Karcher HD 7-250 De Tr1 - Manual (Page 80)

Wartung.pm6.5 - GB
Page 4.10
Maintenance
BOGE Operating instructions for CM 9 series screw compressor module
4.3 Regular maintenance work
– Switch off the compressor using the OFF button.
CAUTION: Risk of injury!
Switch off the main switch and secure against unintentional switching-on.
Draining old oil
– Switch off compressor. After approx 2 sec screw cap nut on the bleed
aperture of the magnetic valve.
CAUTION: Risk of injury!
Danger of burning due to hot oil!
– Remove blind plug at oil drain with the tap closed.
– Fit oil drainage hose (the hose is located on the machine).
– Place the oil drain hose into a suitable container.
– Slowly open the stop valve.
The pressure cushion forces the oil into the container.
– Once the compressed air/oil receiver has been completely drained,
close the stop valve.
– Remove oil drainage hose and replace blind plug together with a new
copper sealing ring.
– Remove the cap nut from the solenoid valve.
– Change oil filter (procedure as described above).
– Change oil separators (procedure as described above).
Filling with new oil:
– Fill up to the edge of the thread of the filling socket (max.) (procedure as
described above).
ATTENTION!
After each oil change you have to fill a small quantity of oil into the suction
controller before starting the compressor.
For oil quantity and procedure see chapter 3.5 "Commissioning following ex-
tended stoppages".
ATTENTION!
Always fill with the same oil type as previously used. Never mix different oil
types and brands.
The oil circuit must be flushed prior to changing the oil type.
– Conduct trial run.
CAUTION: Risk of injury!
Secure against unintentional restarting.
– Check the oil filters and oil separators for leaks and tighten by hand,
if necessary (procedure as described above).
– Check oil level (procedure as described above).
Top up oil losses, if any.