Maintenance; Air Filter - Inspection And Replacement; Check Valve -Replacement; Safety Valve - Inspection - Craftsman 919.727350 Owner'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 PERFORMING ANY MAINTENANCE OR REPAIR, UNPLUG THE COMPRES-
SOR AND BLEED OFF ALL AIR PRESSURE.
ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE DONE BY A QUALIFIED SERVICE TECHNICIAN.

Air Filter - Inspection and Replacement

Hot surfaces. Risk of burn. Compressor
heads are exposed when filter cover is
removed. Allow compressor to cool prior to
servicing.
Filter
Keep the air filter clean at all times. Do not operate the
compressor with the air filter removed.
A dirty air filter will not allow the compressor to operate at
full capacity. Before you use the compressor, check the
air filter to be sure it is clean.
Check Valve Cleaning - Replacement
Risk of personal injury. Manifold assembly
contains compressed air which can be
hazardous. Manifold gets hot during opera-
tion. 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. Remove shroud. (Key Nos. 1 and 2)
3. Loosen the top and bottom nuts and remove the
outlet tube. (Key Nos. 31, 33, and 34)
4. Remove the pressure release tube, fitting, and
connector. (Key Nos. 25, 26 and 27)
5. Unscrew the check valve (turn counterclockwise)
using a socket wrench. (Key No. 17)
6. 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.
7. Apply a Teflon based pipe sealant to the check
valve threads. Reinstall the check valve (turn
clockwise).
D20418 Rev. 0 2/22/00

MAINTENANCE

Filter Retainer
10 — ENG
8. Replace the pressure release tube and fitting.
9. Replace the outlet tube and tighten top and
bottom nuts.
10. Replace the shroud.

Safety Valve - Inspection

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.

Motor

The motor has an automatic reset thermal overload pro-
tector. If the motor overheats for any reason, the over-
load protector will shut off the motor. The motor must be
allowed to cool down before restarting. The compressor
will automatically restart after the motor cools.
If the overload protector shuts the motor off frequently,
check for a possible voltage problem. Low voltage can
also be suspected when:
1. The motor does not get up to full power or speed.
2. Fuses blow out when starting the motor; lights dim
and remain dim when motor is started and is
running.

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.