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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", unplug the unit, and relieve all
air pressure from the air tank.
3.
Using an adjustable wrench loosen outlet tube nut at air tank
and pump. Carefully move outlet tube away from check valve.
4.
Using an adjustable wrench loosen pressure relief tube nut at
air tank. Carefully move pressure relief tube away from check
valve.
5.
Unscrew the check
valve (turn counter-
clockwise) using a
13/16" open end
wrench. NOTE: the
In open
orientation for
position
reassembly.
nothing is
6.
Using a screw-
visible.
driver, 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) to proper orientation.
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.
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
Screwdriver
Please have the following information available for all service calls:
Model Number ____________ Serial Number ___________
Date and Place of Purchase ____________________________
Repairs
In closed position
To assure product SAFETY and RELIABILITY, repairs, maintenance
disc is visible.
and adjustment should be performed by a D
center, a D
service personnel. Always use identical replacement parts.
21
WARNING: The use of any other accessory not recommended
WALT authorized service center or other qualified
e
WALT factory service
e
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