3
1
2
3
Fig. 25:
Disassemble the oil/air heat exchanger
1 Screw (2x)
3
Oil/air heat exchanger
2 Compressed air
Disassemble the oil/air heat exchanger
1. Remove the 2 screws.
2. Remove the oil/air heat exchanger from the vacuum pump.
– Be careful with the O-rings.
3. Collect the operating fluid that escapes from the oil/air heat exchanger and the vacuum pump.
Cleaning the oil/air heat exchanger and checking for damage
Make sure that no contamination enters the oil/air heat exchanger.
1. Clean the oil/air heat exchanger using compressed air.
2. Check the oil/air heat exchanger for damage.
Assembling the oil/air heat exchanger
1. Insert the oil/air heat exchanger.
– Be careful with the O-rings.
2. Screw in the 2 screws.
– Tightening torque:
20 Nm
7.8 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 –
D2
– only.
It is not possible to change from
P3/D2
to
F4/F5
or vice versa.
Prerequisite
● Maintenance level 1 carried out
Required consumable material
● 3-fold 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. Change the exhaust filters in the operating fluid separator.
3. Change the operating fluid filter.
4. Fill the vacuum pump with operating fluid to one third full.
5. 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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