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1.
Unplug air compressor from
power source.
2.
Remove belt guard.
3.
Place a straightedge against the
outside of the flywheel and the
motor drive pulley.
4.
Measure the distance between
the edge of the belt and the
straightedge at points A1 and A2
in figure. The difference between
measurements should be no more
than 1/16" (1.6 mm).
BELT
MOTOR
PULLEY
1
'l
AI=A2 (MEASURED)
STRAIGHT
J
BI= B2 (VISUAL)
EDGE
J
5.
If the difference is greater or less
than 1/16" (1.6 mm) loosen the
set screw holding the motor drive
pulley to the shaft and adjust the
pulley's position on the shaft until
the A1 and A2 measurements
are within 1/16" (1.6 mm) of each
other.
6.
Torque the motor drive pulley
set screw. See Repair Parts for
torque specifications.
7.
Visually inspect the motor drive
pulley to verify that it is perpen-
dicular to the drive motor shaft.
Points B1 and B2 of Figure should
appear to be equal. If they are
not, loosen the setscrew of the
motor drive pulley and equalize B1
and B2, using care not to disturb
the belt alignment performed in
step 2.
8.
Retighten the motor drive pulley
setscrew. See Repair Parts for
torque specifications.
9.
Reinstall belt guard.
AIR COMPRESSOR
PUMP
INTAKE AND EXHAUST
VALVES
Once a year have a Trained Service
Technician check the air compressor
pump intake and exhaust valves.
21- ENG
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