Promaker PRO-CP50, User Manual

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2. Clean crank case and renew lubricating oil after the first 10 working hours.
3. Check the oil level after every 20 working hours, and replenish if
necessary (Fig.5).
4. Clean crank case and renew the oil, clean air filter every three months.
5. Open the drain cock under the tank to exhaust the condensate after
every 60 working hours but less than every 7 days.
6. Check the safety valve and pressure gauge by professional
organization every 6 months
and make sure they are in
correct condition.
7. Make sure there is no rust on
the air tank and the air tank is
not damaged.
8. Check the thickness of
the air tank by professional
organization every year and
make sure the thickness is not
less than 2.1mm.
Troubles and remedies
Trouble Possibles causes Remedies
Motor unable
running. running
too slow, or
getting hot
a) Fault in line, or voltage insufficient
b) Power wire too thin or too long
c) Fault in pressure switch
d) Fault in motor
e) Sticking of main compressor
a) Check the line
b) Replace the wire
c) Repair or replace
d) Repair or replace
e) Check and repair
Sticking of
main
compressor
a) Moving parts burnt due to the oil
insufficient
b) Moving parts damaged, or stuck by
foreign body
Check crankshaft,
bearing, connecting
rod, piston, piston ring,
etc. and replace if
necessary
Terrible shake
or abnormal
noise
a) Connecting part loosed
b) Foreign body got into main compressor
c) Piston knocking valve seat
d) Moving parts seriously worn
a) Check and retighten
b) Check and clean
away
c) Replace with thicker
paper gasket
d) Repair or replace
Fig. 5