FD-4403

FD-4403
Technical Service Instructions
FD-4403
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SI-5EW0B
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
In order to realize the best performance, we
recommend that the following combination be used.
Series
TIAGRA
Shifting lever
ST-4400 / ST-R600
SL-R440
Outer casing
SP40
Gears
27
Front derailleur
FD-4403
Front chainwheel
FC-4404
Bottom bracket
BB-ES51 / BB-ES30
Rear derailleur
RD-4400-GS
Freehub
FH-4400
Cassette sprocket
CS-HG50-9
Chain
CN-HG53
Bottom bracket cable guide
SM-SP17
Specifications
Type
Band type / Brazed on type
Front chainwheel tooth
difference
22 teeth or less
Min. difference between top
and intermediate
10T
Front derailleur
installation band diameter
Rear
sprockets
S (28.6mm), M (31.8mm)
Chainstay angle (C)
63° - 66°
Chain line
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
A-52
Pro-Set gauge
SG
• 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.
45mm
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
Chainstay
angle
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
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.
Pro-Set alignment block
Chain position
B A
Largest
sprocket
Low adjustment
screw
A
B
B
Intermediate
chainring
B
A
Chain guide
inner plate
A
Chain
Outer casing adjustment bolt
Chain guide inner plate
Front shifting (ST-4400)
Chain
2. Connection and securing of cable
Lever [
b
While pulling the inner cable, tighten the wire fixing
bolt with a 5 mm allen key to secure the cable.
Lever [
b
Tightening torque:
5 - 7 N·m
{44 - 60 in. lbs.}
From large chainring
to small chainring
Lever [
a
Lever [
a
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.)
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.
B A
Top adjustment
screw
B
Chain position
Smallest
sprocket
Largest
chainring
A
Chain guide inner
plate
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).
If there is interference between the chain
and the front derailleur inner plate at the
largest chainring
Tighten the top adjustment screw
clockwise (about 1/8 turn).
If there is interference between the chain
and the front derailleur outer plate at the
largest chainring
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 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.
Tighten the outer casing adjustment
barrel clockwise (1 or 2 turns).
If the chain falls to the bottom bracket
side.
Tighten the low adjustment screw
clockwise (about 1/2 turn).
Chain
4. Cable adjustment using the intermediate
chainring
Be sure to read these service instructions in conjunction with the service
instructions for the ST-4400 / R600, SL-R440 before use.
When making the cable adjustment, place the chain
on the largest sprocket for the rear and the middle
chainring for the front.
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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