21 OPM-171/B
3. Carefully remove dust from the filter housing.
4. Remove the old filter (Ref. 3).
5. Insert the new filter in the filter housing.
6. Securely screw the filter cover back on using the wing
nut.
7. Switch on the compressor.
8. Conduct a test run and operating test.
CHECKING THE COMPRESSOR
PRESSURE SAFETY VALVE
1. Turn on system and allow it to build pressure.
2. Pull the ring on the pressure valve upward.
3. Air will begin leaking.
4. Release ring.
5. Verify that the valve reseals.
6. Repeat for all pressure safety valves in system both on the
generator and in other locations.
ADJUSTING THE COMPRESSOR BELT
Note: When adjusting or replacing the belt on the unit,
care must be taken to ensure that the pulleys are properly
aligned and that the belt is properly tensioned. Failure to do
this may result in premature wear and failure of the drive
belts, damage to the equipment, or poor performance.
There are several things to keep in mind when adjusting
the compressor.
There are four bolts that bolt into the base of the
compressor that can be loosened to adjust the compressor
front to rear and help with minor tweaks to the angle.
Adjust these bolts first in order to do any major front to rear
adjustment. Torque those bolts to 32 FT-LBS. There are four
corner bolts that secure the sliding base into place; these
must be loosened before the tension can be set on the
belt. Once the four bolts are loosened, the two bolts on the
right side of the compressor base can be turned clockwise
in order to tighten the belt or counter clockwise in order to
allow the belt to be loosened. Tighten the belt until there
is 2-3lbs of tension in the belt that can be checked with
a gauge or about .3 inches of deflection at the midpoint
of the belt. It is recommended to use a proper pulley
alignment too when making any adjustments to the pulley
in order to keep the alignment accurate so as to prevent
excess wear on the belts. Once the belt tension has been
set, tighten the four corner screws to lock the tension and
alignment into place. Verify after tightening all four corner
bolts that the pulley alignment has not shifted.
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