Service And Adjustments; To Replace Or Clean Check Valve; To Replace Regulator - Craftsman 919.167321 Instrucciones De Seguridad E Instalación

ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE
PERFORMED BY TRAINED SERVICE TECHNICIAN.
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 an adjustable wrench,
loosen outlet tube nut at air tank
and pump. Carefully move outlet
tube away from check valve.
Outlet Tube
Pressure
Relief
Tube
Nut
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.
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.

SERVICE AND ADJUSTMENTS

Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to
Nut
Check
Valve
In open
position
nothing 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.

To Replace Regulator

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. Remove the outlet pressure
gauge and quick connect (if
equipped) from the regulator.
17 - ENG
Screwdriver
In closed position
disc is visible.
A17883