Shimano FD-4503 Front Derailleur Service Instructions

Shimano FD-4503 Front Derailleur Service Instructions
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 nextlarger rear sprocket or the one after.
In order to realize the best performance, we recommend that the following
combination be used.
Series
TIAGRA
Be sure to follow the sequence described below.
Shifting lever
ST-4500
1. Low adjustment
Outer casing
SIS-SP41
Gears
FD-4503
Front chainwheel
FC-4503
Rear derailleur
Freehub
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).
Smallest
chainring
Pro-Set alignment block
Intermediate
chainring
Largest
chainring
FH-4500
Cassette sprocket
CS-HG50-9
Chain
CN-HG53
Bottom bracket cable guide
SM-SP17
Adjustment point
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.
Low adjustment
screw
Chain position
Largest
sprocket
Specifications
Type
Band type / Brazed on type
Front chainwheel tooth difference
Intermediate
chainring
Chain guide
inner plate
Chainstay
angle
20 teeth or less
Chain
11T
S (ø28.6mm),
M (ø31.8mm), L (ø34.9mm)
Chainstay angle (C)
B
Chain guide
inner plate
A
Outer casing adjustment barrel
63° - 66°
Chain line
• 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 supernarrow type of chain. The wide type of 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.
Chain position
Largest
sprocket
RD-4500-GS
Front derailleur
installation band diameter
Rear
sprockets
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.
27
Front derailleur
Min. difference between top and
intermediate
Front
chainrings
SIS adjustment
Chain
2. Connection and securing of cable
45mm
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.}
Front shifting (ST-4500)
5. Trimming mechanism adjustment and checking
While turning the crank arm, gently operate lever (b) and check that
the front derailleur moves slightly toward the smallest chainring. If the
front derailleur moves by a large amount and the chain is set onto the
smallest 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.
Top adjustment
screw
Lever b
From large chainring
to small chainring
Lever b
Chain position
Pull
Lever a
From small chainring
to large chainring
Lever a
Smallest
sprocket
After taking up the initial slack in the cable, re-secure
to the front derailleur as shown in the illustration.
Largest
chainring
Chain guide
outer plate
Chain
6. Troubleshooting chart
Installation of the front derailleur
After completion of steps 1 - 5, move the shifting lever to check the
shifting. (This also applies if shifting becomes difficult during use.)
3. Top adjustment
Set so that the clearance between the chain guide
outer plate and the chain is 0 - 0.5 mm.
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
Technical Service Instructions SI-5K80A
Pro-Set gauge
Chain position
Smallest
sprocket
FD-4503
Top adjustment
screw
Largest
chainring
1mm
Front derailleur
Chain guide
outer plate
3mm
Chain
These service instructions are
printed on recycled paper.
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.
Chainwheel
(largest chainring)
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, Osaka 590-8577, Japan
Please note: specifications are subject to change for improvement without notice. (English)
© Mar. 2006 by Shimano Inc. XBC SZK Printed in Japan.
Tightening torque:
5 - 7 N·m {44 - 60 in. lbs.}
Chain guide
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.
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 1/8 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 1/8 turn).
If there is interference between the chain Loosen the low adjustment screw
and the front derailleur inner plate when
counterclockwise (about 1/8 turn).
the chain is on the smallest chainring and
the largest sprocket
Be sure to read these service instructions in conjunction with the service
instructions for the ST-4500 before use.
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