Operating Adjustments; Bearing Lubrication - Sullair 125 Operators Manual And Parts Lists

2. With the service valve closed, set the engine low
speed (idle) to its specified setting with the idle
stop screw on the engine injector pump.
Operation at speeds below the minimum idle
speeds shown in Section 3 under Specifications
will damage the compressor.
Extended operation below those speeds will
induce coupling and/or compressor failures.
3. Adjust the pressure regulator so that the com-
pressor maintains 120 psig (8.3 bar).
4. Gradually open the service valve to atmosphere
until the engine comes up in speed and sump
pressure is held at 100 psig (6.9 bar). At this
point, set the engine high speed to its specified
setting by adjusting the high idle threaded rod
located on the engine speed control (where
applicable). To raise or lower the speed, length-
en or shorten the rod respectively.
5. Open the service valve to 100 psig (6.9 bar)
(rated full load pressure) and recheck top engine
speed and control response. Close the service
valve and allow the compressor to cycle and
recheck low engine speed (idle).
The following explanation applies to "H" com-
pressors with dual pressure controls:
1. Start the compressor and allow the engine to
warm-up to normal operating temperature with
the service valve closed and the pressure selec-
Figure 5-5 Typical E-Z Lube Axle
NOTE
MAINTENANCE
tor switch set to the "low" position.
2. Follow the procedure for setting the controls at
100 psig (6.9 bar) rated full load pressure as
previously described in Steps 2 through 5.
3. Switch the pressure selector switch to the "high"
position with the service valve closed.
4. Adjust the high pressure regulator so that the
compressor maintains 165 psig (11.4 bar).
5. Gradually open the service valve to atmosphere
until the engine comes up in speed and sump
pressure is held at 150 psig (10.3 bar). At this
point the engine should be at rated speed. If
necessary, to raise or lower the speed, lengthen
or shorten the rod respectively.

OPERATING ADJUSTMENTS

The first step is to start the compressor according to
the instructions in Section 4, Subsequent Start-up.
Allow the engine to operate until it reaches the nor-
mal operating temperature. Open the service valve
until the engine speed increases to, or close to, the
maximum specified operating speed.

BEARING LUBRICATION

Refer to Figure 5-5. Proper lubrication is essential
to the proper functioning and reliability of your
portable compressor axle. Wheel bearings should
be lubricated at least once every 12 months, or
more frequently to help insure proper performance.
Use wheel bearing grease that conforms to military
specification MIL-G-10924 or a high temperature
wheel bearing grease such as lithium complex
Section 5
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