Gardner Denver L Series Original User And Service Manual page 58

Changing the oil fine separator
The changing intervals can be found in the maintenance schedule.
If the fine oil separator is monitored (optional), then a differential pressure that is too high will be shown in
the control panel of the compressor controller. When the corresponding warning lights up, it is time to
change the fine oil separator.
Replace the fine oil separator as follows (See Figure 8-8):

Switch off the compressor and ensure that it is depressurized.

Detach the plastic oil extraction pipe.

Detach the plastic control air line.

Fully remove oil extraction with pressed in extraction tube.

Loosen all hexagonal head screws from the pressure control valve.

Loosen the two screws in the swivel direction of the pressure control valve and remove, then the
valve can be swiveled inwards.

Remove all hexagon screws on the circumference of the pressure reservoir's cover.

The cheese head screw for lifting the reservoir cover must be screwed in clockwise until the cover is
lifted off by some mm.

Pivot the reservoir cover 180°.

Remove the used fine oil separator.

Clean all seals and if necessary remove and clean the O-ring.

Install a new fine oil separator.

Pivot the reservoir cover back to the starting position.

Screw the cheese-head screw counter-clockwise until the reservoir cover is lying loosely on the
pressure reservoir flange

Screw in and tighten crosswise all hexagonal screws except for the two screws in the pivot area of
the PMV.

Pivot the PMV back to its starting position and install it with the corresponding screws.

Then fit the missing hexagonal head screws in the reservoir cover and tighten to a tightening torque
of 214Nm / 158 lbs ft. (screw strength class 8.8) or 95Nm / 70 lbs ft. (screw strength class 5.6).

Tighten the cheese-head screw used to raise the reservoir cover for rotary protection (clockwise).

Properly reinstall all lines to the pressure reservoir and the oil extractor which have been removed.
13-25-640 v00 Page 58