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21
English
cally when power is on. When servicing, you may be exposed
to voltage sources, compressed air, or moving parts. Before
servicing unit unplug or disconnect electrical supply to the air
compressor, bleed tank of pressure, and allow the air compres-
sor to cool.
To Replace or Clean Check Valve
1. Release all air pressure from air tank. See Draining Air Tank in
the Maintenance section.
2. Set the Auto/Off lever to “Off”, shut off the main power discon-
nect, and relieve all air pressure from the air tank.
3. Using an adjustable
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
wrench loosen outlet
tube nut at air tank
and pump. Carefully
move outlet tube
away from check
valve.
4. Using an adjustable
wrench loosen pres-
sure relief tube nut
at air tank. Carefully
move pressure relief tube away from check valve.
5. Unscrew the check valve (turn counterclockwise) using a 7/8”
open end wrench. NOTE the orientation for reassembly.
6. Using a screwdriver, carefully push the valve disc up and
down. NOTE: The valve disc should move freely up and down
on a spring which holds the valve disc in the closed position, if
not the check valve needs to be cleaned or replaced.
7. Clean or replace the check valve. A solvent, such as paint or
varnish remover can be used to clean the check valve.
8. Apply sealant to the check valve threads. Reinstall the check
valve (turn clockwise).
9. Replace the pressure release tube. Tighten nuts.
10. Replace the outlet tube and tighten nuts.
11. Perform the Break-in Procedure. See Break-in Procedure in
the Operation section.
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 ___________
Date and Place of Purchase ____________________________
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment should be performed by a D
e
WALT factory service
center, a D
e
WALT authorized service center or other qualified
service personnel. Always use identical replacement parts.
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