Sullair 300HH - Bearing Lubrication

36
375 Caterpillar Standard and Aftercooled/Filtered Operator’s Manual and Parts List
SECTION 5
The following steps apply to “H” and “HH” compressors
equipped with dual pressure controls.
Start the compressor and allow the engine to warm up 1.
to its normal operating temperature with the service
valve closed and the pressure selector valve set to the
LOW position.
Follow the procedure for setting the controls to 100 2.
psig (6.9 bar) rated full load pressure as describe in
preceding steps 2 through 6.
Turn the pressure selector valve to the HIGH position 3.
with the service valve closed.
Adjust the high pressure regulator so that the 4.
compressor maintains a receiver tank pressure of 165
psig (11.4 bar) on “H” models or 220 psig (15.2 bar) on
“HH” models.
Gradually open the service valve to atmosphere until 5.
the engine speed increases and the receiver tank
pressure stabilizes at 150 psig (10.3 bar) on “H”
models or 200 psig on “HH” models. At this point the
engine should be operating at its rated speed. If
necessary, to raise or lower speed, lengthen or
shorten the rod respectively.
Bearing Lubrication
Refer to Figure 5-6. Proper lubrication of the portable
compressor’s bearing axle is critical to its proper function
and reduction of wear on this part. Wheel bearings should
be lubricated at least every 12 months, or more, to ensure
proper performance and minimize wear. Use a wheel
bearing grease that conforms to MILSPEC MIL-G-10924
or a high temperature one such as lithium complex NLGI
consistency #2.
Axles with the E-Z Lube feature can be periodically
lubricated without removing the hubs from the axle. This
feature consists of axle spindles that have been tted with
a grease zerk in their ends. When grease is pumped into
the zerk, it is channeled to the inner bearing and then
ows back to the outer bearing, and then back out of the
grease cap hold (see Figure 5-6).
Remove the rubber cap from the grease cap’s end.1.
Using a full charged grease gun, place the gun onto 2.
the grease zerk located on the end of the spindle.
Make sure the nozzle is fully engaged on the tting.
Pump grease into the zerk. The old grease will be 3.
displaced and ow out of the cap around the grease
gun nozzle.
When the new grease starts owing out of the cap, 4.
disengage the gun and wipe off any excess off the
cap; and replace the rubber plug.
SU_0000671
1
2
4
5
6
7
3
Rubber Plug1.
Outer Bearing2.
Grease Flow3.
Grease Fitting4.
Metal End Cap5.
Inner Bearing6.
Spring Loaded Double Lip Seal7.
Figure 5-6: Typical E-Z Lube Axle