General Safety Information
WARNING
– To avoid serious injuries:
NOTE:
You can shift gears while pedaling, but on rare occasions
the pawls and ratchet inside the hub may produce some
noise afterwards as part of normal gear shifting operation.
The CJ-8S20 cassette joint should only be used with
sprockets from 16T to 23T.
If the wheel becomes stiff and difficult to turn, you should
lubricate it with grease.
Do not apply any lubricant to the inside of the hub,
otherwise the grease will come out.
You should periodically wash the sprockets in a neutral
detergent and then lubricate them again. In addition,
cleaning the chain with neutral detergent and lubricating it
can be a effective way of extending the useful life of the
sprockets and the chain.
If the chain keeps coming off the sprockets during use,
replace the sprockets and the chain.
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 handling or
adjustment, please contact the place of purchase.
When securing the brake arm to the frame, be sure to
use a brake arm clip that matches the size of the
chainstay, and securely tighten them with the clip screw
and clip nut to the specified tightening torque.
Use a lock nut with a nylon insert (self-locking nut) for the
clip nut. It is recommended that standard Shimano parts
be used for the clip screw, clip nut and brake arm clip.
In addition, use a brake arm clip that matches the size of
the chainstay.
If the clip nut comes off the brake arm, or if the clip screw
or brake arm clip becomes damaged, the brake arm may
rotate on the chainstay and cause the handlebars to jerk
suddenly, or the bicycle wheel may lock and the bicycle
may fall over, causing serious injury.
When installing the hub to the frame, be sure to install
the correct non-turn washers to the left and right sides,
and securely tighten the hub nuts to the specified
torques. If the non-turn washers are installed to one side
only, or if the hub nuts are not tightened sufficiently, the
non-turn washer may fall out, which could cause the hub
axle to rotate and the cassette joint to turn. This may
then cause the handlebars to be accidentally pulled by
the shifting cable, and an extremely serious accident
could result.
Obtain and read the service instructions carefully prior to
installing the parts. Loose, worn, or damaged parts may
cause serious injury to the rider.
We strongly recommend only using genuine Shimano
replacement parts.
Check that the wheels are fastened securely before
riding the bicycle. If the wheels are loose in any way,
they may come off the bicycle and serious injury may
result.
Read these Technical Service Instructions carefully, and
keep them in a safe place for later reference.
Technical Service Instructions
Be sure to read these service instructions in conjunction
with the service instructions for the Inter-M Brake and the
Inter-8 shifting lever before use.
SI-34R0D
SG-8R20
SG-8R25
CJ-8S20
Inter-8 Hub
Cassette joint
Left
Dropouts
Non-turn washer
Reversed
Standard
5R/Yellow
6R/Silver
5L/
Brown
6L/White
Mark/Color
Size
Right
7R/Black 7L/Gray
Reversed
(full chain case)
5R/Yellow
= 0
= 0
5L/
Brown
7R
JAPAN
MIN 2Nm
CJ-8S20
JAPAN
LOCK
6R
CJ-8S20
JAPAN
LOCK
CJ-8S20
JAPAN
LOCK
7R
JAPAN
MIN 2Nm
GREASE
7R
CJ-8S20
JAPAN
LOCK
Jul. 2006 by Shimano Inc. PIT. SZK. Printed in Japan
C
When installing the brake arm clip, securely
tighten the clip screw while holding the clip nut
with a 10 mm spanner.
Note:
After installing the brake arm clip, check that the
clip screw protrudes about 2 – 3 mm from the
surface of the clip nut.
Brake arm
Brake arm clip
Clip screw
(M6 16 mm)
Take up the slack in the chain and secure the wheel to
the frame with the cap nuts.
2 – 3 mm
Non-turn washer
Cap nut
Tightening torque:
2 – 3 N·m {17 – 26 in. lbs.}
Tightening torque:
30 – 45 N·m
{260 – 390 in. lbs.}
Fix the brake arm of the Inter-M brake securely to the
chainstay with the brake arm clip.
