Shimano FC-4503, FD-4503, ST-4500 Service Instructions

General Safety Information

Technical Service Instructions SI-0033A

TIAGRA

ST-4500

Series

Shifting lever

SP41

Outer casing

27

Gears

FD-4503

Front derailleur

FC-4503

Front chainwheel

RD-4500-GS

Rear derailleur

FH-4500

Freehub

CS-HG50-9

Cassette sprocket

CN-HG53

Chain

SM-SP17

Bottom bracket cable guide

Operate lever (a) until
gear shifting is complete.

Operate lever (b) until
gear shifting is complete.

Type of shifting Lever operation

Trimming operation

Lever

operation

Front derailleur movement

Chain

position

Symptom

• 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.

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

Note

• Operation of the levers related to gear shifting should be made
only when the front chainwheel is turning.

• 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.

• Use a frame with internal cable routing is strongly discouraged
as it has tendencies to impair the SIS shifting function due to
its high cable resistance.

• A special grease is used for the gear shifting cable (SIS­SP41). Do not use DURA-ACE grease or other types of
grease, otherwise they may cause deterioration in gear shifting
performance.

• Please refer to the Service Instructions for the ST-4500 for
details on installation and maintenance.

• Be sure to read these service instructions in conjunction with
the service instructions for the FD-4503 before use.

• 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.

WARNING

Gear shifting operations Trimming (noise prevention mechanism) operation

Front
DUAL CONTROL
Lever

ST-4500

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

Lever (b) will also move when lever (a) is operated, but be
careful not to apply pressure to lever (b) . Similarly be careful
not to press lever (a) when operating lever (b) . Gears will not
shift when both levers are pressed simultaneously.

Depending on the position of the chain after shifting, the chain may rub against the chain guide outer
plate or the chain guide inner plate of the front derailleur, producing a characteristic noise. If this sort
of thing happens, you can press lever (a) or lever (b) slightly to move the front derailleur a little way so
that it does not touch the chain. This operation is called "trimming". Trimming can be carried out
whether the chain is on the largest, intermediate or smallest chainring. If noise occurs when the chain
is in one of the positions shown below, carry out trimming to eliminate the noise.

Chain contacts
outer plate

Chain contacts
inner plate

Smallest
chainring

Intermediate
chainring

/

Intermediate
chainring

Largest
chainring

/

Largest
chainring

Intermediate
chainring

/

Intermediate
chainring

Smallest
chainring

/

Lever (a)

Lever (a)

Lever (b)

Lever (b)

Largest
chainring

Front derailleur movement

Front derailleur movement

Outer plate

Chain

Click

(Hits)

Click

(Hits)

Smaller
sprockets

Smaller
sprockets

Smaller
sprockets

Intermediate
chainring

Smallest
chainring

Largest
chainring

Intermediate
chainring

Smallest
chainring

Larger sprockets

Larger sprockets

Larger sprockets

Inner plate

Chain

Lever (a)

Lever (b)

Before

trimming

trimming

operation

After

trimming

Before

trimming

trimming

operation

After

trimming

Lever (a)

Lever (b)

These service instructions are printed on recycled paper. Please note: specifications are subject to change for improvement without notice. (English) © Mar. 2006 by Shimano Inc. XBC SZK Printed in Japan.

One Holland, Irvine, California 92618, U.S.A. Phone: [phone] Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: [phone] Oimatsu-cho Sakai-ku, Sakai, Osaka 590-8577, Japan