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Keep the oil clean. If the oil becomes dirty, muddy, or water or other
volatile substances get in, it will affect the performance of the pump,
and the oil should be replaced. To replace the oil, start the pump and
run it for about 30 minutes to make the oil thin. Then stop the pump
and drain the oil from the oil drain plug. Open the gas inlet and run the
pump for 1-2 minutes while adding a small quantity of clean oil to the
gas inlet. This is to replace the residual oil from the inside of the pump.
After ensuring that the pump is clean, put the drain plug back in and fill
the clean pump oil from the gas inlet to the oil level.
To store the pump when not in use for long periods of time, cover the
oil cap and exhaust cap (if applicable) and store it in a dry place.
Repair of the pump should only be done by a qualified service
technician.
TROUBLESHOOTING GUIDE
Problem
Possible Cause
Correction
Low Degree Of Vacuum
1. Insufficient oil
1. Add oil up to the oil level line
2. Dirty oil
2. Replace the oil
3. Oil intake is blocked
3. Clean the oil intake or filter
4. Hose or gas inlet is clogged
4. Check the connecting pipes
5. Pump is unsuitable for the
application
5. Get a suitable pump for the
application
Oil Leaks
1. Oil seal is damaged
1. Replace the oil seal
2. Housing gasket is loose or
worn out
2. Replace the housing gasket
Oil Spray
1. Too much oil
1. Adjust the oil level to the
recommended level
2. Gas inlet pressure is too high
or too much gas has been
pumped
2. Use a bigger pump or reduce
gas inlet pressure
Starting Difficulty
1. Oil temperature is too low
1. Attempt to start the pump
multiple times to warm the oil
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