Shimano XT M770 FD User Manual

User Manual: Shimano XT M770 FD User Manual

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SI-6MPFA-003-00

General Safety Information

Specifications
Front Derailleur

WARNING
• Use neutral detergent to clean the chain. Do not use alkali-based or acid based detergent such as rust cleaners as it may result
in damage and/or failure of the chain.
• Use the reinforced connecting pin only for connecting the narrow type of chain.
• There are two different types of reinforced connecting pins available. Be sure to check the table below before selecting which
pin to use.
Reinforced
If connecting pins other than reinforced connecting pins
Chain
Chain tool
connecting pin
are used, or if a reinforced connecting pin or tool which
is not suitable for the type of chain is used, sufficient
9-speed super narrow
Silver
connection force may not be obtained, which could
chain such as
TL-CN32 / TL-CN27
6.5mm
CN-7701 / CN-HG93
cause the chain to break or fall off.
8- / 7- / 6-speed narrow
• If it is necessary to adjust the length of the chain due
Black
chain such as
TL-CN32 / TL-CN27
to a change in the number of sprocket teeth, make the
7.1mm
CN-HG50 / CN-HG40
cut at some other place than the place where the chain
has been joined using a reinforced connecting pin or an end pin. The chain will be damaged if it
Reinforced Connecting Pin
is cut at a place where it has been joined with a reinforced connecting pin or an end pin.
• Be careful not to let the cuffs of your clothes get caught in the chain while riding, otherwise you
may fall off the bicycle.
• Check that the tension of the chain is correct and that the chain is not damaged. If the tension
End Pin
Link Pin
is too weak or the chain is damaged, the chain should be replaced. If this is not done, the chain
may break and cause serious injury.
• Use a front chainwheel which is compatible with 9-speed chains in conjunction with Shimano CN-7701,
CN-HG93 and CN-HG73 chains. If a chainwheel for an 8-speed chain or less is used, front chainwheel gear shifting problems
may occur, or the chain pins might fall out, causing the chain to break.
• The two left crank arm mounting bolts should be tightened alternately in stages rather than each bolt being fully tightened all at
once. Use a torque wrench to check that the final tightening torques are within the range of 12 - 14 N·m.
Furthermore, after riding approximately 100 km (60 miles), use a torque wrench to re-check the tightening torques.
It is also important to periodically check the tightening torques.
If the tightening torques are too weak or if the mounting bolts are not tightened alternately in stages, the left crank arm may
come off and the bicycle may fall over, and serious injury may occur as a result.
• Check that there are no cracks in the crank arms before riding the bicycle. If there are any cracks, the crank arm may break and
you may fall off the bicycle.
• If the inner cover is not installed correctly, the axle may rust and become damaged, and the bicycle may fall over and serious
injury may occur as a result.
• 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

• In addition, if pedaling performance does not feel normal, check this once more.
• Before riding the bicycle, check that there is no play or looseness in the connection. Also, be sure to retighten the crank arms
and pedals at periodic intervals.
• If a squeaking noise is heard coming from the bottom bracket axle and the left crank arm connector, apply grease to the connector and
then tighten it to the specified torque.
• Do not wash the bottom bracket with high-pressure jets of water.
• If you feel any looseness in the bearings, the bottom bracket should be replaced.
• 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.
• You should periodically wash the chainrings in a neutral detergent and then lubricate them again. In addition, cleaning the chain
with neutral detergent and lubricating it can be an effective way of extending the useful life of the chainrings and the chain.
• If the chain keeps coming off the chainrings during use, replace the chainrings and the
chain.
Front
• When the chain is in the position shown in the illustration, the chain may contact the front
chainrings
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.
• Apply grease to the left and right adapters before installing them.
Rear
• For smooth operation, use the specified outer casing and the bottom bracket cable guide.
sprockets
• 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.
• When installing the top route type, choose a frame that has three outer casing holders as shown in the
Outer casing holders
illustration at right.
• Use an outer casing which still has some length to spare even when the handlebars are turned all the way
to both sides. Furthermore, check that the shifting lever does not touch the bicycle frame when the
handlebars are turned all the way.
• A special grease is used for the gear shifting cable (SIS-SP41). Do not use DURA-ACE grease or other
types of grease, otherwise they may cause deterioration in gear shifting performance.
• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.
• Operation of the levers related to gear shifting should be made only when the front chainwheel is turning.
• If the brake fluid used in the oil disc brakes is of a type which tends to adhere to the plastic parts of the shifting lever, this may
cause the plastic parts to crack or become discolored. Therefore, you should make sure that the brake fluid does not adhere to
these plastic parts.
The mineral oil which is used in SHIMANO disc brakes does not cause cracking or discoloration if it adheres to plastic parts, but
such parts should be cleaned with alcohol beforehand to prevent foreign particles from adhering.
• Do not disassemble the indicator and shifting lever unit, as this may damage them or cause mis-operation.
• 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.

