Shimano CN-7800 Service Instructions

General Safety Information

Chain toolChain

WARNING

Note

• Use neutral detergent to clean the chain. Do not use alkali-based or
acid based detergent such as rust cleaners as it may result in damage
and/or failure of the chain.

• Use the reinforced connecting pin only for connecting the narrow type
of chain.

• If connecting pins other than reinforced connecting pins are used, or if
a reinforced connecting pin or tool which is not suitable for the type of
chain is used, sufficient connection force may not be obtained, which
could cause the chain to break or fall off.

10-speed super narrow
chain such as CN-7800

Reinforced

connecting pin

TL-CN32 /TL-CN23

5.5 mm

with groove

• If it is necessary to adjust the length of the chain due to a change in
the number of sprocket teeth, make the cut at some other place than
the place where the chain has been joined
using a reinforced connecting pin. The
chain will be damaged if it is cut at a place
where it has been joined with a reinforced
connecting pin.

• When readjusting the length of the chain,
be sure to insert the reinforced connecting pin from the same side as
the chain cutter was inserted (the same direction as when the chain
was cut).

• 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 and cause
serious injury.

• 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.

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

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

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

Please note: specifications are subject to change for improvement without notice. (English) © May. 2004 by Shimano Inc. XBC SZK Printed in Japan

These service instructions are
printed on recycled paper.

Technical Service Instructions SI-08D0D

Special connecting pin for

narrow-type chain

(Reinforced Connecting Pin)

CN-7800

Guide

Reinforced connecting pin

%

Features

• In order to provide greater connecting
strength, this reinforced connecting pin
has a special shape (the pin is thicker at
both ends than at the barrel). A guide for
making the pin easier to push into the
chain is also provided.

%

Method of use

(1) Push in (2) Press (3) After pressing (4) Break off the

excess part

NOTE

Be sure to check that the
connecting pin protrudes
uniformly from the link surfaces
at both ends after the chain has
been joined.

Chain tool

Link surface

Connecting pin

As illustrated in Fig.A, we strongly recommend
to set the connecting pin in the hole of the
outer link on the front side in the direction of
travel. The chain’s level of strength is
enhanced compared to the method in Fig.B.

Connecting pin

Chain’s direction
of travel

Connecting pin

Link Pin

Reinforced Connecting Pin

Link Pin

When this chain is shipped from the factory, it has outer links
at both ends. When connecting the chain, first cut either end
of the chain so that there is an inner link at that end.

5

X

3

-

-

G

B

S