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English
Troubleshooting Guide
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or
maintenance personnel can perform some corrective actions, and others may require the assistance of a qualified D
e
W
ALT
technician or
your dealer.
Excessive air tank pressure-safety valve pops off
......................................................................1
Air leaks
....................................................................................................................................2
Continuous air leak at unloader valve.
......................................................................................
3
Air leaks in air tank or at air tank welds
....................................................................................4
Air leaks between head and valve plate
....................................................................................5
Air leaks from safety valve
.........................................................................................................
6
Compressor is not supplying enough air to operate accessories
............................................
2, 7, 8, 9, 10, 12, 13
Restricted air intake.
..................................................................................................................12
Excessive vibration
....................................................................................................................14, 15
Knocking Noise
.........................................................................................................................
13, 14, 15, 16, 17, 18, 19
Excessive belt wear
...................................................................................................................
13,14,16,19,20
Squealing sound
........................................................................................................................
13
Engine will not run
.....................................................................................................................
22, 24, 30
Moisture in pump crankcase
.....................................................................................................
5, 11, 23, 24, 25, 26, 27, 28
Pump will not run
.......................................................................................................................29
Air tank pressure will not build
..................................................................................................29
Troubleshooting Codes
CODE
POSSIBLE CAUSE
POSSIBLE SOLUTION
1
Unloader valve does not release pressure when air
tank reaches
blow-off
pressure
Unloader valve must be replaced. Contact a D
e
WALT factory ser
-
vice center or a D
e
WALT authorized service center.
2
Fittings are not tight
Tighten fittings where air can be heard escaping. Check fittings
with soapy water solution. DO NOT OVERTIGHTEN.
Summary of Contents for DXCMH1393075
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