Maintenance
25
Slowly open valve spindle 72 (1/2 to 1 rotation) until the oil hammer noise disappears.
Screw in operating fluid filler screw 327.
7.4
Changing the gas ballast filter
The greater the contamination, the lower the filter air throughput and the greater the risk
of condensation and corrosion within the pump.
Standard version
Fig. 15: Gas ballast valve (standard version)
Turn the cover and open the filter housing 122.
Clean filter insert 123 or replace as necessary.
120 Gas ballast valve (ball valve)
122 Filter housing
123 Filter insert
120
122
123
