6: Maintenance ShopTek™ ST4, ST5, ST7, ST11, ST15 Three-phase 60 Hz User Manual
88292018-236 R00
42 Subject to EAR, ECCN EAR99 and related export control restrictions.
6.3.3 Every 4000 hours of operation or one
year (whichever occurs first)
• Replace the separator element. Refer to Section 6.7.
6.3.4 Every one year
• Change the fluid. Refer to Section 6.4.
6.3.5 Every two years
• Replace the hoses. Refer to Section 6.10.
6.4 Fluid maintenance
Drain the separator tube and change the compressor
fluid using instructions shown in Section 3.2: Lubrication
guide on
page 22.
6.5 Fluid filter maintenance
Refer to Figure 6-3. Replace the fluid filter under any of
the following conditions, or whichever occurs
first:
• Every 2000 hours a display on the controller
ind
icates the need for replacement
• Every fluid change.
6.5.1 Fluid filter replacement
Refer to Figure 6-3.
1. Use a strap wrench to remove the fluid filter
and gasket.
2. Dispose of the old filter according to applica-
ble federal, state and local regulations.
3. Clean gasket seating surface.
4. Apply a light film of fluid to the filter gasket of
a new fluid filter.
5. Hand tighten the filter until the gasket is seated.
6. Continue tightening filter an additional ½ to
¾ turn.
7. Replace any lost fluid. Do not overfill.
8. Restart compressor and check for leaks.
Figure 6-2: Return line strainer—ST11, ST15
1. Strainer
2. Separator tube
NOTE
Dispose of fluids in accordance with applicable
federal, state and local regulations.
Figure 6-3: Fluid filter assembly
1. Fluid filter
2. Fluid sample valve
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