Change Of Air Intake Filter - Gardner Denver L Series Original User And Service Manual

The changing intervals can be found in the
maintenance schedule 10.3.
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.
Fig. 19
Replace the fine oil separator as follows:

Switch off the compressor and ensure that it is
depressurized. For this purpose open the ball valve
(- 1 - Fig. 19) at the after-cooler until the system has
been vented. Finally, close the valve again.

Detach the plastic oil extraction pipe (- 2 - Fig. 18).


Detach the plastic control air line (- 3 - Fig. 18).

Fully remove oil extraction with pressed in extraction
tube (- 4 - Fig. 18).

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 (- 7 - Fig. 18) on the
circumference of the pressure reservoir's cover.

The cheese head screw for lifting the reservoir
cover (- 8 - Fig. 18) 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 (- 1 - Fig. 18).

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 (- 8 - Fig. 18)
counter-clockwise until the reservoir cover is lying
loosely on the pressure reservoir flange

Screw in and tighten crosswise all hex. 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
158 lbf ft (screw strength class 8.8) or 70 lbf ft
(screw strength class 5.6).

Tighten the cheese-head screw used to raise the
reservoir cover (- 8 - Fig. 18) for rotary protection
(clockwise).

Properly reinstall all lines to the pressure reservoir
and the oil extractor which have been removed.
Changing times for the fine oil separator
Operating conditions (e.g., coolant temperatures), the
type of operation and the quality of the intake air (e.g.,
dust content, ratio of gaseous foreign substances such
as SO and solvent vapors) have a strong influence on
2
the filter lifespan (air filter, oil filter, fine separator).
In these cases the intervals between changes may be
shorter

10.7 Change of air intake filter

DANGER
Only perform checks and carry out work on
the screw compressor when the unit is out
of operation, depressurized, and secured
from being switched on again!
NOTICE
Never operate the screw compressor system
without an air filter (even briefly removing it can
cause considerable damage to the machine)!
13-25-639 v00 Page 48