6.5 Refilling operating fluid
Prerequisite
● Vacuum pump switched off
Required tool
● Ring spanner,
WAF 32
Required consumable material
● Operating fluid
Required aids
● Funnel (optional)
MAX
MIN
2
1
3
Fig. 15:
Refilling operating fluid
1 Filler screw
3
Sight glass
2 O-ring
Procedure
1. Unscrew the filler screw.
2. With the vacuum pump at operating temperature, refill with operating fluid up to the top marking
before the minimum fill level is reached.
3. Screw in the filler screw again.
– Be careful with the O-ring.
6.6 Switching off the vacuum pump
NOTICE
Contamination from operating fluid backflow
After the vacuum pump is switched off, there is a risk that the connected vacuum system can become
contaminated by backflow. The safety valve on the vacuum pump is not suitable for longer-term seal-
ing.
► Install an additional shut-off valve in the intake line.
► Shut off the intake line immediately after switching off the vacuum pump.
Operation
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