-M660-10E Front derailleur
• FD-M771-10D / FD-M661-10D
• FD-M770-10E / FD-M660-10E
Models without BB plate
Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}
Bottom bracket
mount
Bracket
Example: When using an Allen key
Bottom bracket mount fixing bolt
Note: Shimano does not provide
the bottom bracket mount
fixing bolts.
< Normal type >
• FD-M771-10D
< Top route type >
5 mm Allen key
Tightening torque :
6 - 7 N·m {52 - 60 in. lbs.}
< Normal type >
• FD-M661-10D
• FD-M770-10E / FD-M660-10E
< Top route type >
Note:
Pass the cable through as
shown in the illustration.
Wire fixing bolt
Note:
Pass the cable through as
shown in the illustration.
Wire fixing bolt
Use an 8 mm spanner to tighten the wire fixing bolt.
< Normal type > < Top route type >
8 mm spanner
Note:
Pass the cable through as
shown in the illustration.
Wire fixing bolt
FD-M770-10E
FD-M660-10E
FD-M771-10D
FD-M661-10D
FD-M771-10D
FD-M661-10D
FD-M770-10E
FD-M660-10E
