Shimano FC-R345, FC-R450, FC-R453 Service Instructions

Use the special plug tool (TL-FC15) to remove the FC-R450 / FC-R453 / FC-R345
crank arm.

1. Remove the fixing bolt and washer from the crank arm.

2. Insert the TL-FC15 into the hole of the bottom bracket axle.

3. Then, screw the cotterless crank arm

extractor (TL-FC10) into the crank arm, and
then remove the crank arm in the same way
as normal.

General Safety Information

Specifications

Installation of the front chainwheel

Installation of the Bottom Bracket

Installation of the chainrings

130 mm 130 / 74 mm

52 - 39T 50 - 39 - 30T

FC-R450 FC-R453

CN-HG53

BB-ES25

B.C. 9/16" x 20T.P.I. (English thread)

170, 175 mm 170, 175 mmCrank arm length

Pedal threads

Applicable chain

Applicable bottom bracket

SG chainwheel teeth

Bolt circle diameter

Model number

Front Chainwheel

1. Place the crank arm onto the bottom bracket spindle so

that it meshes with the serrations on the spindle.

2. Install the washer and fixing bolt and tighten the fixing
bolt.

Smooth shifting will not be possible if the chainrings are incorrectly
installed, so be sure to install the chainrings in the correct positions.

Tightening torque:

35 - 50 N·m {305 - 435 in. lbs.}

Adapter/bottom bracket

tightening torque:

50 - 70 N·m {435 - 608 in. lbs.}

* Service Instructions in further languages are available at :

http://techdocs.shimano.com

Please note: specifications are subject to change for improvement without notice.(English)
© Dec. 2010 by Shimano Inc. XBC IZM Printed in Malaysia.

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-shi, Osaka 590-8577, Japan

Washer

Fixing bolt

10 mm Allen key (FC-R450 / FC-R453)
8 mm Allen key (FC-R345)

Crank arm

< FC-R450 / R345 >

Use the special tool (TL-UN74-S) to
install the bottom bracket. First install
the main body, then the adapter.

113 mm 121 mm

Double Triple

BB-ES25

68 mm (1.37 X 24 T.P.I.)
70 mm (M36 X 24 T.P.I.)

43.5 mm 45 mm

110 mm

50 - 34T

FC-R345

170, 175 mm

113 mm

Double

43.5 mmChain line

Shell width
(Thread dimensions)

Type

Spindle length

Model number

Bottom Bracket

Replacing the front chainwheel

WARNING

• Be careful not to let the cuffs of your clothes get caught in the chain
while riding, otherwise you may fall off the bicycle.

• Check that the tension of the chain is correct and that the chain is not
damaged. If the tension is too weak or the chain is damaged, the
chain should be replaced. If this is not done, the chain may break
cause serious injury.

• Check that there are no cracks in the crank arms before riding the
bicycle. If there are any cracks, the crank arm may break and you
may fall off the bicycle.

• Obtain and read the service instructions carefully prior to installing
the parts. Loose, worn or damaged parts may cause the bicycle to
fall over and serious injury may occur as a result. We strongly
recommend only using genuine Shimano replacement parts.

• Obtain and read the service instructions carefully prior to installing
the parts. If adjustments are not carried out correctly, the chain may
come off and this may cause you to fall off the bicycle which could
result in serious injury.

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

• If the chain is on the smallest or intermediate chainring, there is the
danger of injury from the tips of the teeth on the largest chainring.

Note

• Make sure that the chainring combination matches the front chain
wheel tooth configuration in the Product Specification table. If other
combination are used, the distance between the chainrings will be
incorrect and the chain might slip off and get caught in between them.

• Be sure to use only the applicable chain and bottom bracket.

• Before riding the bicycle, check that there is no play or looseness in
the connection. Also, be sure to retighten the crank arms and pedals
at periodic intervals.

• If you feel any looseness in the bottom bracket axle, the bottom
bracket should be replaced.

• In addition, if pedaling performance does not feel normal, check this
once more.

• Do not wash the bottom bracket with high-pressure jets of water.

• Apply grease to the bottom bracket before installing it.

• To ensure the best performance, be sure to use only the specified
type of chain. The wide type of chain cannot be used.

• If the chain keeps coming off the chainrings during use, replace the
chainrings and the chain.

• You should periodically wash the chainrings in a neutral detergent
and then lubricate them again. In addition, cleaning the chain with
neutral detergent and lubricating it can be an effective way of
extending the useful life of the chainrings and the chain.

• The cuffs of your clothing may get dirty from the chain while riding.

• When installing the pedals, apply a small amount of grease to the
threads to prevent the pedals from sticking. Use a torque wrench to
securely tighten the pedals. Tightening torque: 35 - 55 N·m {305 - 479
in.lbs.}. The right-hand crank arm has a right-hand thread, and the
left-hand crank arm has a left-hand thread.

• 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.

TL-FC15 TL-FC10

With the marked surface
of the larger chainring
facing out, set the larger
chainring so that the chain
drop prevention pin is
lined up with the crank
arm position.

With the marked surface of the smaller
chainring facing away from the crank arm,
set the chainring so that the

o mark is
lined up with the crank arm position.
For chainrings without a marked surface,
align using the projection on the inside of
the chainring.

For the FC-R453, the tooth
number marking on the
largest chainring should
face outward, and the
markings on the
intermediate and smallest
chainrings should face
inward.

Mark

Outer side

Crank arm

Chain drop

prevention pin

< FC-R453 >

Bottom bracket

RightLeft

Crank arm

o mark

Inner side

Mark

SI-1JH0A-002-00

CAUTION

Technical Service Instructions SI-1JH0A-002

Front chainwheel

FC-R450 / FC-R453
FC-R345

FC-R450

FC-R345

FC-R345