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SI-6MSFA-002-00

General Safety Information

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."

• 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

pins available. Be sure to check the table before

Chain

selecting which pin to use. If connecting pins other than

reinforced connecting pins are used, or if a reinforced

9-speed super narrow

connecting pin or tool which is not suitable for the type

chain such as

of chain is used, sufficient connection force may not be

CN-7701 / CN-HG93

8- / 7- / 6-speed narrow

obtained, which could cause the chain to break or fall

chain such as

off.

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

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

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 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.

• 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.

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.

• 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

onto the next-larger rear sprocket or the one after.

• 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

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 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.

• 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.

Technical Service Instructions

Front Drive System

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

Series

DUAL CONTROL lever

ST-M770 / ST-M775

Outer casing

Front derailleur

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

Front chainwheel

FC-M770 / FC-M771-K

Chain

Bottom bracket cable guide

SM-SP17 / SM-BT17

Specifications

Front Derailleur

Model number

Normal type

Top route type

Front chainwheel tooth difference

Min. difference between top and intermediate

Front derailleur installation band diameter

Chainstay angle (

)

Applicable chain line

Applicable front chainwheel

Chainwheel

Reinforced

Chain tool

connecting pin

Model number

Chainwheel tooth combination

Silver

TL-CN32 / TL-CN27

Bolt circle diameter

6.5mm

Crank arm length

Black

TL-CN32 / TL-CN27

Chain line

7.1mm

Bottom bracket shell width

Reinforced Connecting Pin

Thread dimensions

End Pin

Link Pin

Operating the levers

I Operating the brake

lever

Adjusting the grip width

It is recommended that you adjust the grip widths of the levers to

the most comfortable widths for gear shifting and braking.

1st joint

Approx.

2 mm

Lever end

Front

chainrings

Becomes

wider

Rear

sprockets

Outer casing holders

Becomes

narrower

2 mm Allen key

ST-M770

Installation of the Front Derailleur

I 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.

For bracket type

Install as shown in the

illustration.

Adapter

Tightening torque :

SI-6MSFA-002

35 - 50 N·m {305 - 435 in. lbs.}

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

SIS-SP41

CN-HG93

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

instructions.

X = Available

FD-M772 / M772A

FD-M770-E

FD-M770

FD-M771

FD-M773

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

22T

28.6 mm, 31.8mm and install it to a

L size adapter.

12T

–

S, M, L

66° - 69°

63° - 66°

Chainstay angle

50 mm

44T

44T / 48T

44T

44T / 48T

FC-M770

FC-M771-K

44-32-22T

48-36-26T

104 mm / 64 mm

165 mm, 170 mm, 175 mm, 180 mm

50 mm

68, 73 mm

BC1.37 (68, 73mm)

I Gear shifting operation

The INSTANT RELEASE

The lever always returns to the initial position when it is released

mechanism makes fast gear

after shifting. When operating the lever, always be sure to turn the

shifting possible because cable

crank arm at the same time.

tension is released immediately

To shift from a small chainring to a larger chainring

when either the main lever or

When lever is pressed once, there is a shift of one step from a

the secondary release lever is

small chainring to a larger chainring.

depressed.

Example: from intermediate chainring to largest chainring.

To shift from a large chainring to a smaller chainring

When lever is pressed once, there is a shift of one step from a

large chainring to a smaller chainring.

Example: from largest chainring to intermediate chainring.

Auxiliary release lever

Becomes

narrower

Becomes wider

ST-M775

The level section of the chain guide

Front Derailleur

outer plate should be directly above

and parallel to the largest chainring.

Front Chainwheel

Secure using a 5 mm Allen key.

Bolt

Adapter

Chain length

Pro-Set alignment block

Add 2 links (with the chain on both

Largest sprocket

the largest sprocket and the largest

chainring)

Chain

Installation of the lever

4 mm Allen key

Use a handlebar grip with a maximum

outer diameter of 32 mm.

Tightening torque :

6 - 8 N·m {53 - 69 in. lbs.}

SIS Adjustment

Be sure to follow the sequence described below.

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.

FD-M771/M773

Pro-Set alignment

FD-M770/M772/M772A

block

Low adjustment

screw

Chain position

Largest

Smallest

sprocket

chainring

Chain guide

inner plate

Chain

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

Hook

Cover

Inner hole cover

Install the inner hole cover by turning it

Lever initial position

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.

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.

Chainwheel

(largest chainring)

• FD-M770/M772/M772A

< Normal type >

< Top route type >

Chain guide

Note:

Pass the cable

through as shown

in the illustration.

Wire

fixing bolt

5 mm Allen key

• FD-M771/FD-M773

Largest chainring

Note:

Pass the cable through as shown

in the illustration.

FD-M771

FD-M773

Wire fixing bolt

Tightening torque :

6 - 7 N·m {53 - 60 in. lbs.}

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

3. Top adjustment

Set so that the clearance

between the chain guide outer

plate and the chain is 0 - 0.5

mm.

FD-M771/M773

Chain position

Smallest

Largest

sprocket

chainring

Top adjustment

screw

Chain guide

outer plate

FD-M770/M772/M772A

Chain

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

inner plate

Chain

Chain position

Outer casing adjustment

barrel

Largest

Intermediate

sprocket

chainring

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

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 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

outer plate at the largest

(about 1/8 turn).

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).

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.

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://techdocs.shimano.com

Please note: specifications are subject to change for improvement without notice. (English)