Craftsman 919.167783 Owner's Manual page 18

ALL MAINTENANCE AND REPAIR
OPERATIONS NOT LISTED MUST
BE PERFORMED BY A TRAINED
SERVICE TECHNICIAN.
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 emectdcamsupply to
the air compressor, b_eed tank
of pressure, and allow the air
compressor to cool
To RepJace or CJean Check
VaJve
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 unpiug unit.
3. Using a phillips screwdriver,
remove the air filter cover.
4. Remove the rear shrouds using
T-20 torx wrench.
5. Using an adjustable wrench,
loosen outlet tube nut at air tank.
Carefuily 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.
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 hoids the valve
disc in the closed position; if
not the check valve needs to be
cleaned or replaced.
position
nothing is _ ....
visibBe.
mn closed position
disc is visibme.
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.
A09710 18- ENG