Sears 919.727121 owner manual Maintenance, Check Valve Replacement Safety Valve Inspection

MAINTENANCE

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 PERFORMING ANY MAINTENANCE OR REPAIR, UNPLUG THE COMPRESSOR AND BLEED OFF ALL AIR PRESSURE.

ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE DONE BY QUALIFIED SERVICE PERSONNEL.

Check Valve - Replacement Safety Valve - Inspection

Before servicing:

•Unplug or disconnect electrical supply to compressor.

•Bleed tank of pressure.

•Allow compressor to cool.

1.Release all air pressure from air tank and unplug outfit.

2.Loosen the bottom nut and move the outlet tube to the side.

3.Unscrew the check valve (turn counterclockwise) using a socket wrench.

4.Check that the valve disc moves freely inside the check valve and that 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.

5.Apply sealant to the check valve threads. Reinstall the check valve (turn clockwise).

6.Replace the outlet tube and tighten the bottom nut.

If the safety valve does not work properly, over-pressurization may occur, causing air tank rupture or an explosion. Before starting compressor, pull the ring on the safety valve to make sure that the safety valve operates freely. If the valve is stuck or does not operate smoothly, it must be replaced with the same type of valve.

Storage

Before you store the air compressor, make sure you do the following:

1.Review the “Maintenance” and "Operating Procedures" sections and perform maintenance as necessary. Be sure to drain water from the air tank.

2.Protect the electrical cord and air hose from damage (such as being stepped on or run over). Wind them loosely around the compressor handle.

Store the air compressor in a clean and dry location.

11 — ENG D20414 Rev. 0 2/15/00