Motor Pulley/Flywheel Alignment; Adjusting Belt Tension - DeWalt DXCM603 Instruction Manual

1. Set the Auto/Off lever
to "OFF (0)", unplug the
unit, and relieve all air
pressure from the tank.
2. Remove the outer belt
guard (Z).
3. Mark motor position
on saddle.
4. Loosen the motor
mounting screws and
slide the motor toward the air compressor pump.
5. Remove the belt and replace with a new one.
6. See the Adjusting Belt Tension before tightening motor
mounting screws.

ADJUSTING BELT TENSION

1. Slide motor into original position, line the motor up with the
mark made earlier on saddle.
2. Tighten two outside motor mounting screws enough to hold
the motor in place for checking pulley and flywheel align-
ment.
3. The belt should deflect 1/4" (6.5 mm) at midway between
the pulley and the flywheel when a 10 pound (4.5 kg.) weight
is applied at the mid-
way point.
4. When proper belt
tension is achieved,
tighten motor mount-
ing screws. Torque to
20-25 ft-lbs
(27.1-33.9 Nm).
NOTICE: 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.
Verify the alignment by performing the following Motor Pulley/
Flywheel - Alignment.

MOTOR PULLEY/FLYWHEEL ALIGNMENT

Fig. 23
The air compressor flywheel and motor pulley hub must be
in-line (in the same plane) within 1/16" (1.6 mm) to assure belt
retention within flywheel belt grooves. To correct misalignment,
perform the following steps:
22
Downward Force
Deflection