Craftsman 919.195411 Owner's Manual page 20

ALL SERVICE AND REPAIR
OPERATIONS NOT DESCRIBED
iN THiS MANUAL MUST BE
PERFORMED BY A TRAINED
SERVICE TECHNiCiAN.
cycmes 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 electrica_ supply to
the air compressor, bleed tank
of pressure, and allow the air
compressor to cool
To Replace or Clean Check
Valve
1. Reiease all air pressure from air
tank. See "To Drain Tank" in the
"Maintenance" section.
2= Unplug air compressor
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 retief tube nut
at air tank and pressure switch=
Carefully move pressure relief
tube away from check valve.
5. Unscrew the check valve (turn
counterclockwise) using a 7/8"
open end wrench. Note the
orientation for reassembty.
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 hoids the valve
disc in the closed position; if not
moving freely the check valve
needs to be cleaned or replaced=
'. Screwdriver
In open
position ........... ,
nothing is
visible.
mn dosed position
disc is visible.
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=
A09713 20-ENG