Brake arm clip
Chainstay
Brake arm
Note:
When installing a part such as a mudguard stay to
the hub axle, install in the order shown in the
illustration below.
Non-turn washer
Washer
Cap nut
Carrier stay
Mudguard stay
If excessive force is
applied to the brake
arm, the wheel will
become difficult to
turn. Make sure that
you don't apply
excessive force
when installing.
Install the brake arm of the Inter-M brake to the
chainstay with the brake arm clip, provisionally tighten
the clip screw and clip nut, and then tighten the brake
unit fixing nut.
Tightening torque:
20 – 25 N·m {174 – 217 in. lbs.}
Brake unit fixing nut
Brake arm clip
Chainstay
Brake arm
Note:
If the brake arm is in the incorrect position as
shown in the illustration so that it cannot be
provisionally installed to the chainstay, loosen the
brake unit fixing nut and turn the brake arm. Then,
after provisionally securing the brake arm to the
chainstay, tighten the brake unit fixing nut.
Cassette joint
Groove of dropout
Chainstay
Non-turn
washer
(for right side)
Installation of the hub to the frame
Mount the chain on the sprocket, and then set the hub
axle into the dropouts.
Hub axle
Dropout
The projecting parts should be
on the dropouts side.
Install the non-turn washers so that the
projecting parts is securely in the dropouts
grooves on either side of the hub axle.
Use whichever non-turn washers match the
shape of the dropouts. Different non-turn washers
are used at the left and right sides.
Place the non-turn washers onto the right side and left
side of the hub axle. At this time, turn the cassette joint
so that the projecting parts of the non-turn washers fit
into the grooves of the dropouts. If this is done, the
cassette joint can be installed so that it is almost parallel
to the chainstay.
Mark
Non-turn washer (for left side)
Vertical
8R/Blue
8L/Green
20
38
= 60 – 90
These service instructions are printed on recycled paper.
Please note: Specifications are subject to change for improvement without
notice. (English)
These service instructions explain how to use and maintain
the Shimano bicycle parts which have been used on your
new bicycle. For any questions regarding your bicycle or
other matters which are not related to Shimano parts‚ please
contact the place of purchase or the bicycle manufacturer.
Clip nut
5.
4.
1.
2.
3.
One Holland, Irvine, California 92618, U.S.A. Phone: +1-949-951-5003
Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: +31-341-272222
3-77 Oimatsu-cho, Sakai-ku, Sakai, Osaka 590-8577, Japan
CJ-8S20
JAPAN
LOCK
CJ-8S20
JAPAN
LOCK
CJ-8S20
JAPAN
CJ-8S20
JAPAN
Right side of
the hub body
Cassette joint fixing ring
Cassette joint fixing ring
Cassette joint pulley
Align the
yellow marks
to install.
Turn the cassette joint pulley in the direction of the
arrow in the illustration to align the red
marks on the
pulley and the bracket. With the cassette joint in this
condition, install it so that the red
mark on the
cassette joint is aligned with the red
mark on the right
side of the hub body.
Pulley
Bracket
Cassette joint
Should be aligned
Secure the cassette joint to the hub with the cassette
joint fixing ring. When installing the cassette joint fixing
ring, align the yellow
mark with the yellow mark on
the cassette joint pulley, and then turn the cassette joint
fixing ring 45
°
clockwise.
Fit the cassette joint
bracket securely.
Turn 45
°
Align the red
marks to install.
Align the red
marks to install.
2.
3.
Install the driver cap to the driver on the right side of the
hub body.
Driver cap
Driver cap
Driver
Note the
direction
Installation of the cassette joint
to the hub
1.
Installation of the sprocket to the
hub
Place right hand dust cap B onto the driver on the right side
of the hub body. Next, install the sprocket and secure it in
place with the snap ring.
Snap ring
Sprocket
Right hand
dust cap B
Driver
Note the
direction
If the sprocket is a 16T thick tooth inward assembling
sprocket or for belt drive specifications, right hand dust
cap B cannot be installed and so it should not be used.
Note:
