22
MOTOR PULLEY/FLYWHEEL ALIGNMENT
The air compressor flywheel and motor pulley must be
in-line (in the same plane) within 1/16 in. (1.6 mm) to
assure belt retention within the flywheel belt grooves.
To check the alignment, perform the following steps:
□
Turn the air compressor off, lock out the power
supply, and relieve all air pressure from the air
tank.
□
Remove outer belt guard.
□
Place a straightedge (4) against the outside
of the flywheel (1) and the motor drive
pulley hub (3).
□
Measure the distance between the edge of the
belt (2) and the straightedge at points A1 and A2.
The difference between measurements should
be no more than 1/16 in. (1.6 mm).
□
If the difference is greater than 1/16 in.
(1.6 mm), loosen the set screws holding the
motor drive pulley (3) to the shaft and adjust the
pulley’s position on the shaft until the A1 and A2
measurements are within 1/16 in. (1.6 mm) of
each other.
□
Tighten the motor drive pulley set screws. Torque
to 115-125 in-lbs (13.0-14.1 Nm)
□
Visually inspect the motor drive pulley to verify
that it is perpendicular to the drive motor shaft.
The points (B1 and B2) should appear to be
equal. If they are not, loosen the set screws
of the motor drive pulley and equalize B1 and
B2, using care not to disturb the belt alignment
performed previously.
□
Retighten the motor drive pulley set screws.
Torque to 115-125 in-lbs (13.0-14.1 Nm).
□
Reinstall the outer belt guard.
A1= A2 (MEASURED)
B1= B2 (VISUAL)
A1
A2
B1
B2
1
2
3
4
Maintenance (continued)
