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Maintenance and repair
Fig. 11 Gas ballast valve
h
1
Cover
f
3
Filter disc
g
1
Countersunk screw
f
4
Mesh filter discs
f
4
f
4
h
1
f
3
g
1
Inlet air filter:
Depending on the pollution of the inlet medium, the mesh filter (Fig. 10/f
1
) has to be cleaned more or less
often by washing or it must be replaced.
a) Take off the vacuum connection (Fig. 10/A) after removing the screws (Fig. 10/s
1
).
b) Clean the mesh filter (Fig. 10/f
1
).
Also check the valve seat for contamination.
Re-assemble in reverse order.
Gas ballast valve filter:
The pumps work with a gas ballast valve (Fig. 10/U).
Depending on the pollution of the running through medium, clean the installed filter disc (Fig. 11/f
3
) and
4
) more or less often by blowing off.
a) Release the countersunk screw (Fig. 11/g
1
) and remove the plastic hood (Fig. 11/h
1
).
b) Take out the filter parts for cleaning.
Re-assemble in reverse order.
