28
English
Troubleshooting Codes
Code Possible Cause
Possible Solution
1
Fittings are not tight.
Tighten fittings where air
can be heard escaping.
Check fittings with soapy
water solution. DO NOT
OVERTIGHTEN.
2
Defective tank.
Tank must be replaced. Do
not repair the leak.
DANGER: Risk of bursting. Do
not drill into, weld or otherwise
modify tank or it will weaken. The
tank can rupture or explode.
3
Leaking seals.
Contact a D
E
WALT factory
service center or a D
E
WALT
authorized service center.
4
Defective safety valve.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it must be replaced.
5
Prolonged excessive
use of air.
Decrease amount of air
usage.
6
Air compressor is
not large enough for
accessory.
Check the accessory
air requirement. If it is
higher than the SCFM or
pressure supplied by your
air compressor, a larger air
compressor is needed to
operate accessory.
Code Possible Cause
Possible Solution
7
Hole in air hose.
Check air hose, replace if required.
8
Operating in damp or
humid conditions.
Move unit to a dry, well
ventilated area.
9
Restricted air intake filter.
Clean or replace air intake filter.
10
Loose belt.
Check belt tension, see
Adjusting Belt Tension under
Maintenance, page 22.
11
Loose pulley.
Tighten pulley set screw,
torque to 120-130 in.-lbs
(13.6-14.7 Nm).
12
Loose flywheel.
Tighten flywheel screw, torque
to 20-24 ft-lbs (27-32 Nm).
13
Carbon build-up in
pump.
Contact a D
E
WALT factory
service center or a D
E
WALT
authorized service center.
14
Belt too tight.
Check belt tension, see
Adjusting Belt Tension under
Maintenance, page 22.
15
Pulley misalignment.
See Motor Pulley/
Flywheel Alignment under
Maintenance, page 22.
16
Pump oil is low.
Add full synthetic, non-
detergent air compressor
oil to pump. See Air
Compressor Pump Oil under
Maintenance, page 21.
