24
Maintenance
Dismantling
Fig. 14: Dismantle silencer
Drain off operating fluid.
Unscrew screws 293 and remove cover 14, use tapped holes if necessary; observe
O-ring 264.
Unscrew screws 292 from flange 77 and lift flange with oil filter 59 out of the pump;
pay attention to dripping operating fluid.
Unscrew screws 332 and remove baffle plate 16.
Lift casing 12 with a chain hoist at eye bolt R or a jack lift.
Caution!
Casing weighs
approx. 46 kg.
Unscrew nuts 334 and remove washers 346.
Carefully back casing 12 away from support stand 11 in axial direction; pay attention
to O-ring 269.
Dismantle valve housing 71 in axial direction, clean and check radial borehole for free
flow.
Unscrew valve spindle 72.
Examine O-rings 242, valve spindle 72 and valve seat for wear and replace if neces-
sary.
Reassemble in the reverse sequence. Carefully push O-ring 242 into the nut in valve
spindle 72 and oil lightly with operating fluid.
Setting the silencer
The silencer is set using a standard screwdriver when the pump is running at operating
temperature and vacuum flange and gas ballast valve are closed:
Bring pump up to operating temperature.
Unscrew operating fluid filler screw 327.
Turn valve spindle 72 approx. 3 rotations using screwdriver (flush), wait a few seconds
and then reclose far as it will go (clockwise).
11
Support stand
12
Casing
14
Cover
16
Baffle plate
59
Oil filter
71
Valve housing
72
Valve spindle
77
Flange
242 O-ring
264 O-ring
292 Screws
293 Screws
327 Operating fluid filler screw
332 Screws
334 Hexagon nut
346 Washer
242
71
242
72
327
293
14
264
292
59
12
16
11
77
R
332
334/
346
