Midland SIDE DUMP GRAVEL TRAILER Operator's Manual page 72

5.2.8 BRAKES (cont'd)
Remove the brake dust covers
(if so equipped) to access the
shoes. Check the thickness of
the linings. Reline or replace
shoes when the lining thickness
is less than 1/8 inch (3 mm).
Uneven wear among the brake
shoes on a trailer indicate that the
braking system has not been set
or maintained properly causing
uneven application and wear.
If uneven lining wear appears,
reset the system to provide even
application of all the shoes. Do
not operate when the linings
are less than 1/8 inch (3 mm) to
prevent the lining anchor rivet or
bolts from contacting the drum.
Head contact with the drum will
cut grooves in the surface and
require extra machining to remove
them when rebuilding the brakes.
Fig. 56 EXPLODED VIEW
Several types of friction material are available for
use on the brake shoes. Each has its own friction
coefficient and braking characteristics. Select the
one that best fits your application but do not mix
materials on the same trailer. Differing materials
require different application forces to obtain the same
braking force and a braking system can only apply
one force when it is properly set.
Recent changes in environmental
laws have banned the use of
asbestos including brake linings.
Always use the appropriate safety
gear when removing brake shoes
containing asbestos from your
trailer. Replace the shoes that are
equipped with approved material.
Fig. 57 AXLE
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