To Replace Or Clean Check Valve; Additional Service; Service Information - DeWalt DXCMH1393075 Instruction Manual

occur from contact with moving parts. Hot surfaces. Risk of burn.
Pump head, and surrounding parts are very hot, do not touch (see
the Hot Surfaces identified in Fig. 2). Allow compressor to cool
prior to servicing.
To Replace or Clean Check Valve
1. Ensure engine START/RUN/OFF switch (C) is in the OFF
Position.
2. Allow the unit to cool.
3. Disconnect spark plug wire.
4. Release all air pressure from air tank. See Draining Air Tank in
the Maintenance section.
5. Using an adjustable
wrench loosen outlet
tube nut at air tank and
pump. Carefully move
outlet tube away from
check valve.
6. Using an adjustable
nothing is
wrench loosen pres-
sure relief tube nut
at air tank. Carefully
move pressure relief
tube away from check valve.
7. Unscrew the check valve (turn counterclockwise) using a 7/8"
open end wrench. NOTE the orientation for reassembly.
8. 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.
9. Clean or replace the check valve. A solvent, such as paint or
varnish remover can be used to clean the check valve.
Screwdriver
In open
position
visible.
In closed position
disc is visible.
10. Apply sealant to the check valve threads. Reinstall the check
valve (turn clockwise).
11. Replace the pressure release tube. Tighten nuts.
12. Replace the outlet tube and tighten nuts.
13. Reconnect spark plug wire.
14. 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
center, a D WALT authorized service center or other qualified
e
service personnel. Always use identical replacement parts.
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WALT factory service
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