12. Install the complete valve with O-ring in the vacuum pump.
13. Tighten the countersunk head screws (2x).
– Tightening torque:
1.0 Nm
.
7.6 Changing the operating fluid type
Possibilities for changing the operating fluid type
The operating fluid type can be changed between mineral operating fluid –
P3
– and syn-
thetic operating fluid –
D1
– only.
It is not possible to change from
P3/D1
to
F4/F5
or vice versa.
Required consumables
● 3 times the filling quantity of the new operating fluid
Changing the operating fluid type
1. Change the operating fluid with the new operating fluid
twice
in order to rinse the vacuum pump.
2. Clean any accessories if necessary, such as oil mist filter or oil return, and replace their filter ele-
ments.
3. Fill the vacuum pump with operating fluid to one third full.
4. Note the currently used operating fluid type at a suitable location on the vacuum pump, e.g. on the
rating plate.
Maintenance
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