9
ENGLISH
Replacing the oil
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Fig.9:
1.
Intake shut-off valve
2.
Drain plug
1.
Open the intake shut-off valve.
2.
Operate the pump for 1 or 2 minutes to warm up the
oil.
3.
Turn the pump off.
4.
Remove the drain plug and drain the oil.
5.
Refer to “Adding oil” and add new oil.
•
Dispose of the old oil in accordance with local
regulations.
NOTE:
It is recommended to change the oil after
20 hours of usage to protect pump components from
contaminants pulled into the pump.
When vacuuming on old refrigeration systems, change
the oil after every usage.
Vacuum pump oil:
The condition and type of oil used in any high performance
vacuum pump are extremely important in determining
the ultimate attainable vacuum. It is recommended to
use the High Performance Vacuum Pump Oil, which is
specifically blended to maintain maximum viscosity at
normal temperatures and to improve start up under cold
weather.
Cleaning the pump
1. When the oil is extremely dirty, replace the oil and
then operate the pump for 3 to 5 minutes.
2.
Drain the oil and add new oil.
If the drained oil is still dirty, repeat this cleaning
process two or three times.
Troubleshooting
Condition
Possible Cause
Solution
The pump will not start.
1. The battery is not set properly.
2. The ambient temperature is too low.
3. Poor wiring connection.
4. The pump is locked.
5. Motor failure.
1. Set the battery properly.
2. Warm up the pump in doors.
3. Repair.
4. Repair.
5. Repair.
The pump will not enough vacuum.
1. Leaking from the system.
2. Insufficient oil.
3. Dirty oil.
4. Pump parts are worn out.
5. Damaged fittings, gaskets and seal.
6. Motor failure.
1. Repair the system.
2. Refill or change oil.
3. Clean reservoir and change oil.
4. Repair.
5. Repair.
6. Repair.
Oil leakage.
1. Damaged gaskets and shaft seals.
2. Damaged O-ring of oil drain plug.
3. Oil drain plug is loose.
1. Repair.
2. Replace O-ring.
3. Tighten Oil drain plug.
Abnormal noise.
1. Motor failure.
2. Bearing failure.
3. Loose bolts.
4. Pump failure.
5. Air is sucked.
1. Repair.
2. Repair.
3. Tighten bolts.
4. Repair.
5. Tighten caps and connections.
Replace gaskets and O-rings.
Replace fittings or re-seal them.
Remark: If these procedures do not solve the problem, contact with your nearest Makita authorized distributor or send
your pump to our service center.
