29300270042_002_C2 - 07/2020 - © Leybold
Maintenance
3.3 Oil Change, Replacing the Oil Filter
Tool required: oil filter key (710 73 532)
Always change the oil when the pump is switched off but still at working tem-
perature.
If there is a risk of the oil being polymerized by the connected process,
change the oil immediately after operation of the pump.
Pump in function is hot and some surfaces could reach a temperature higher
than 80 °C (176 °F).
There is a risk of burn by touching.
Unscrew the oil-drain plug and let the used oil drain into a suitable container.
Depending on the process involved, dangerous substances may escape from
the pump and oil. Take the appropriate precautions.
Observe the safety regulations.
When disposing of used oil please observe the relevant environmental regula-
tions!
When the flow of oil slows down screw the oil-drain plug back in, briefly
switch on the pump (max. 10s) and switch if off. Remove the oil-drain plug
again and drain the remaining oil.
Unscrew the oil filter. Take a new oil filter, moisten its gasket with oil and
screw it in manually.
Reinsert the oil-drain plug (check the O-Ring and replace it with a new one if
necessary).
Unscrew the oil-fill plug and fill the pump should be flushed by filling it with
fresh oil up to the bottom edge of the oil-level glass, run it for a short time
and then change the oil again.
Use suitable oil only (see Section 1.7).
Warning
Important
3.2.2 Oil Condition
Normally the oil is clear and transparent. If gases or liquids dissolved in the
oil result in deterioration of the ultimate pressure, the oil can be degassed by
allowing the pump to run for about 30 min. with the intake port closed and
the gas ballast valve open.
The amount of oil required for an oil check should be drained via the oil-drain
plug (ET3/19) into a beaker or similar container with the pump switched off
but still at operating temperature.
Depending on the process involved, dangerous substances may escape from
the pump and oil. Take the appropriate precautions.
Observe the safety regulations.
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