Service And Adjustments; Maintenance; To Replace Or Clean Check Valve; To Replace Regulator - Craftsman 919.167240 Operator's Manual

Unit cycles automatically when power is on. When doing Maintenance, you may be exposed
to voltage sources, compressed air or moving parts. Personal injuries can occur. Before per-
forming any Maintenance or repair, unplug the compressor and bleed off all air pressure.
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PERFORMED BY
TRAINED SERVICE TECHNiCiAN.
Before servicing:
• Unplug or disconnect electrical supply to the
air compressor.
Bleed tank of pressure.
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. Unplug outfit.
3. Loosen the nut on the outlet tube and move the
outlet tube to the side.
To Replace Regulator
1. Release all air pressure from air tank. See "To
Drain Tank" in the Maintenance section.
2. Unplug outfit.
3. Using an adjustable wrench remove the gauges
and quick connect from the regulator.
4. Remove the regulator.
5. Apply pipe sealant tape to the nipple on the
standpipe.
6. Assemble the regulator and orient as shown.
NOTE: Arrow indicates flow of air.
Make sure it is pointing in the
direction of air flow.
7_
8.
Reapply pipe sealant to
gauges and quick connect.
Reassemble gauges and
quick connect. Orient gauges
to read correctly. Tighten quick connect with
wrench.
4_
5.
6_
7.
8.
Unscrew the check valve (turn counterclockwise)
using a socket wrench.
Make sure the valve disc moves freely inside the
check valve and the spring holds the disc in the
upper, closed position. The check valve may be
cleaned with a solvent, such as paint and varnish
remover.
Apply sealant to the check valve threads. Reinstall
the check valve (turn clockwise).
Replace the pressure outlet tube and tighten the
nut.
Perform the Break-in Procedure. See "Break-in
Procedure" in the Operation section.
13-Eng D21996