X = Available

Model number

FD-M770-E FD-M770

Normal type

Top route type

SI-6MPFA-003

Front Drive System

FD-M772 / M772A
FD-M773

Front chainwheel tooth difference

22T

Min. difference between top and intermediate

12T

–

S, M, L

Chainstay angle (a)

66° - 69°

63° - 66°

Applicable chain line

50 mm

44T

44T / 48T

44T

44T / 48T

Front derailleur installation band diameter

Applicable front chainwheel

Installation band diameters:
S (28.6 mm), M (31.8 mm), L (34.9 mm)
When using the S, M size, use an
installation band with a diameter of
28.6 mm, 31.8mm and install it to a
L size adapter.

• FD-M770/ FD-M772/ FD-M772A

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.

< Normal type >

The level section of the chain guide
outer plate should be directly above
and parallel to the largest chainring.
Secure using a 5 mm Allen key.

FC-M770

FC-M771-K

Chainwheel tooth combination

44-32-22T

48-36-26T

Note:
Pass the cable through as shown
in the illustration.

Bolt circle diameter
Crank arm length

Chain length

104 mm / 64 mm

165 mm, 170 mm, 175 mm, 180 mm

Chain line

50 mm

68, 73 mm

BC1.37 (68, 73mm)

Bottom bracket shell width
Thread dimensions
Applicable bottom bracket

FD-M771
Largest sprocket

Wire fixing bolt

Tightening torque :
6 - 7 N·m {52 - 60 in. lbs.}

SM-BB70

Installation of the lever

After taking up the initial slack in the cable, re-secure to the front
derailleur as shown in the illustration.

Use a handlebar grip with a
maximum outer diameter of 36 mm.

Gear shifting operation
This release lever is equipped with a 2-way release mechanism which allows release operations to be carried out by either pushing or pulling
the lever.
Both lever (A) and lever (B) always return to the initial position when they are released after shifting.
When operating one of the levers, always be sure to turn the crank arm at the same time.

To shift from a small chainring to a larger chainring

To shift from a large chainring to a smaller chainring

When lever (A) is pressed once, there is
a shift of one step from a small chainring
to a larger chainring.

When lever (B) is pressed once, there is
a shift of one step from a large
chainring to a smaller chainring.

from intermediate chainring
to largest chainring.

Tightening torque :
2.5 N·m {22 in. lbs.}
Outboard

Lever (A) initial position

Inboard

2-way release

Installation of the Front Chainwheel and Front Derailleur
1, 2 Use the special tool TL-FC32/36 to install the right adapter

3
4

Insert the right crank unit.

Wide groove
area

Set section A of the left crank into the axle of the right crank unit
where the groove is wide.

Use the TL-FC16/18 to tighten the cap.
Tightening torque: 0.7 - 1.5 N·m {6 - 13 in. lbs.}

Push in the stopper plate and check that the plate pin is securely
in place, and then tighten the bolt of the left crank arm. (5 mm
Allen key)
Note : Each of the bolts should be evenly and equally tightened
to 12 - 14 N·m {106 - 122 in. lbs.}.

SIS Adjustment

TL-FC16

Pro-Set alignment
block

Plate pin

Bracket Type

F
A

Band Type

BB mounttype bracket

F
A

68 mm
*1

F
A

73 mm

F
B

F
C

F
A

73 mm

F
A

F
B

F
C

2.5 mm

1.8 mm

0.7 mm

Chaincase Stay Type
68 mm

F
A

Bracket Type

Chaincase stay 68 mm

F
C F
A

73 mm

F
A

BB mounttype bracket

F
A

SIS-SP41

Front derailleur
Front chainwheel
Chain
Bottom bracket cable guide

F
A

FD-M770 / FD-M771 / FD-M772 / FD-M773 / FD-M770-E / FD-M772A
FC-M770 / FC-M771-K
CN-HG93
SM-SP17 / SM-BT17

For bracket type
Install as shown in the
illustration.

