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4.16
PREVENTIVE MAINTENANCE
Book
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The heat exchanger or cooling fan is
driven
by
a multiple V-belt arrange-
ment directly from the compressor. In-
spect the cooling fan belts weekly or at
50 hour intervals.
These
V-belts
should be maintained
at the proper
tension. Fan belts that are too tight im-
pose an undue load on the fan shaft
bearings
and shorten the life of the
belts. Fan belts that are too loose al-
low slippage and lower the fan speed,
cause excessive belt wear, and can
lead to overheating of the cooling sys-
tems. The fan shaft bearing housing is
so mounted that it may be adjusted to
establish the correct belt drive tension.
BRAKE SYSTEMS
This compressor is equipped with me-
chanical parking brakes and hydraulic
surge brakes. The maintenance
of
these brake systems is required to en-
sure safe operation of this compres-
sor.
Every .'iix months
check the brake
shoes tor proper :'::;Jeri:;uion and deteri-
oration.
The
common
automotive
standards and procedures would ap-
ply in replacing the brake shoes.
•••••
When replacing brake cables it is nec-
essary to adjust the brakEtshoes
be-
fore adjusting the parking brake
sys-
tem. To adjust the shoes, remove the
rubber hole plug in the brake backing
plate and rotate the star adjusting nut
until you cannot rotate the wheel by
hand. Then back off the adjustment
ten to twelve (10-12)
notches. Note:
always rotate wheel in direction otter-
ward travel only. Replace
hole plug
and proceed to next wheel and repeat
procedure.
Adjust parking brakes after all brake
shoes have been adjusted
by:
1. Turning knob on brake lever until Ie-
ver is perpendicular
to bracket when in
"OFF"
position.
Wheels
should
turn
freely.
2.
With lever in "OFF" position, adjust
brake cables until each has approxi-
mately
the
same
tension.
Wheels
should turn freely.
3. Move lever to "ON" position. Check
each wheel to seethat it will not rotate.
If all wheels will rotate, adjust knob on
lever until brakes are fully applied. If
~ one or two wheels will still rotate, ad-
just the cables for those wheels and
recheck.
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