Service And Adjustments - Craftsman 919.168700 Owner's Manual

To Replace or Clean Check
Valve
1. Release all air pressure from air
tank. See "To Drain Tank" in the
"Maintenance" section.
2. Set the On/Auto/Off lever to "Off"
and unplug unit.
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 and pressure switch.
Carefully move pressure relief
tube away from check valve.

SERVICE AND ADJUSTMENTS

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.
17- ENG A09711