Craftsman 919.167551 - Manual (Page 16)

16- ENG
5. Unscrew
Check
Valve
Outlet
Tube
Nuts
the
check
valve
(turn
counter-
clock-
wise)
using a
7/8"
open
end
wrench.
6. Using a screwdriver, carefully push
the valve disc up and down.
In closed position
disc is visible.
In open
position
nothing is
visible.
Screwdriver
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.
7. Install the new check valve (turn
clockwise).
8. Replace the outlet tube and tight-
en nuts.
9. Replace the shroud.
SERVICE AND ADJUSTMENTS
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.
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.
4. Using an adjustable wrench, loos-
en outlet tube nut at air tank and
pump head. Carefully move outlet
tube away from check valve.