23
Maintenance
7.4
Cleaning and setting the silencer
The silencer is a nozzle set inside the gas ballast flange which silences the knocking
sound of the oil. When dirty it should be cleaned or replaced.
Cleaning the silencer
Î
Unscrew silencer screw 74.3; be careful with O-ring 74.12.
Î
Clean the boring.
Î
Re-fit silencer 74.3 with O-ring 74.12.
Adjusting the silencer
Î
First screw silencer screw 74.3 tight.
Î
Turn gas ballast knob 74.5 clockwise, in position "0".
– C version: Close spindle 9 by turning to the right.
Î
A knocking sound soon will be audible when the pump is running.
Î
Slowly loosen silencer screw 74.3 until the knocking sounddisappears.
Adjusting the gas ballast level
C version
The gas ballast level can be adjusted by turning the spindle 74.8:
Î
Turning to the left: Open.
Î
Turning to the right: Closed.
7.5
Checking the oil level in the oiler (only for C version pumps)
Pumps in the corrosive gas version come equipped with an additional oiler. In
these versions the cavity between the radial shaft seal rings on the rotor shaft are
supplied with operating fluid by an oiler.
Î
Check oil level during continuous operation on a daily basis, otherwise each
time the pump is switched on.
Î
When filling, oiler 110 should only be filled up to the "max." mark on sightglass
114;
– use the same operating fluid as in the pump.
4
Support stand
110 Oiler
114 Sightglass
124 Hose (elastomer), 110
mm
128 Hose (elastomer), 150
mm
144 Filler screw
238 O-ring
110 114
4
124
128
238
144