Front Derailleur

Largest
sprocket

FD-M770/
M772/M772A

Smallest
chainring

Chain guide
inner plate
Chain

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.

Lever (B)

Inner cable

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.

3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan

* Service Instructions in further languages are available at :
http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English)
© Apr. 2009 by Shimano Inc. XBC SZK Printed in Japan.

Adapter

Adapter
Outer end cap

Tightening torque :
35 - 50 N·m {305 - 435 in. lbs.}

Intermediate
chainring

B
Chain guide
inner plate
Chain

B
A
Outer casing adjustment barrel

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.)
If the chain falls to the crank
side.

Tighten the top adjustment screw
clockwise (about 1/4 turn).

If shifting is difficult from the
intermediate chainring to the
largest chainring.

Loosen the top adjustment screw
counterclockwise
(about 1/8 turn).

If shifting is difficult from the
intermediate chainring to the
smallest chainring.

Loosen the low adjustment screw
counterclockwise
(about 1/4 turn).

Tighten the top adjustment screw
If there is interference between
the chain and the front derailleur clockwise (about 1/8 turn).
inner plate at the largest
chainring.

If the intermediate chainring is
skipped when shifting from the
largest chainring.

Pro-Set gauge

One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222

Pro-Set alignment block

Gear teeth
should come
within this range

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.

Loosen the top adjustment screw
If there is interference between
the chain and the front derailleur counterclockwise
(about 1/8 turn).
outer plate at the largest
chainring.

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.

Adjust and then install the front derailleur as shown in the
illustration. Do not remove the Pro-Set alignment block at this time.

Front Chainwheel
Bolt

This service instruction explains how to use
and maintain the Shimano bicycle parts
which have been used on your new bicycle.
For any questions regarding your bicycle or
other matters which are not related to
Shimano parts, please contact the place of
purchase or the bicycle manufacturer.

F
C

If using three 2.5 mm spacers with a band type and a bottom bracket shell having a width of 68 mm, install the three spacers so that there are two on the right and one on the
left.
*2 1.8 mm corresponds to the thickness of the chain case.

4. Adjustment of the intermediate
chainring

Low adjustment
screw

Chain position

73 mm

Chain

B A

Spacer

< FC-M771-K >
68 mm

F
A

Push up

Stopper plate

Top adjustment
screw

FD-M771/M773

Chain guide
outer plate

Largest
sprocket

Note :
Set the stopper plate in
the right direction as
shown in illustration.

Largest
chainring

Chain position

FD-M771/M773
Inner cover

(1) Check whether the width of the bottom bracket
shell is 68 mm or 73 mm.
(2) Next, install the adapter while referring to the
illustrations below.

68 mm

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.

■ Spacer installation method

< FC-M770 >

Be sure to follow the sequence described below.

FD-M770/M772/M772A

Set so that the clearance
between the chain guide outer
plate and the chain is
0 - 0.5 mm.

3 mm Allen key

• Install the shifting lever in a position where it will not obstruct brake
operation and gear shifting operation.
• Do not use in a combination which causes brake operation to be
obstructed.

(counterclockwise thread) and the left adapter (clockwise
thread).
Tightening torque: 35 - 50 N·m {305 - 435 in. lbs.}

3. Top adjustment

Smallest
sprocket
3 mm Allen key

TL-FC32

Pull

Chain position

Lever (B)

Follow the procedure in the figure.

Top route type

Pull

If not using the indicator, this shifting lever can be installed either
on the inside or the outside of the brake lever.
If adjusting the position, remove the indicator, and then be sure
to secure it in the new position with the two fixing bolts.

from largest chainring
to intermediate chainring.

Normal type

Tightening torque :
5 N·m {44 in. lbs.}

4 mm Allen key

Example:

FD-M773

Largest chainring

Chain

Outer casing

5 mm Allen key

• FD-M771/FD-M773

Add 2 links (with the chain on both
the largest sprocket and the largest
chainring)

In order to realize the best performance, we recommend that the following combination be used.
SL-M770

Wire
fixing bolt

Chain guide

Tightening torque :
5 - 7 N·m {44 - 60 in. lbs.}

Inner hole cover

Rapidfire (Shifting lever)

Note:
Pass the cable
through as shown
in the illustration.

