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A = Full
E
B = Add
C = Oil drain plug
D = Oil level sight glass
E = Oil fill plug
Fig. 4
CLEANING THE AIR FILTERS
A dirty air filter will
reduce the compressor's
performance and life. To
avoid any internal
contamination of the pump,
the filters should be cleaned
frequently, and replaced on
a regular basis. Paper filters
should be replaced when
dirty. Do not allow the filters
to become filled with dirt or
paint. If the filter becomes
filled with paint, it should be replaced. Direct exposure to dirty conditions or
painting areas will void your warranty.
Note: Troubleshooting problems may have similar causes and solutions.
PROBLEM
Excessive current
Low voltage/motor overload
draw trips circuit
breaker or motor reset
Drive belt tension too tight
switch
Restricted air passages
Compressor stalls
Low voltage to motor
Low discharge
Air leaks
pressure
Leaking valves
Restricted air intake
Blown gaskets
Compressor pump
Loose motor pulley or pump flywheel Retighten pulley and flywheel. Check alignment.
knocking
Low oil level in pump crankcase
Restricted air intake
Oil in discharge air
Oil level too high
Overheating
Poor ventilation
Dirty cooling surfaces
Restricted air passages
Excessive belt wear
Pulley out of alignment
Improper belt tension
Pulley wobbles
200-2998
D
C
A = Wing nut(s)
B = Metal cover(s)
C = Filter element(s)
A
B
C
TROUBLESHOOTING
POSSIBLE CAUSE
MAINTENANCE
Perform the following
maintenance at the
intervals indicated
below.
Inspect air filters
(clean or replace as
necessary)
Check pump oil level
Change pump oil
(Use synthetic blend,
non detergent air
compressor oil.)
Check belt tension
Check and tighten
all bolts (do not over
Fig. 5
tighten)
SOLUTION
Check that power supply is adequate and that compressor is on a
dedicated circuit.
Readjust belt tension.
Inspect and replace transfer tubes or the check valve.
Furnish adequate power.
Tighten or replace leaking fittings or connections. Do not overtighten.
Contact a qualified service center.
Clean or replace air filter elements.
Contact a qualified service center.
Keep oil at proper level at all times.
Clean or replace the air filter elements.
Reduce to proper level.
Relocate compressor to an area with cool, dry, well circulated air, at
least 12 in. from nearest wall.
Clean all cooling surfaces thoroughly.
Inspect and replace transfer tubes or the check valve.
Realign pulley with compressor flywheel.
Readjust.
Replace the pulley and check for a damaged crankshaft or flywheel.
SERVICE INTERVAL
Daily or
Every 100
after each
operating
use
hours
•
•
•
•
After first 8
hours and
then every
100 operating
hours
•
5
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