Servicing - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

[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.
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.
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.
Factory specification
Height of cam plate and
ball
Allowable limit
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.
Factory specification
Brake disc thickness
Allowable limit
Factory specification
Friction plate thickness
Allowable limit
5-S11
BRAKES
9Y1210272BRS0014US0
9Y1210272BRS0015US0
22.89 to 22.99 mm
0.9012 to 0.9051 in.
22.40 mm
0.8819 in.
9Y1210272BRS0016US0
3.3 to 3.5 mm
0.130 to 0.138 in.
3.0 mm
0.118 in.
1.92 to 2.08 mm
0.0758 to 0.0819 in.
1.52 mm
0.0598 in.
9Y1210272BRS0017US0
(EU)
KiSC issued 07, 2011 A