Chainwheel
(largest chainring)

Chainstay angle

Model number

73 mm

Series

< Top route type >

Chainwheel

Band Type

Technical Service Instructions

FD-M771

■ Note

Loosen the outer casing
adjustment barrel
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
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).

■ Refer to the Service Instructions for the Rear Drive
System for details on replacing and installing the
indicator unit.

SI-6MSFA-002-00

General Safety Information

Specifications
Front Derailleur

WARNING
“Maintenance interval depends on the usage and riding circumstances. Clean regularly the chain
with an appropriate chaincleaner. Never use alkali based or acid based solvents such as rust
cleaners. If those solvent be used chain might break and cause serious injury.”

FD-M770-E FD-M770

Normal type

Top route type

Note

Adjusting the grip width

• In addition, if pedaling performance does not feel normal, check this once more.
• Before riding the bicycle, check that there is no play or looseness in the connection. Also, be sure to retighten the crank arms
and pedals at periodic intervals.
• Do not wash the bottom bracket with high-pressure jets of water.
• If you feel any looseness in the bearings, the bottom bracket should be replaced.
• 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.
• You should periodically wash the chainrings in a neutral detergent and then lubricate them again. In addition, cleaning the chain
with neutral detergent and lubricating it can be an effective way of extending the useful life of the chainrings and the chain.
• If the chain keeps coming off the chainrings during use, replace the chainrings and the chain.
• 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
Front
onto the next-larger rear sprocket or the one after.
chainrings
• Apply grease to the left and right adapters before installing them.
• For smooth operation, use the specified outer casing and the bottom bracket cable guide.
• This front derailleur is for triple front chainwheel use only. It cannot be used with the
Rear
double front chainwheel, as the shifting points do not match.
sprockets
• When installing the top route type, choose a frame that has three outer casing holders as
shown in the illustration at right.
• Use an outer casing which still has some length to spare even when the handlebars are turned all the way Outer casing holders
to both sides. Furthermore, check that the shifting lever does not touch the bicycle frame when the
handlebars are turned all the way.
• Make sure that the gear shifting cable and the brake cable do not obstruct each other during braking
operations. If they do obstruct, it may interfere with braking.
Install the cables so that they still have some slack in them even when the handlebars are turned fully in
either direction.
• A special grease is used for the gear shifting cable (SIS-SP41). Do not use DURA-ACE grease or other
types of grease, otherwise they may cause deterioration in gear shifting performance.
• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.
• Operation of the levers related to gear shifting should be made only when the front chainwheel is turning.
• If the brake fluid used in the oil disc brakes is of a type which tends to adhere to the plastic parts of the shifting lever, this may
cause the plastic parts to crack or become discolored. Therefore, you should make sure that the brake fluid does not adhere to
these plastic parts.
The mineral oil which is used in SHIMANO disc brakes does not cause cracking or discoloration if it adheres to plastic parts, but
such parts should be cleaned with alcohol beforehand to prevent foreign particles from adhering.
• Do not use the fixing bolt (made from aluminum) for the auxiliary release lever cap to secure the auxiliary release lever.
• 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.

SI-6MSFA-002

Front Drive System
In order to realize the best performance, we recommend that the following combination be used.
Series
DUAL CONTROL lever
Outer casing
Front derailleur
Front chainwheel
Chain
Bottom bracket cable guide

XT
ST-M770 / ST-M775

FD-M772 / M772A
FD-M773

Front chainwheel tooth difference

22T

Min. difference between top and intermediate

12T

–

S, M, L

Chainstay angle (a)

66° - 69°

63° - 66°

Applicable chain line

50 mm

44T

44T / 48T

44T

44T / 48T

Front derailleur installation band diameter

Applicable front chainwheel

Installation band diameters:
S (28.6 mm), M (31.8 mm), L (34.9 mm)
When using the S, M size, use an
installation band with a diameter of
28.6 mm, 31.8mm and install it to a
L size adapter.

