Shimano FD-R453 Service Instructions

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.

General Safety Information

Technical Service Instructions

SI-5K90A

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 carr ied 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.

• 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 super-narrow 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.

Front
chainrings

Rear
sprockets

FD-R453

Front derailleur

Installation of the front derailleur

Front shifting (SL-R661 / R441)

Adjust and then install the front derailleur as shown in the illustration.
Do not remove the Pro-Set alignment block at this time.

1mm

3mm

Gear teeth should
come within this
range

Pro-Set gauge

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.

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.

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.

3. Top adjustment

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

Largest

sprocket

Smallest
chainring

Chain position

Pro-Set alignment block

Pull

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.

Smallest
sprocket

Largest

chainring

Chain position

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.

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.

Largest

sprocket

Intermediate

chainring

Chain position

Chain guide

inner plate

Top adjustment
screw

Chain guide
outer plate

Chain

Chain

Be sure to read these service instructions in conjunction with the service
instructions for the SL-R661 / R441 before use.

Pro-Set alignment block

Smallest
sprocket

Largest

chainring

Chain position

Low adjustment

screw

Chain guide

inner plate

Chain

Top adjustment

screw

Chain guide
outer plate

Chain

6. Troubleshooting chart

After completion of steps 1 - 5, 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 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.

If there is interference between the chain
and the front derailleur inner plate when
the chain is on the smallest chainring and
the largest sprocket

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 1/8 turn).

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

Loosen the outer casing adjustment
barrel counterclockwise (

1or2turns

).

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

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

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

Chainwheel
(largest chainring)

Chain guide

Tightening torque:

5 - 7 N·m {44 - 60 in. lbs.}

Both lever (A) and lever (B) always return to the initial position when they are released
after shifting.
When operating one of the levers, always be sure to turn the crank arm at the same time.

To shift from a small chainring to a larger chainring

When lever (A) is pressed once, there is a shift of one step from
a small chainring to a larger chainring.

Example:

from intermediate chainring
to largest chainring.

Lever (A) initial position

To shift from a large chainring to a smaller chainring

When lever (B) is pressed once, there is a shift of one step from
a large chainring to a smaller chainring.

Example:

from largest chainring
to intermediate chainring.

Lever (B)

When lever (B) is operated, there is one click
where trimming (the noise prevention
mechanism) engages, and a second stronger
click when the gear shift stroke is completed.
After trimming, the next push will complete the
gear shift stroke.

Trimming (noise prevention operation)

If the chain is on the large front chainwheel and the larger rear
sprocket, the chain will rub in the front derailleur plate,
producing a characteristic noise.When this happens, press
lever (B) lightly (to the point where it clicks);this causes the
front derailleur to move slightly towards the smaller chainwheel,
thereby eliminating the noise.

Gear shift
complete stroke

Click

Trim operation

Click

Lever (B)

Movement of the front
derailleur

Chain position

A

B

Outer casing adjustment barrel

One Holland, Irvine, California 92618, U.S.A. Phone: [phone]

Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: [phone]

3-77 Oimatsu-cho Sakai-ku, Sakai, Osaka 590-8577, Japan

Please note: specifications are subject to change for improvement without notice.(English)
© Apr. 2006 by Shimano Inc. XBC SZK Printed in Japan.

These service instructions are
printed on recycled paper.

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

Shifting lever

Series

TIAGRA

SL-R661 / SL-R441

Outer casing

SIS-SP41

Gears

27

Front derailleur

FD-R453

Front chainwheel

FC-4503

Rear derailleur

RD-4500-GS

Freehub

FH-4500

Cassette sprocket

CS-HG50-9

Chain
Bottom bracket cable guide

CN-HG53
SM-SP17

Specifications

Type Band type / Brazed on type
Front chainwheel tooth difference 20 teeth or less
Min. difference between top and

intermediate

11T

Front derailleur
installation band diameter

S (ø28.6mm),

M (ø31.8mm), L (ø34.9mm)

Chainstay angle (C)

63° - 66°

Chain line 45mm

Chainstay
angle

Intermediate

chainring

Largest

chainring

Smallest
chainring

Adjustment point