7: Maintenance 1600H T4F Perkins User Manual
02250248-733 R03
68 Subject to EAR, ECCN EAR99 and related export control restrictions.
2. If equipped, remove the adjusting hole cover
form the adjusting slot on the bottom of the
brake backing plate.
3. With a screwdriver or standard adjusting
tool, rotate the star wheel of the adjuster
assembly to expand the brake shoes. Adjust
the brake shoes out until the pressure of the
linings against the drum makes the wheel
very difficult to turn.
4. Then rotate the star wheel in the opposite
direction until the wheel turns freely with a
slight lining drag.
5. Replace the adjusting hole cover and lower
the wheel to the ground.
6. Repeat the above procedure on all brakes.
For best results, the brakes should all be set
at the same clearance.
7.6.7 Brake cleaning and inspection
Your brake system must be inspected and serviced
immediately if a loss of performance is indicated. With
normal use, servicing at one year intervals is usually ade-
quate. With increased usage, maintenance should be
performed more frequently as required. Magnets and
shoes must be changed when they become excessively
worn or scored, a condition which can reduce vehicle
braking.
Clean the backing plate, magnet arm, magnet, and brake
shoes. Make certain that all the parts removed are
replaced in the same brake and drum assembly. Inspect
for any loose or worn parts, stretched or deformed
springs and replace as necessary.
7.6.8 Brake lubrication
Before reassembling, apply a light film of grease or anti-
seize compound on the brake anchor pin, the actuation
arm bushing and pin, and the areas on the backing plate
that are in contact with the brake shoes and magnet lever
arm. Apply a light film of grease on the actuating block
mounted on the actuating arm.
7.6.9 Bearing lubrication—grease
Grease should be replaced every 12,000 miles or 12
months. Prior to repacking bearings, all old grease
should be removed from the wheel hub cavity and bear-
ings. Bearings should be packed by a packing machine, if
possible. If a packing machine is unavailable, packing by
the hand method is acceptable. The method to pack
bearing cones is as follows:
1. Place a quantity of grease onto the palm of
your hand.
WARNING
Before proceeding, park or locate the compres-
sor on flat stable ground. Block or chock both
sides of all wheels. Use proper personal protec-
tion equipment when performing these tasks
described below.
CAUTION
Potential asbestos dust hazard
Some older brake linings may contain asbestos
dust, which has been linked to serious or fatal ill-
nesses. Certain precautions need to be taken
when servicing brakes:
• Avoid creating or breathing dust.
• Avoid machining, filing or grinding the
brake linings.
• Do not use compressed air or dry
brushing for cleaning (dust can be
removed with a damp brush).
CAUTION
Do not get grease or oil on the brake linings,
drums or magnets.
CAUTION
Do not mix lithium, calcium, sodium or barium
complex greases due to possible compatibility
problems. When changing from one type of
grease to another, it is necessary to ensure all
the old grease has been removed.
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