8
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Maintenance
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8.2
Check
oil
level
Proceed
as
follows:
Switch
off
the
vacuum
system.
Wait
1
minute
after
switching
off
the
vacuum
pumps,
before
checking
the
oil
level.
Top
up
with
oil
if
necessary.
8.3
Oil
and
oil
filter
change
ATTENTION!
Operation
of
the
vacuum
pump
without
oil
will
cause
severe
damage
to
it
quickly.
•
Only
use
oils
approved
by
Busch.
For
information
to
the
oil
type
and
oil
volume,
see
the
technical
data
(chap.
15)
and
oil
(chap.
16).
Follow
the
figures
Fig.
11:
Drain
oil
1
x
sealing
ring,
part
no.:
0486
000
505
Drain
pan
