Air Compressor Pump Intake And Exhaust Valves; Inspect Air Lines And Fittings For Leaks; Service And Ad Just Ments - DeWalt DXCM301 Instruction Manual

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 (O)", unplug the 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 per-
pendicular to the drive motor shaft. Points B1 and B2 of Figure
should appear to be equal. If they are not, loosen the set screw
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 set screw.
Torque to 145–180 in.-lbs (16.4–20.3 Nm).
9. Reinstall belt guard.
Air Compressor Pump Intake and Exhaust
Valves
Once a year have a Trained Service Technician check the air com-
pressor pump intake and exhaust valves.

Inspect Air Lines and Fittings for Leaks

1. Set the Auto/Off lever to "OFF (O)", unplug the unit, and relieve
all air pressure from the air tank.
2. Apply a soap solution to all air line fittings and connections/
piping.
3. Correct any leaks found.
IMPORTANT: Even minor leaks can cause the air compressor
to overwork, resulting in premature breakdown or inadequate
performance.
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 8-11 ft.-lbs. (11-15 Nm).
Service and Adjustments
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED
MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN.
Risk of unsafe operation. Unit cycles automati-
cally when power is on. When servicing, you may be exposed
to voltage sources, compressed air, or moving parts. Before
servicing unit unplug or disconnect electrical supply to the air
compressor, bleed tank of pressure, and allow the air compres-
sor to cool.
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