375, 375H, 400HH, 425, 425H T4F User Manual 5: Maintenance
02250223-036 R01
Subject to EAR, ECCN EAR99 and related export control restrictions. 53
3. Remove the eight (8) cover bolts and wash-
ers and lift the cover off the sump.
4. Remove the separator element.
5. Scrape the old gasket material from the
cover and the flange on the sump. Do not
allow the scrapings to fall into the tank.
6. Install the new element.
7. Replace the sump cover and bolts. Lightly
tighten all the bolts and then gradually
tighten them alternating between bolts which
are diagonally opposite each other. Torque
the bolts to 160 lbf ft (215 N m).
8. Reconnect all piping. The fluid return line
tube should extend to the bottom of the sep-
arator element which will ensure proper
return line flow.
9. Clean the fluid return line strainer and clear
the orifice before starting the compressor.
10. After 24 hours of operation, tighten the sump
cover bolts to the value given in step 7.
5.9.5 Setting speed and pressure controls
on portable compressors equipped
with poppet valves
Refer to Figure 5-4 and Figure 5-5. Before adjusting the
compressor’s control system, the rated full-load pressure
and the high
/low rpm settings must be determined. This
information is provided in Section 3 or can be obtained by
contacting a Sullair representative.
Figure 5-3: Air/fluid separator
1. Receiver tank
2. Separator element (with gaskets)
3. Cover
Figure 5-4: Control system adjustment—
standard pressure
1. Compressor air end
2. Warm-up control valve
3. Receiver tank
4. Pressure regulator/blowdown manifold
5. Oil return line
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