Karcher HD 7-250 De Tr1 - Manual (Page 82)

Wartung.pm6.5 - GB
Page 4.12
Maintenance
BOGE Operating instructions for CM 9 series screw compressor module
4.3 Regular maintenance work
Checking
the safety valve
Fig. 4.8: Check safety valve
1
Check: – After approx. 3000 operating hours,
however, at least once a year.
Check safety valve by opening the screw plug .
CAUTION: Risk of injury!
Danger of burning due to hot oil!
Take extreme care when checking the safety valve with the compressor
running taking all safety measures into consideration.
A hot air-oil mixture escapes when opening!
– Open the threaded plug counterclockwise.
The air-oil mixture escapes.
– Tighten the threaded plug by turning clockwise.