Section 5
MAINTENANCE
23
Figure 5 ---3 Air/Fluid Separator
*Replacement Separator Kit P/N 02250078---031
(P/N 250002 ---077)
ing procedure w ill explain how to replace the air filter
element.
AIRFILTERELEMENTREPLACEMENT
1. Loosen and remove the wingnut from the end of
the air filter cover.
2. Remove filter cap. Loosen and remove wingnut
which holds filter element in place. Remove ele-
ment.
3. Clean the body and cover with a damp cloth in-
side and out.
4. Replace t he new filter element.
5. Replace t he element retaining wingnut.
6. Reposition the cover and replace the wingnut.
7. Reset the air filter restriction indicator if so
equipped, and the unit will be ready for opera-
tion.
ELEMENT INSPECTION
1. Place a bright light inside the element to inspect
for damage or leak holes. Concentrated light will
shine through the element and disclose any
holes.
2. Inspect all gaskets and gasket contact surfaces
of the housing. Should faulty gaskets be evident,
correct the condition immediately.
3. If the clean element is to be stored for later use, it
must be stored in a clean container.
4. After the element has been installed, inspect and
tighten all air inlet connections prior to resuming
operation.
SEPARATOR ELEMENT REPLACEMENT
Refer to Figure 5---3. When fluid carry over is evident
after the fluid return line strainer and orifice as well
as the blow down valve diaphragm have been in-
spected and found to be in satisfactory condition,
separator element replacement is necessary. Use
element no. 02250078---029 and follow the proce-
dure explained below.
1. Remove all piping connected to the sump cover
to allow removal (return line, service line, etc.).
2. Remove the fluid return line from the fitting in the
cover.
3. Remove the eight (8) cover bolts and lock-
washers and lift the cover from the sump.
4. Remove the separator element.
5. Scrape the old gasket material from the cover and
the flange on the sump. Be sure to keep all
scrapings from falling inside tank.
6. Install the new element.
7. Replace the sump cover and bolts. Run the cover
boltsinfingertight,thengraduallytightenina
crisscross pattern in 4 to 5 steps. Always tighten
the bolts alternately at opposite sides of the
cover. Never tighten bolts adjacent to each other.
Torque bolts to 100 to 120 ft.---lbs. (136 to
163Nm).
8. Reconnect all piping. The fluid return line tube
should extend to the bottom of the separator ele-
ment. This w ill assure the proper fluid return flow.
9. Clean t he fluid return line strainer and clear the
orifice prior to restarting the compressor.
10. After 24 hours of operation, tighten sump cover
bolt to torque specification listed in step number
7.
PROCEDURE FOR SETTING SPEED AND
PRESSURE CONTROLS ON PORTABLE COM-
PRESSORS WITH POPPET VALVE
Refer to Figure 5---4. Prior to adjusting the Control
System, it is necessary to determine the rated full
load pressure and the high/low RPM settings for
your particular compressor. This information can be
obtained from the Operator’s Manual (Specifica-
tions Section) or by contacting your local authorized
Sullair Representative. The following explanation
applies to a compressor with 100 psig (6.9 bar)
rated full load pressure.
1. Start the compressor and allow the engine to
warm---up to normal operating temperature with
the service valve closed.
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