KAESER SK 19, Service Manual, Page: 50 / 85

Maintenance
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The pressure gauge on the oil separator tank must indicate zero psig.
Oil mist can escape when the oil separator tank is vented.
Insert the nozzle (6) in the hose coupling (3) on the oil separator tank. The residual
pressure in the oil separator tank escapes.
Remove the nozzle (6) from the hose coupling (3).
Venting the air aftercooler:
When the compressor package is vented, pressure is still present in
the air aftercooler and the pipework up to the minimum pressure check
valve. For this reason the compressor package must be isolated from
the compressed air system by closing the shut-- off valve between the
compressor package and the compressed air system. If isolation
shut-- off valve is not available, vent the compressed air system com-
pletely.
Carefully remove the screw fitting (4, see chapter 9.13). The air aftercooler vents.
Tighten the screw fitting again.
Close all maintenance doors and panels correctly before starting the
compressor package.
9.11 Oil Filter Change
Hot oil; beware of scalding.
Replace the run-- in oil filter cartridge with a standard oil filter cartridge
(supplied with the compressor) after approximately 200 operating
hours.
Change the oil fillter cartridge according to the regular maintenance schedule (see
chapter 9.2) or when the corresponding service message is displayed on SIGMA CON-
TROL (see chapter 8.1).
It is recommended that the oil filter cartridge is replaced always when the oil is changed.
9.11.1 Removal and replacement of the oil filter cartridge
Stop the compressor package under full load (see chapter 8.3).
Lock the main disconnect in the ”off” position in accordance with ap-
plicable lock out/tag out procedures (example: OSHA CFR 29
§ 1910.147) to ensure the compressor does not restart.
Before opening or removing pressurized components (pipes, hoses,
tanks, etc.) it is imperative that the compressor package is completely
depressurized.
Venting the compressor package (see chapter 9.10).
Attention!