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Before doing any maintenance or adjustments to your air compressor, the following safety
precautions should be taken:
A ： DISCONNECT ELECTRICAL POWER.
B ： DRAIN AIR RECEIVER OF AIR PRESSURE.
8 ： MAINTENANCE CHECKLIST
8-1 ： Daily Checklist
8-1-1 ： Check oil level.
8-1-2 ： Drain condensation from air receiver tank.
8-1-3 ： Check for any unusual noise or vibration.
8-1-4 ： Be sure all nuts and bolts are tight.
8-2 ： Weekly Checklist
8- 2-1 ： Clean air filter by opening air filter cap. Replace air filter if necessary.
8- 2-2 ： Check oil level and fill up if necessary.
8-3 ： Quarterly or 300 Hour Checklist
8-3-1 ： Change compressor oil and filter element.
8-3-2 ： Check safety valve.
8-3-3 ： Check pressure switch to ensure compressor head unloads whenever motor
shuts down.
8-3-4 ： Clean and blow off pump fins and motor.
8-3-5 ： Inspect air system for leaks by applying soapy water to all joints. Tighten
joints if leakages are observed。
9 ： STORAGE - WHEN YOU HAVE FINISHED USING THE AIR COMPRESSOR ：
9-1 ： Set the pressure switch to "OFF" and unplug the power cord.
9-2 ： Be sure to drain the water from the air tank.
9-3 ： Protect the electrical cord and air hose from damage.
9-4 ： Store the air compressor in a clean and dry location.
9
10 ： TROUBLESHOOTING ：
CONDITION
CAUSE
Compressor does not
1 ： Loose electrical connection.
start.
2 ： Motor overheated.
Low pressure.
1 ： Air leak in safety valve.
2 ： Loose tube fittings.
3 ： Restricted air filter.
4 ： Defective check valve.
Safety valve releasing on
1 ： Defective pressure switch or
air receiver tank.
improper adjustment.
2 ： Defective safety valve.
Oil discharge and
1 ： Improper oil viscosity.
excessive carbon
formation or appearance
2 ：Oil in crankcase overfilled.
of water and oil in the air
lines.
3 ： Restricted air intake filter.
4 ： Carbon exhaust valves.
5 ： Worn valves.
6 ： Worn piston rings.
7 ： High ambient temperature
and/or humidity.
8 ： High percentage of running
time.
Excessive noise.
1 ： Loose valve.
2 ： Noisy only during start up.
3 ： Piping loose.
4 ： Unit not installed level.
5 ： Improper grade of oil in
crankcase.
6 ： Carbon or foreign material on
piston.
7 ： Worn bearings.
CORRECTIVE ACTION
1 ： Check wiring connection.
2 ： Press reset button or wait for
automatic reset.
1 ： Pull upward on safety valve
ring. If condition persists,
replace valve.
2 ： Tighten fittings.
3 ： Clean or replace.
4 ： Replace safety valve.
1 ： Check for proper adjustment and
if problem persists,
replace pressure switch.
2 ： Replace safety valve.
1 ： Replace oil with SAE10W-30
non-detergent compressor oil.
2 ： Drain oil and fill to proper level.
3 ： Clean or replace filter.
4 ： Clean or replace.
5 ： Replace valve assembly.
6 ： Replace piston ring.
7 ： Install a moisture separator and/or
dryer, followed by an oil filter.
8 ： Check for air leakage. If no leaks
are found you may require an
additional compressor unit as
your air demand is too much
for existing unit.
1 ： Inspect valve for damage; replace
as required.
2 ：Adjust belt to correct tension.
3 ： Tighten as required.
4 ： Ensure that unit is mounted level.
5 ： Replace oil with SAE10W-30
non-detergent compressor oil.
6 ： Clean piston. Check cylinder
walls for scoring.
7 ： Replace main bearings.
10
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