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21 - ENG
5. Replace belt. NOTE: The belt must be centered over the grooves on the
flywheel and motor pulley.
6. Turn the wing nut on the hold down plate until it makes contact with the
washer, plus one additional turn.
7. Replace the belt guard
.
MOTOR PULLEY/FLYWHEEL ALIGNMENT
NOTE: Once the motor pulley has been moved from its factory set location, the
grooves of the flywheel and pulley must be aligned to within 1/16" (1.6 mm) to
prevent excessive belt wear.
The air compressor flywheel and motor pulley must be in-line (in the same plane)
within 1/16" (1.6 mm) to assure belt retention within flywheel belt grooves. To check
alignment, perform the following steps:
1. Set the Auto/Off lever to "Off", unplug unit and relieve all air pressure from the
air tank.
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).
5. If the difference is greater 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. Tighten the motor drive pulley set screw.
7. Visually inspect the motor drive pulley to verify that it is perpendicular 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. Torque to 70-100 in-lbs
(7.9-11.3 Nm).
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.
AIR COMPRESSOR HEAD BOLTS - TORQUING
The air compressor pump head bolts should be kept properly torqued. Check
the torques of the head bolts after the first five hours of operation. Torque to
28–39 ft.-lbs (38.0-52.9 Nm).