FD-4403

Technical Service Instructions

SI-5EW0B

FD-4403

Front derailleur

General Safety Information

WARNING

• Obtain and read the service instructions carefully prior to installing the parts. Loose, worn, or damaged parts may cause injury to the rider.

We strongly recommend only using genuine

Shimano replacement parts.

• Be careful not to let the cuffs of your clothes get caught in the chain while riding, otherwise you may fall off the bicycle.

• Read these Technical Service Instructions carefully, and keep them in a safe place for later reference.

Note

• If gear shifting operations cannot be carried out smoothly, clean 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.

Front chainrings

Rear sprockets

• If attaching the FD-4403 (brazed-on type) to a seat tube with a thickness of more than 31.8 mm, the derailleur may come into contact with the seat tube and interfere with normal gear shifting performance.

• For smooth operation, use the specified outer casing and the bottom bracket cable guide.

• Grease the inner cable and the inside of the outer casing before use to ensure that they slide properly.

• 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.

• For the chain, be sure to use only the Shimano narrow type chain. The wide type chain cannot be used.

• 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.

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

Series

Shifting lever

Outer casing

Gears

Front derailleur

Front chainwheel

Bottom bracket

Rear derailleur

Freehub

Cassette sprocket

Chain

Bottom bracket cable guide

TIAGRA

ST-4400 / ST-R600

SL-R440

SP40

27

FD-4403

FC-4404

BB-ES51 / BB-ES30

RD-4400-GS

FH-4400

CS-HG50-9

CN-HG53

SM-SP17

Specifications

Type

Front chainwheel tooth difference

Min. difference between top and intermediate

Front derailleur installation band diameter

Chainstay angle (

C

)

Chain line

Band type / Brazed on type

22 teeth or less

10T

S (28.6mm), M (31.8mm)

63° - 66°

45mm

Chainstay angle

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.

Pro-Set alignment block

Gear teeth should come within this range

Pro-Set gauge

1mm

3mm

The level section of the chain guide outer plate should be directly above and parallel to the largest chainring.

Secure using a 5mm Allen key.

Tightening torque:

5 - 7 N·m

{44 - 60 in. lbs.}

Chainwheel

(largest chainring)

Chain guide t

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 - 0.5mm.

Chain position

Largest sprocket

Smallest chainring

Pro-Set alignment block

Note: There are 2 derailleur positions for the intermediate chainring. When making the cable adjustment, make sure that the derailleur is in the inner side (toward small chainring) of the two positions. Locate the derailleur to this position by shifting from the largest to the intermediate chainring (recommended) or by shifting from the small to the intermediate chainring, then gently press lever (b) until a small click is felt (to position the derailleur to the inner side of the intermediate chainring).

Adjust the cable tension by using the outer adjustment barrel so that the clearance between the chain guide inner plate and the chain is 0 -

0.5 mm.

B

B A

Low adjustment screw

Chain guide inner plate

Chain

A

2. Connection and securing of cable

While pulling the inner cable, tighten the wire fixing bolt with a 5 mm allen key to secure the cable.

Tightening torque:

5 - 7 N·m

{44 - 60 in. lbs.}

Pull

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

3. Top adjustment

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

Chain position

Smallest sprocket

Largest chainring

B

B A

Top adjustment screw

A

Chain guide inner plate

Chain

4. Cable adjustment using the intermediate chainring

When making the cable adjustment, place the chain on the largest sprocket for the rear and the middle chainring for the front.

Chain position

Largest sprocket

Intermediate chainring

B A

Outer casing adjustment bolt

Front shifting (ST-4400)

Chain guide inner plate

B

Chain

A

Lever [

Lever [

Lever [

From large chainring to small chainring

Lever

[

From small chainring to large 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 side

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

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

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

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

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 the chain falls to the bottom bracket side.

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).

Tighten the top adjustment screw clockwise (about 1/8 turn).

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

Loosen the outer casing adjustment barrel counterclockwise (1 or 2 turns).

Tighten the outer casing adjustment barrel clockwise (1 or 2 turns).

Tighten the low adjustment screw clockwise (about 1/2 turn).

Be sure to read these service instructions in conjunction with the service instructions for the ST-4400 / R600, SL-R440 before use.

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, Osaka 590-8577, Japan

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

© Jul. 2004 by Shimano Inc. XBC SZK Printed in Japan.

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