BRAKES
B1220, B1620, B1820, WSM
5-S11
(EU)
[3] SERVICING
Brake Cam Lever Movement
1. Move the brake cam lever by hand to check the movement.
2. If the movement is heavy, refine the brake cam with emery
paper.
9Y1210272BRS0014US0
Cam Plate Flatness and Bearing Holder Wear
1. Place a straightedge of 150 mm (5.91 in.) or more in length on
the contacting surface of the cam plate and the bearing holder.
2. Inspect the friction surface of the cam plate and the bearing
holder with the straightedge, and determine if a 0.30 mm
(0.0118 in.) feeler gauge will fit on the part of wear.
3. If it will fit, resurface.
9Y1210272BRS0015US0
Height of Cam Plate and Ball
1. Measure the dimensions of the cam plate with the ball installed.
2. If the measurement is less than the allowable limit, replace the
cam plate and balls.
3. Inspect the ball holes of cam plate for uneven wear.
4. If the uneven wear is found, replace it.
9Y1210272BRS0016US0
Brake Disc and Friction Plate Wear
1. Measure the brake disc thickness and the friction plate
thickness with an outside micrometer.
2. If the thickness is less than the allowable limit, replace it.
9Y1210272BRS0017US0
Height of cam plate and
ball
Factory specification
22.89 to 22.99 mm
0.9012 to 0.9051 in.
Allowable limit
22.40 mm
0.8819 in.
Brake disc thickness
Factory specification
3.3 to 3.5 mm
0.130 to 0.138 in.
Allowable limit
3.0 mm
0.118 in.
Friction plate thickness
Factory specification
1.92 to 2.08 mm
0.0758 to 0.0819 in.
Allowable limit
1.52 mm
0.0598 in.
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