Shimano BB-6500, FC-6500, FC-6503 Service Instructions

SERVICE INSTRUCTIONS SI-16T0B

SG

A-53

A-42

SG

SH

IMA

NO

77 Oimatsu-cho 3-cho Sakai Osaka 590-8577 Japan Phone [phone]

One Holland Irvine CA 92618 U.S.A. Phone [phone]

®

Industrieweg 24 NL-8071 CT Nunspeet Holland Phone [phone]

Installation of the front chainwheel

FC-6500
FC-6503

BB-6500

Front
Chainwheel

Bottom Bracket

Before use, read these instructions carefully, and follow them for correct use.

Product specifications

Front Chainwheel

Model number

Bolt circle diameter

Crank length

Pedal threads

Applicable chain

Applicable bottom
bracket

Bottom Bracket

Type

Chain line

Thread dimensions

Note

• Be sure to use only the FC-6500 / 6503 chainrings. If any other
type of chainrings are used, the distance between the chainrings
will be incorrect and the chain might slip off and get caught in
between them.

•

*If the smaller chainring has 39 teeth, use B-53 or B-52 as the

larger chainring. If the smaller chainring has 42 teeth, use A-53
as the larger chainring.

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

• For any questions regarding methods of handling or
maintenance, please contact the place of purchase.

Please note: specifications are subject to change for improvement without notice. (English)
© Jul 1997 by Shimano Inc. XBC SZK Printed in Japan

FC-6500 FC-6503

A-53 / 42T, B-53 / 39T,

B-52 / 39T

52 / 42 / 30TSG chainwheel teeth*

130 mm 130 / 74 mm

165 mm, 167.5 mm, 170 mm, 172.5 mm, 175 mm

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

CN-HG92 / CN-7700

BB-6500

BB-6500Model number

double Triple

109.5 mm 118.5 mmSpindle length

43.5 mm 45 mm

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

These service instructions are
printed on recycled paper and
can be recycled again

68 / 73 mm

(1.37 X 24 T.P.I)

1. Place the crank arm onto the bottom
bracket spindle so that it meshes with the

Washer

serrations on the spindle.

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

Tightening torque:

35 - 50 Nm {305 - 435 in. lbs.}

Fixing bolt

3. Lastly, attach the cap.

8 mm Allen key

Tightening torque:

Crank arm

5 - 7 Nm {44 - 60 in. lbs.}

Installation of the chainrings

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

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.

Chain drop prevention pin

With the marked surface of the
smaller chainring facing away from
the crank arm, set the chainring so
that the Uu mark is lined up with the
crank arm position.

Mark

Crank arm

IM

SH

SG

NO

A

SG

A-53

A-42

Outer side

Crank arm

Inner side

Installation of the Bottom Bracket

1. Use the special tool

Uu mark

The crank arm can be removed

•

Cap

simply by turning the fixing bolt
counterclockwise.

Note:

If installing a crank arm which has
already been used before, the
tightening torque for the cap should
also be checked.

Apply grease to the reverse side of the
cap and to the contact surface of the
fixing bolt.

SG

A-52

For the FC-6503, the tooth
number marking on the largest
chainring should face outward,
and the markings on the
intermediate and smallest
chainrings should face inward.

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

Adapter/bottom bracket tightening

50 - 70 Nm {435 - 608 in. lbs.}

torque:

­42

-

30

A52

SG

A

-30

Left

Bottom bracket

Right

Apply grease to the
bottom bracket before
installing it.