Model number

Crank arm length

165 mm, 170 mm, 175 mm, 180 mm

50 mm

68, 73 mm

BC1.37 (68, 73mm)

Bottom bracket shell width
Thread dimensions

Set so that the clearance
between the chain guide outer
plate and the chain is 0 - 0.5
mm.

1. Low adjustment

48-36-26T
104 mm / 64 mm

Chain line

3. Top adjustment

FC-M771-K

44-32-22T

Bolt circle diameter

Pull

Be sure to follow the sequence described below.

104 mm / 64 mm

Chainwheel tooth combination

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 position
Smallest
sprocket

Largest
chainring

Top adjustment
screw
Chain guide
outer plate

FD-M770/M772/M772A
FD-M770/M772/M772A

Chain

4. Adjustment of the intermediate chainring
Low adjustment
screw

Operating the levers
■ Operating the brake
lever

Chain position

■ Gear shifting operation
The INSTANT RELEASE
mechanism makes fast gear
shifting possible because cable
tension is released immediately
when either the main lever or
the secondary release lever is
depressed.

Largest
sprocket

Smallest
chainring

The lever always returns to the initial position when it is released
after shifting. When operating the lever, always be sure to turn the
crank arm at the same time.

Chain guide
inner plate

When lever is pressed once, there is a shift of one step from a
small chainring to a larger chainring.
Example: from intermediate chainring to largest chainring.

Chain
Chain guide
inner plate

2. Connecting and securing the inner cable
Operate the lever 2 or more times to set the lever to the lowest
position. After removing the inner hole cover and opening the
cover, pass the cable through the outer casing adjustment bolt.
Pull the inner cable all the way through so that the end of the
inner cable is set onto the hook, and then close the cover.

Lever initial position

1st joint

Cover

When lever is pressed once, there is a shift of one step from a
large chainring to a smaller chainring.

Approx.
2 mm

Inner hole cover

Example: from largest chainring to intermediate chainring.

Lever end

Inner hole cover

Becomes
wider

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.

Lever initial position

Auxiliary release lever

Becomes
narrower
Becomes wider
2 mm Allen key

Cutting the outer casing

ST-M775

■ 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.
Install as shown in the
illustration.

Intermediate
chainring

Front Derailleur
Front Chainwheel

The level 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)

Outer end cap

Attach the same outer
end cap to the cut end of
the outer casing.

If the chain falls to the crank
side.

Tighten the top adjustment screw
clockwise (about 1/4 turn).

If shifting is difficult from the
intermediate chainring to the
largest chainring.

Loosen the top adjustment screw
counterclockwise
(about 1/8 turn).

If shifting is difficult from the
intermediate chainring to the
smallest chainring.

Loosen the low adjustment screw
counterclockwise
(about 1/4 turn).

Tighten the top adjustment screw
If there is interference between
the chain and the front derailleur clockwise (about 1/8 turn).
inner plate at the largest
chainring.
Loosen the top adjustment screw
If there is interference between
the chain and the front derailleur counterclockwise
(about 1/8 turn).
outer plate at the largest
chainring.
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 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).

• FD-M770/M772/M772A
< Normal type >

Bolt

After completion of steps 1 - 4, move the shifting lever to check the
shifting. (This also applies if shifting becomes difficult during use.)

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.

Installation of the Front Derailleur

For bracket type

Largest
sprocket

Outer casing adjustment
barrel

5. Troubleshooting chart

To shift from a large chainring to a smaller chainring

ST-M770

Chain

Chain position

Hook

It is recommended that you adjust the grip widths of the levers to
the most comfortable widths for gear shifting and braking.

Becomes
narrower

To shift from a small chainring to a larger chainring

< Top route type >

Chain guide

Note:
Pass the cable
through as shown
in the illustration.

Adapter

Tightening torque :
35 - 50 N·m {305 - 435 in. lbs.}

Wire
fixing bolt

Adjust and then install the front derailleur as shown in the
illustration. Do not remove the Pro-Set alignment block at this time.
Pro-Set alignment block

Gear teeth
should come
within this range

5 mm Allen key

Chain length
Add 2 links (with the chain on both
the largest sprocket and the largest
chainring)

Largest sprocket

Largest chainring

• FD-M771/FD-M773

This service instruction explains how to use and maintain the
Shimano bicycle parts which have been used on your new bicycle.
For any questions regarding your bicycle or other matters which
are not related to Shimano parts, please contact the place of
purchase or the bicycle manufacturer.

