Dewalt DXCMH1393075 Instruction Manual - Page 22

Air Compressor Pump Intake and Exhaust, Inspect Air Lines and Fittings for Leaks, Air compressor

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English 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. 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 difference 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 perpendicular 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 compressor 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/ piping. 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). Service and Adjustments ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN. WARNING: To avoid personal injury, always shut off the gasoline engine and relieve all air pressure from the system before performing any service on the air compressor. Do not use the unit with the shrouds or belt guard removed. Serious injury could 22

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22
English
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. 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 difference 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/
piping.
5. Correct any leaks found.
6. Reconnect spark plug wire.
I
MPORTANT:
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).
Service and Adjustments
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED
MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN.
WARNING
: To avoid personal injury, always shut off the gaso-
line engine and relieve all air pressure from the system before
performing any service on the air compressor. Do not use the
unit with the shrouds or belt guard removed. Serious injury could