GA 02.200/8.02 - 10/02
Maintenance
15
3.3 Oil Change
3.3.1 Pumping Chamber
Always carry out the oil change when the pump is shut
down but still warm.
If there is a risk of the oil being polymerised owing to the
connected process, the oil should be changed immedia-
tely after operation of the pump.
Shut down the pump and wait for a while; the pump is
automatically vented within 2-5 minutes.
Unscrew the oil-drain plug (7/1) and let the used oil drain
into a suitable vessel.
When the flow of oil slows down, reinstall the oil-drain
plug, briefly start the pump (max. 10 s) and then switch
it off. Unscrew the oil drain plugs and drain the remaining
oil.
Single-stage pumps (E series) only: Unscrew the oil-
drain plug below the oil-level glass and drain the oil.
Reinstall the plug with gasket.
Reinstall the oil-drain plug(s) (check the O-ring and gas-
ket ring and replace them if necessary). Remove the
plug (7/6) from the oil-fill port.
In the event of considerable contamination, the pump
can be flushed as follows.
Use only pump oil for flushing the pump; do
not use solvent for this purpose.
Fill the pump with at least half of the quantity of oil nee-
ded for operation (see Section 1.3) and let the pump run
for approx. 5 min. with the inlet port closed. Then drain
the oil. If necessary, repeat this flushing procedure.
Then fill in the oil quantity required for operation (see
Section 1.3) and reinstall the oil-fill plug with gasket.
3.3.2 Gear
Shut down the pump.
Unscrew the oil-drain plug (7/16) and let the used oil
drain into a suitable vessel. Reinstall the oil-drain plug
(7/16) with gasket.
Unscrew the oil-fill plug (7/14), fill in approx. 0.1 ltr oil,
reinstall the oil-fill plug and start the pump briefly.
Switch off the pump, drain the oil used for flushing and
firmly reinstall the oil-drain plug (7/16) with gasket.
Unscrew the oil-fill plug (7/14) and fill in the required
quantity of oil (see Section 1.3 – Technical Data).
Reinstall the oil-fill plug with gasket.
Use only the original oil-fill plug or the pro-
per spare.This plug contains a venting devi-
ce for avoiding excessive pressure in the
gear housing.
3.4 Cleaning the Dirt Trap
In the pump's inlet port there is a wire-mesh filter acting
as a dirt trap for contaminants (7/13). It should be kept
clean at all times in order to avoid a reduction of the
pumping capacity.
For this purpose, disconnect the intake line, remove the
dirt trap from the inlet port and rinse it in a vessel using
a suitable solvent. Then thoroughly dry it with compres-
sed air.
If the dirt trap is faulty, replace it.
The cleaning intervals depend on requirements. If large
amounts of abrasive materials occur, a dust filter should
be inserted in the intake line (see Section 1.3).
3.5 Cleaning the Pump
In the case of special operating conditions (intake of par-
ticles, high vapour loads, uptake of liquids or similar) we
recommend preventive maintenance on the components
and the exchange of wearing parts. The intervals for this
depend very much on the type of process.
Caution
Caution
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