Service And Adjustments; To Replace Check Valve - Craftsman 919.167620 Owner's Manual

_Risk of unsafe
operation. Unit
cycles automatically when power is
on. When doing Maintenance, you
may be exposed to voltage sources,
compressed air or moving parts.
Personal injuries can occur.
Before servicing:
= Unplug or disconnect
electrical supply to the air
compressor.
• Bleed tank of pressure.
• Allow the air compressor to
cool
ALL MAINTENANCE AND REPAIR
OPERATIONS NOT LISTED MUST
BE PERFORMED BY TRAINED
SERVICE TECHNICIAN.
TO REPLACE CHECK VALVE
1. Release all air pressure from air
tank. See "To Drain Tank" in the
Maintenance section.
2. Unplug outfit.
3. Remove the shroud on the outlet
tube side. NOTE: Remove screw
with T-20 Torx screwdriver and
loosen all the tabs on the shroud
with a flat screwdriver before
removing.
5,
6,
7,
Using an
adjust-
able
wrench
loosen
pressure
relief
tube nut
at air
tank.
Carefully Pressure Relief Tube
move pressure relief tube away
from check valve
Unscrew the check valve (turn
counterclockwise) using a 7/8"
open end wrench. Note the orien-
tation for reassembly.
Using a screwdriver, carefully push
the valve disc up and down.
position
nothing is
visible.
In closed position
disc is visible.
Using an adjustable wrench, loos-
en outlet tube nut at air tank and
pump head. Carefully move outlet
tube away from check valve.
NOTE: The valve disc should move
freely up and down on a spring which
holds the valve disc in the closed posi-
tion; if not the check valve needs to be
replaced.
8. Install the new check valve (turn
clockwise).
9. Replace the pressure release tube.
Tighten nut.
10. Replace the outlet tube and tight-
en nuts.
11. Replace the shroud.
12. Perform the Break-in Procedure.
See "Break-in Procedure" in the
Operation section.
17-ENG 1000002923