FD-6600

FD-6600
Technical Service Instructions
FD-6600
SI-5JD0A
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,
Front
the chain may contact the front chainrings or front derailleur
and generate noise. If the noise is a problem, shift the chain chainrings
onto the next-larger rear sprocket or the one after.
• For smooth operation, use the specified outer casing and
Rear
the bottom bracket cable guide.
sprockets
• Grease the inner cable and the inside of the outer casing
before use to ensure that they slide properly.
• 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
ULTEGRA
Shifting lever
ST-6600
Outer casing
SP41
Gears
Front derailleur
20
FD-6600
Front chainwheel
FC-6600
Rear derailleur
RD-6600
Freehub
FH-6600
Cassette sprocket
CS-6600
Chain
CN-6600
Bottom bracket cable guide
SM-SP17
Specifications
Type
Front derailleur installation band diameter
Front chainwheel tooth difference
Band type / Brazed on type
S (28.6mm), M (31.8mm), L (34.9mm)
15 teeth or less
Chainstay angle (C)
61° - 66°
Chain line
43.5mm
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Installation of the front derailleur
1. Adjust so that the clearance between the chain guide outer
plate and the large gear is 1 - 3 mm before installing.
Clearance: 1 - 3 mm
Chain guide outer plate
2. The level section of the chain guide outer plate should be
directly above and parallel to the largest chainring.
Chainwheel
(largest chainring)
3. Secure using a 5mm Allen key.
Chain guide
Tightening torque:
5 - 7 N·m
{44 - 60 in. lbs.}
SIS adjustment
1. Low adjustment
Set so that the clearance between the chain guide inner
plate and the chain is 0 - 0.5 mm.
Largest
sprocket
Low adjustment
screw
Inner ring
Chain guide
inner plate
Chain
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.}
After taking up the initial slack in the cable,
re-secure to the front derailleur as shown in
the illustration.
Pull
3. Top adjustment
Set so that the clearance between the chain guide outer
plate and the chain is 0 - 0.5 mm.
Smallest
sprocket
Outer ring
Top adjustment
screw
Chain guide
outer plate
Chain
4. Adjustment of the cable tension
(1) Set the chain to the largest rear
sprocket, and shift the front to
top gear.
Largest
sprocket
Front shifting
Outer ring
Lever [
b
Lever [
b
From large chainring
to small chainring
Lever [
a
Lever [
a
(2) Perform the trimming.
(ST-6600)
From small chainring
to large chainring
■ Trimming (noise-prevention mechanism)
b .
Gently press the lever [
(A “click” sound will be heard.)
While turning the crank arm, gently operate lever (b) and check that the front derailleur
moves slightly toward the small chainring. If the front derailleur moves by a large
amount and the chain is set onto the small chainring at this time, loosen the top
adjustment bolt by 1/8th of a turn. Then, after returning the chain to its original position,
adjust and check the trimming mechanism.
Clearance:
0 - 0.5mm
(3) After trimming, adjust the clearance
(by using the cable-adjustment bolt)
of the chain and chain guide to the
minimum (0 - 0.5 mm).
Largest
sprocket
Outer ring
B
A
Outer casing adjustment bolt
Chain guide
inner plate
Chain
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 small chainring to the
large chainring
Loosen the top adjustment screw
counterclockwise (about 1/8 turn).
If shifting is difficult from the large chainring to the
small chainring
Loosen the low adjustment screw
counterclockwise (about 1/8 turn).
If the chain falls to the bottom bracket side.
Tighten the low adjustment screw clockwise
(about 1/2 turn).
If the gear shifting to the small chainring is stiff and
difficult to carry out after trimming.
Turn the outer casing adjustment bolt
clockwise (1/8 of a turn at a time) until
shifting to the small chainring becomes
smooth. Be careful not to turn the outer
casing adjustment bolt too far at this time,
otherwise shifting to the large chainring will
become more difficult.
Be sure to read these service instructions in conjunction with the service instructions for the
ST-6600 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)
© May. 2004 by Shimano Inc. XBC SZK Printed in Japan.
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