Product Manual

6: Maintenance ShopTek™ ST45, ST55, ST75 (U.S.A. & Mexico) Operation & Maintenance Manual
88292021-240 R01
36 Subject to EAR, ECCN EAR99 and related export control restrictions.
Clean the lubrication system before changing fluid. If the
ambient temperature is outside of the allowed range for
the fluid, please contact your Sullair representative.
1. Shut down the compressor, bleed pressure
to zero, and allow the compressor to cool.
2. Slowly remove the plug from the ball valve at
the bottom of the fluid/air separator tank.
3. Securely attach a drain hose to the valve.
• It may be convenient to run the waste fluid
directly into a waste fluid drum.
4. Slowly open the ball valve. Leave the valve
open until the fluid stops draining.
5. Close the valve and remove the drain hose.
6. Replace the plug.
7. Remove the fluid filler cap.
8. Pour fluid into the fluid filler.
9. Replace the fluid filler cap by turning the cap
to the right by hand until it will not turn any
further. Ensure the O-ring is properly seated.
10. Run the compressor for a short period of
time and check the fluid level through the
sight glass, adding more fluid if necessary
(see Section 6.3.7: Compressor fluid levels).
6.4.3 Fluid filter maintenance
Replace the fluid filter element every 1000 hours of ser-
vice. The fluid filter service indicator will display a warn-
ing when the fluid filter element has exceeded its useful
service life.
6.4.3.1 Replacing the fluid filter element
1. Shut down the compressor and bleed pres-
sure to zero.
2. Remove the old element and washer using a
filter wrench.
3. Clean the washer seating surface.
4. Apply a light film of silicone grease to the
new washer.
5. Hand tighten the new element until the
washer is seated.
6. Continue to tighten the element by hand an
additional ½ to ¾ turn.
7. Restart the compressor and check for leaks.
6.4.4 Air filter maintenance
Inspect the air filter element every 1000 hours of service.
Replace the air filter element every 2000 hours of service
or if the service indicator of the air filter is in the red zone
when running the compressor at full load.
• Internal element part number: 88290002-338
• External element part number: 88290002-337
WARRANTY INFORMATION
Mixing of fluids other than Sullube
®
will void the
compressor’s warranty.
CAUTION
Assume the fluid is hot and under pressure.
Figure 6-3: Fluid filter
1. Top cover
2. Washer
3. Fluid filter element
1
1
Element part number: 250025-526