Note:
Pass the cable through as shown
in the illustration.

Pro-Set gauge

FD-M771

FD-M773
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003

Chain

SIS-SP41

Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222

Wire fixing bolt

FC-M770 / FC-M771-K
CN-HG93

FD-M771/M773

Pro-Set alignment
block

FD-M770 / FD-M771 / FD-M772 / FD-M773 / FD-M770-E / FD-M772A

SM-SP17 / SM-BT17

Top route type

Pull

SIS Adjustment

FC-M770

Normal type

Tightening torque :
6 - 8 N·m {53 - 69 in. lbs.}

Chainstay angle

Chainwheel

Adapter

Technical Service Instructions

FD-M771

4 mm Allen key

Use a handlebar grip with a maximum
outer diameter of 32 mm.

X = Available

Model number

• The ST-M770/ST-M775 DUAL CONTROL lever is used for both gear shifting and braking operations.
Make sure that you fully understand and are accustomed to the gear shifting and braking operations for your bicycle. Refer to
the illustration for the method of operation.
• Braking can only be performed with the DUAL CONTROL lever. If you use the gear shifting release lever (Auxiliary release
lever) for braking, the release lever may become damaged and you may lose control of the bicycle, which could result in an
accident.
• If the internal unit of the DUAL CONTROL lever becomes damaged, the lever will move down from the normal lever position,
and it may move to a position where braking is difficult to carry out. If this happens, you should stop riding the bicycle
immediately.
• Use the reinforced connecting pin only for connecting the narrow type of chain.
• There are two different types of reinforced connecting
Reinforced
pins available. Be sure to check the table before
Chain
Chain tool
connecting pin
selecting which pin to use. If connecting pins other than
reinforced connecting pins are used, or if a reinforced
9-speed super narrow
Silver
chain such as
TL-CN32 / TL-CN27
connecting pin or tool which is not suitable for the type
6.5mm
CN-7701 / CN-HG93
of chain is used, sufficient connection force may not be
8/
7/
6-speed
narrow
obtained, which could cause the chain to break or fall
Black
chain such as
TL-CN32 / TL-CN27
off.
7.1mm
CN-HG50 / CN-HG40
• If it is necessary to adjust the length of the chain due
to a change in the number of sprocket teeth, make the cut at some other place than the place
Reinforced Connecting Pin
where the chain has been joined using a reinforced connecting pin or an end pin. The chain will
be damaged if it is cut at a place where it has been joined with a reinforced connecting pin or an
end pin.
• Be careful not to let the cuffs of your clothes get caught in the chain while riding, otherwise you
End Pin
Link Pin
may fall off the bicycle.
• Check that the tension of the chain is correct and that the chain is not damaged. If the tension is too weak or the chain is
damaged, the chain should be replaced. If this is not done, the chain may break and cause serious injury.
• Use a front chainwheel which is compatible with 9-speed chains in conjunction with Shimano CN-7701, CN-HG93 and CNHG73 chains. If a chainwheel for an 8-speed chain or less is used, front chainwheel gear shifting problems may occur, or the
chain pins might fall out, causing the chain to break.
• The two left crank arm mounting bolts should be tightened alternately in stages rather than each bolt being fully tightened all at
once. Use a torque wrench to check that the final tightening torques are within the range of 12 - 14 N·m.
Furthermore, after riding approximately 100 km (60 miles), use a torque wrench to re-check the tightening torques.
It is also important to periodically check the tightening torques. If the tightening torques are too weak or if the mounting bolts are
not tightened alternately in stages, the left crank arm may come off and the bicycle may fall over.
• Check that there are no cracks in the crank arms before riding the bicycle. If there are any cracks, the crank arm may break and
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.

After taking up the initial slack in the cable, re-secure to the front
derailleur as shown in the illustration.

Installation of the lever

■ Be sure to read the service instructions for the FC-M770/M771-K Front Chainwheel in conjunction with these service
instructions.

Tightening torque :
6 - 7 N·m {53 - 60 in. lbs.}

3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan

* Service Instructions in further languages are available at :
http://techdocs.shimano.com
Please note: specifications are subject to change for improvement without notice. (English)
© Oct. 2009 by Shimano Inc. XBC SZK Printed in Japan.

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