146 Maintenance
Brake Slack Adjusters and Cam
Before checking the slack adjusters, set
the parking brakes, place the transmis-
sion in neutral and block the wheels.
Failure to do so can result in unexpected
vehicle movement and can cause serious
personal injury or death.
To check the slack adjusters for proper
throw, use a breaker bar to lever the slack
adjuster out. Measure the distance of the
travel. It should not exceed 1 to 1 1/4 in.
(25 to 30 mm) for a 6 in. slack adjuster and
should not exceed 3/4 to 1 in.
(20 to 25 mm) for a 5 1/2 in. slack ad-
juster. Also make sure that the length of the
slack adjuster is the same on an axle.
W5000613
Brake Linings
Before measuring the brake linings, set
the parking brakes, place the transmis-
sion in neutral and block the wheels.
Failure to do so can result in unexpected
vehicle movement and can cause serious
personal injury or death.
Measure the brake lining thickness. If the
brakes are equipped with backing plates,
measure through the inspection holes in the
plate. Reline the brake shoes if the lining
thickness is 1/4 in. (6 mm) or less at the
middle of the shoe.
Check the brake drums for any visible
cracks or signs of oil or grease.
W5000610
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