Drum Brake Service - Honda CB350 Repair Manual

CHASSIS 129
torque. The proper torque for your model
can be found in the "Chassis Torque
Specifications" chart at the end of this
chapter. Then back the nut off until a slot
in the axle nut is lined up with a hole in
the axle. Secure the axle nut in place with
a new cotter pin.
DRUM BRAKE SERVICE
All models use a single—leading shoe
rear brake, while, a twin—leading shoe is
used on the front. Hondas use brakes in
which the lining is bonded to the brake
shoe. Lining and shoe, therefore, are pur—
chased and replaced as a single unit.
1. Remove the wheel from the motor—
cycle. On the front wheel, unscrew the
axle. Remove the brake plate from the
hub.
Removing the front axle nut
2. Brakes can be inspected on the
brake plate.
3. Inspect the lining for wear. There
should be at least 0.1 in. (2.5 mm) of lin—
ing material left (measured at the linings
thinnest point) or the shoes must be re—
placed.
4. Inspect the linings for grooves or
scoring. These may be caused by par—
ticles of dirt which have entered the
drum. If badly scored, the shoes should
be replaced. If scoring ofthe shoes is evi—
dent, the drum should be inspected for
the same type of damage.
Be sure that there is no oil or grease
present on the linings. Oil—impregnated
linings must be replaced. If the linings
show this condition, determine the
source of the lubricant: defective wheel
bearing oil seals, excessive chain lube,
etc:
5. If the linings are usable, rough up
the surface with coarse sandpaper. Then
clean the linings with alcohol or laquer
thinner. Clean the brake drum with the
same solvent.
6. To disassemble the brake plate, re—
move the cotter pin(s) and washer(s) from
the brake pivot(s). Grasp each shoe and
fold them toward the center of the brake
plate. They may be installed in the same
manner.
Sanding a brake lining
Removing the cotter pin from the brake pivot
Removing the shoes from the plate