Craftsman 919.72755 - Manuel (Page 12)

12 - ENG D23122
SERVICE AND ADJUSTMENTS
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.
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. Remove the hose by removing the hose clamp.
NOTE: The hose clamp is not reusable. You must pur-
chase a new hose clamp, see the Parts List Manual or
purchase a standard hose clamp at a local hardware
store.
4. Unscrew the check valve (turn counter-clockwise)
using a socket wrench.
5. 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.
6. Apply sealant to the check valve threads. Reinstall
the check valve (turn clockwise).
7. Replace hose and new hose clamp.
8. Perform the Break-in Procedure. See “Break-in
Procedure” in the Operation section.
Check
Valve
Hose Clamp
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 outlet
pressure gauge and hose adapter from the regula-
tor.
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. Reapply pipe sealant to outlet pressure gauge
and hose adapter.
8. Reassemble outlet pressure gauge and hose
adapter. Orient outlet pressure gauge to read cor-
rectly. Tighten securely.
Regulator
Arrow
Before servicing:
Unplug or disconnect electrical supply to the
air compressor.
Bleed tank of pressure
Allow the air compressor to cool.
Nipple
Regulator
Outlet
Pressure
Gauge
Hose
Adapter
Regulator