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DeWalt DXCM803 Guide D'utilisation page 21

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Motor Pulley/Flywheel Alignment
NOTE: To correct misalignment, 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 outer belt guard.
3.
Place a straightedge against the outside of the flywheel.
4.
Measure the distance between the edge of the belt and the
straightedge at points A1 and A2. 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. Torque to 145-160
in-lbs. (16.4-18.1 Nm).
7.
Visually inspect the motor drive pulley to verify that it is
perpendicular to the drive motor shaft. Points B1 and B2
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 5.
8.
Re-tighten the motor drive pulley set screw.
Torque to 145-160 in.-lbs. (16.4- 18.1 Nm).
9.
Reinstall outer 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.
Inspect Air Lines and Fittings for Leaks
1. Turn the Auto/Off switch to "Auto (1)" and allow tank pressure
to build. Motor will stop when tank pressure reaches "cut-out"
pressure.
2. Set the Auto/Off switch to "Off (O)" and unplug unit.
3. Apply a soap solution to all air-line fittings and connections/
piping to look for any leaks.
4. Pull ring on safety valve allowing air to bleed from the tank
until tank pressure is approximately 20 PSI. Release safety
valve ring.
5. Drain water from air tank by opening drain valve on bottom
of tank.
6. 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 20-24 ft. -lbs. (28-32 Nm).
21

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