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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

EWALT technician or your dealer.

Problem Code

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 ..........................................................................................................................6,13,14,15,16,17,18,19

Excessive belt wear ...................................................................................................................13,14,16,19,20

Squealing sound ........................................................................................................................13

Engine will not run .....................................................................................................................21,22,23,34

Pressure reading on the regulated pressure gauge drops when an accessory is used ...........24

Regulator knob has continuous air leak ....................................................................................25

Regulator will not shut off air outlet ...........................................................................................25

Moisture in pump crankcase ......................................................................................................2,5,11,26,27,28,29,30,31

Pump will not run .......................................................................................................................32

Air tank pressure will not build ...................................................................................................32,33