Craftsman 919.167783 Owner's Manual page 18

ALL MAINTENANCE AND REPAIR
OPERATIONS NOT LISTED MUST
BE PERFORMED BY A TRAINED
SERVICE TECHNICIAN.
Risk of Unsafe
Operation. Unit
cycles automatically 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
compressor to cool.
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 a phillips screwdriver,
remove the air filter cover.
4. Remove the rear shrouds using
T-20 torx wrench.
Outlet Tube
7.
8.
Unscrew the check valve (turn
counterclockwise) using a 7/8"
open end wrench. Note the
orientation for reassembly.
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.
open
position
nothing is
visible,
tn closed position
disc is visible.
5. Using an adjustable wrench,
loosen outlet tube nut at air tank.
Carefully move outlet tube away
from check valve.
6. Using an adjustable wrench
loosen pressure relief tube nut at
air tank. Carefully move pressure
relief tube away from check
valve.
D30087
9. Clean or replace the check valve.
A solvent, such as paint or
varnish remover can be used to
clean the check valve.
10. Apply sealant to the check valve
threads. Reinstall the check valve
(turn clockwise).
11. Replace the pressure release
tube. Tighten nut.
12. Replace the outlet tube and
tighten nut.
13. Replace the shroud and air filter.
14. Perform the Break-in Procedure.
See "Break-in Procedure" in the
Operation section.
18- ENG