4. Drain air tank.
5. Remove belt guard.
6. Place a straightedge against the outside of the flywheel and the
engine drive pulley.
7. Measure the distance between the edge of the belt and
the straightedge at points A1 and A2 in figure. The differ-
ence between measurements should be no more than 1/16"
(1.6 mm).
8. If the difference is greater than 1/16" (1.6 mm) loosen the set
screw holding the engine 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.
9. Tighten the engine drive pulley set screw.
10. Visually inspect the engine drive pulley to verify that it is per-
pendicular to the drive engine shaft. Points B1 and B2 of Figure
should appear to be equal. If they are not, loosen the setscrew
of the engine drive pulley and equalize B1 and B2, using care
not to disturb the belt alignment performed in step 2.
11. Retighten the engine drive pulley setscrew. Torque to
145–180in lbs (16.4–20.3 Nm).
12. Reinstall belt guard.
13. Reconnect spark plug wire.
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. Ensure engine START/RUN/OFF switch (C) is in the OFF
Position.
2. Allow the unit to cool.
3. Disconnect spark plug wire.
4. Apply a soap solution to all air line fittings and connections/pip-
ing.
5. Correct any leaks found.
6. Reconnect spark plug wire.
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 32-37 ft.-lbs. (43.4-50.2 Nm).
Additional Service
Disassembly or service of the air compressor beyond what is cov-
ered in this manual is not recommended. If additional service is
required, contact your nearest Authorized Warranty Service Center.
Accessories
Recommended accessories for use with your tool are available for
purchase from your local dealer or authorized service center. If you
need assistance in locating any accessory for your tool, please call
1-888-895-4549 or visit our website www.dewalt.com.
WARNING: The use of any other accessory not recommended
for use with this tool could be hazardous. Use only accessories
rated equal to or higher than the rating of the air compressor.
Service Information
Please have the following information available for all service calls:
Model Number ____________ Serial Number ___________
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