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GA02329_002_03 - 01/2010 - © Oerlikon Leybold Vacuum
Maintenance
To flush the pump, for clean oil up to the minimum level, let the pump run for
a few minutes and drain the oil. Install a full charge of oil, 1 liter.
C. Replacing the exhaust filters
Oil mist escaping from the exhaust during operation indicates that the filter
is probably clogged. Increased energy intake by the motor could also be
the result of a soiled exhaust filter. Open the exhaust hood, take out the filter
and replace it. Also check the gasket of the exhaut flange and change it if
necessary.
D. Gas ballast valve cleaning
To clean the gas ballast valve, disassemble the fan cover and the fan.
Unscrew the lateral pressure screw, remove the plug and the gas ballast
valve by using an appropriate M10 screw screwed in the valve by pulling on
the screw.
Clean the membrane, the seat and the RILSAN tube.
Reassemble in the reverse sequence.
E. Inlet flange sifter cleaning
To clean the inlet flange sifter, disconnect the inlet flange and clean the sifter
with blast air or an appropriate solvent.
F. Anti-suck back valve checking
The anti-suck back valve should be checked at the same time as the inlet
flange sifter and if dirty, be cleaned with an appropriate solvent.
Also check, if there is no damage on the sealing part of the valve.
G. Fan cover cleaning
Soiling of the fan cover may lead to overheating of the motor and the pump.
Put off the cover and clean it with blast air.
Before starting the pump again, be sure that the cover has been
reassembled.
H. Checking the float valve
When replacing the exhaust filter, check the cleanliness and the proper
operation of the float valve. After having disassembled the exhaust flange
and oil casing, remove screw (pos. 57d), pull on the float valve (pos. 57),
clean the nozzle and check that the float itself oscillates free around its
axle and that the valve is tight. Clean the float chamber of the oil casing.
Reassemble in the reverse sequence.
