Maintenance
3.2 Oil Change
For proper operation of the pump, it is essential that the
pump has an adequate supply of the correct and clean
oil at all times.
The oil must be changed when it looks dirty or if it
appears chemically or mechanically worn out (see
Section 3.1.1).
The oil should be changed after the first 100 operating
hours and then at least every 2,000 to 3,000 operating
hours or after one year. At high intake pressures and
intake temperatures and/or when pumping contaminated
gases, the oil will have to be changed more frequently.
Further oil changes should be made before and after
long-term storage of the pump.
If the oil becomes contaminated too quickly, install a dust
filter and/or oil filter (see Section 1.3).
Contact us for more information in this matter.
Required tool:
Allen key size 8.
Only change the oil after the pump has
been switched off and while the pump is still
warm.
If there is the danger that the operating
agent may present a hazard in any way due
to decomposition of the oil, or because of
the media which have been pumped, you
must determine the kind of hazard and
ensure that all necessary safety
precautions are taken.
Remove the oil-drain plug (9/4) and let the used oil drain
into a suitable container. When the flow of oil slows
down, screw the oil-drain plug back in, briefly switch on
the pump (max. 10 s) and then switch it off again.
Remove the oil-drain plug once more and drain out the
remaining oil.
Screw the oil-drain plug back in (check the gasket and
reinstall a new one if necessary).
Remove the oil-fill plug (9/1) and fill in with fresh oil.
Screw the oil-fill plug (9/1) back in.
We can only guarantee that the pump
operates as specified by the technical data
if the lubricants recommended by us are
used.
3.3 Cleaning the Dirt Trap
A wire-mesh sieve is located in the intake port of the
pump to act as a dirt trap for coarse particles. It should
be kept clean to avoid a reduction of the pumping speed.
For this purpose, remove the dirt trap (2/2) from the
intake port and rinse it in a suitable vessel with solvent.
Then thoroughly dry it with compressed air.
If the dirt trap is defective, replace it with a new one.
The cleaning intervals depend on the
application. If the pump is exposed to large
amounts of abrasive materials, a dust filter
should be fitted into the intake line.
16
Fig. 9 Oil change
Key to Fig. 9
1 Oil-fill plug
2 Oil-level mark “maximum”
3 Oil-level mark “minimum”
4 Oil-drain plug
Caution
Caution
1
2
3
4
Caution
Warning
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