Shimano SG-8C20 Technical Service Instruction - Page 3
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Installation of the hub to the frame
1.
Mount the chain on the sprocket, and then set the hub
axle into the fork ends.
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)
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
suitable.
Fork end
Right
5R / Yellow
Standard
7R / Black
6R / Silver
Reversed
Reversed
5R / Yellow
(full chain case)
Mark
7 R
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.
Hub axle
Fork end
Cassette joint
Groove of fork end
Non-turn
washer
(for right side)
Non-turn washer
Mark/Color
Size
Left
5L / Brown
20
7L / Gray
38
6L / White
= 0
5L / Brown
= 0
3.
Take up the slack in the chain and secure the wheel to
the frame with the cap nuts.
Non-turn washer
4.
Fix the brake arm securely to the chainstay with the
brake arm clip.
Brake arm
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 N·m {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.
Brake arm
Clip nut
2 – 3 mm
5.
Before using the Coaster Brake, check that the brake
works properly and that the wheel turns smoothly.
Tightening torque:
30 – 45 N·m
{260 – 390 in. lbs.}
Cap nut
Clip nut
Clip screw
Brake arm clip
Chainstay
Brake arm clip
Clip screw
(M6
16 mm)