Keeping continuous operation under
high suction pressure
Pump surface temperature reaches 1 00℃on
continuous operation under high suction
pressure, no problem
Oil is under the MIN line of the oil
Add the specified amount of oil
Oil does not circulate, or the oil hole of
the cover is clogged
Overhaul and clean the oil hole
Abnormal
sound is
generated
Oil is not filled. Oil is under the MIN
line of the oil level
Overhaul (repacemer1tofthe cylinder, rotor
and cover)
a) The oil hole of the cover is clogged
b) Oil distributor valve has a trouble
b) Check and repair the oil distributor valve
Check the cooling fan mounting
Rattling sounds on starting or slopping
the pump
It’s a phenomenon caused by vanes that
temporarily make irregular motions, not a
particular problem
Motor rotation direction is reverse
Do the connection again to correct rotation
direction.
Coupling spider is damaged
Replace the coupling spider
Foreign matter has entered the pump
Disassemble and clean the pump to
eliminate foreign matter
Parts inside the pump are damaged
Overhaul(replace the damaged parts)
Lot of oil
splashed out
of the outlet
port
Pump oil excesses the specified
amount
Drain the oil until it gets the specified
amount
Continuous operation is performed at
a high evacuation pressure
install an oil mist trap at the outlet side
Clean or replace the oil mist trap
Exhaust valve plate is damaged
Replace the exhaust valve plate
The oil leak
s outside the
pump
Deterioration of the 0-ring and oil seal
of the case and cover
Check and replace the 0-ring and oil seal
Continuous operation is performed
Please select the heat-resisting
at a high evacuation pressure
The drain port is loose, the gasket is
damaged.
Tighten the drain port, replace the gasket
Note: Please refer to the related content in this manual to operate.