Shimano INTER 8 HUB - TECHNICAL Service Instructions

General Safety Information
WARNING
– To avoid serious injuries:
When securing the brake arm to the frame, be sure to
securely tighten the clip screw and clip nut to the
specified tightening torque. Use lock nuts with nylon
inserts (self-locking nuts) for the clip nut. It is
recommended that standard Shimano parts be used for
the clip screw, clip nut and brake arm clip. 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.
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 grease to the inside of the hub,
otherwise the grease will come out again.
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.
SG-8R20
Inter-8 Hub
SG-8R25
CJ-8S20
Cassette joint
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.
Installation of the cassette joint to
the hub
1.
Install the driver cap to the driver on the right side of the
hub body.
Driver cap
Driver
Driver cap
2.
Turn the cassette joint pulley in the direction of the
arrow in the illustration to align the red
pulley and the bracket. With the cassette joint in this
condition, install it so that the red
cassette joint is aligned with the red
side of the hub body.
Should be aligned
CJ-8S20
JAPAN
Cassette joint
Align the red
marks to install.
Right side of
the hub body
3.
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
the cassette joint pulley, and then turn the cassette joint
fixing ring 45° clockwise.
SI-34R0B
Align the
yellow marks
to install.
Cassette joint pulley
Turn 45°
Cassette joint fixing ring
CJ-8S20
JAPAN
Fit the cassette joint
bracket securely.
Installation of the hub to the frame
1.
Mount the chain on the sprocket, and then set the hub
axle into the fork ends.
Note the
direction
JAPAN
CJ-8S20
2.
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 fork ends. If this is done, the
cassette joint can be installed so that it is almost parallel
to the chainstay.
Non-turn washer (for left side)
marks on the
mark on the
mark on the right
Chainstay
Different types of left and right non-turn washers
are available for use with standard and reversed
fork ends. Use whichever non-turn washers are
Pulley
suitable.
Bracket
Fork end
5R / Yellow
Standard
7R / Black
Reversed 6R / Silver
Reversed
5R / Yellow
(full chain case)
CJ-8S20
JAPAN
Mark
7 R
Align the red
marks to install.
The projecting parts should be
on the fork end side.
Install the non-turn washers so that the
projecting parts is securely in the fork end
grooves on either side of the hub axle.
3.
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.
mark on
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
Cassette joint
fixing ring 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.
Brake arm clip
Chainstay
CJ-8S20
JAPAN
Brake arm
Tightening torque:
20 – 25 Nm {174 – 217 in. lbs.}
4.
Take up the slack in the chain and secure the wheel to
the frame with the cap nuts.
Hub axle
Fork end
Note:
When installing a part such as a mudguard stay to
the hub axle, install in the order shown in the
illustration below.
Cassette joint
Groove of fork end
Non-turn
washer
(for right side)
PA JA
N
J- C
8S
20
5.
Fix the brake arm of the Inter-M brake securely to the
chainstay with the brake arm clip.
Brake arm clip
Non-turn washer
Mark/Color
Size
Right Left
5L / Brown
20
7L / Gray 38
6L / White = 0
5L / Brown = 0
Chainstay
Note:
When installing the brake arm clip, securely
tighten the clip screw while holding the clip nut
with a 10 mm spanner.
Tightening torque:
2 – 3 Nm {17 – 26 in. lbs.}
After installing the brake arm clip, check that the
clip screw protrudes about 2 – 3 mm from the
surface of the clip nut.
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.
Please note: Specifications are subject to change for improvement without
notice. (English)
Brake unit fixing nut
One Holland Irvine CA 92618 U.S.A. Phone 949-951-5003
Industrieweg 24 NL-8071 CT Nunspeet‚ Holland Phone 31-341-272222
3-77 Oimatsucho‚ Sakai‚ Osaka‚ Japan Phone 072-223-3243
Tightening torque:
30 – 45 Nm
{260 – 390 in. lbs.}
JA
PA
N C
J-
8S
20
Cap nut
Non-turn washer
Non-turn washer
JA
PA
N C
8S J-
20
Washer
Cap nut
Mudguard stay
Carrier 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.
Brake arm
Brake arm
Clip nut Brake arm clip
Clip screw
2 – 3 mm
(M6 16 mm)
C Jul. 2003 by Shimano Inc. PIT. SZK. Printed in China