Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 999019 / 22/12/2009
page 16 of 29
Before starting maintenance, isolate the pump from the vacuum system and the elec-
trical supply so that the pump cannot be operated accidentally.
Has the pump been exposed to dangerous or corrosive gases?
Take appropriate safety measures (e. g. safety-clothing and protective goggles) to avoid
inhalation and skin contact.
The pump and the oil may be contaminated with pumped chemicals which have been
pumped, adopt suitable decontamination measures if necessary.
Aging of the oil necessitates oil change in case of darker colour (see new oil), strange
odour of the oil or foreign particles.
Depending on individual cases (especially if corrosive gases or vapours have been
pumped) it may be efficient to check the oil at appropriate intervals.
Under
normal operating conditions
:
☞
Check oil level every time before starting the pump.
☞
Change oil on a yearly basis at the latest.
☞
Dispose of the used oil, which may be contaminated by chemicals, according to all
applicable regulations.
Oil change:
☞
Heat pump to operating temperature before changing oil.
☞
Isolate the pump from the electrical supply and admit air.
☞
Choose suitable pad, oil may drop.
☞
Remove oil filler plug and oil drain plug.
☞
Tilt pump and catch oil in a suitable container.
☞
Dispose of the used oil according to the regulations.
☞
Reassemble oil drain plug with O-ring.
☞
To flush the pump, pour in fresh oil (approx. 50 ml) through the pump inlet.
☞
Operate the pump briefly, drain flushing oil and repeat flushing procedure if neces-
sary.
☞
Fill in fresh oil through the oil inlet port until oil level reaches mark Max. in the sight
glass.
Note:
The oil flows from the gearing side of the roots pump through a connecting
bore in the housing to the motor side.
☞
Check oil level after some minutes, pour in oil if necessary.
☞
Do not use too much oil - oil may enter the pump chamber.
☞
Close oil filler plug.
Oil change
oil drain
plug
oil filler plug
☞
Recommended oil (B-oil, 1l) .....................................................................
68 70 10
