Pulley And Flywheel - Alignment; Troubleshooting Guide - Sears CRAFTSMAN 919.184160 Manual Del Usuario

NOTE
The belt should be centered over the
grooves on the flywheel and motor pulley.
6. Push the motor back into regular position and tighten
bolts securely. Proper tension is approximately 1/4"
belt deflection measured midway between the pul-
ley and flywheel when a 3 pound weight or equiva-
lent finger pressure is applied at this point. A loose
belt will squeal at compressor start-up.
7. Replace beltguard and screws.
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 MAINTENANCE OR REPAIR, TURN OFF AND LOCK OUT
ELECTRIC POWER AND BLEED OFF AIR TANK PRESSURE. NEVER OPERATE THE COMPRESSOR
WITH THE BELT GUARD REMOVED.
PROBLEM
Excessive tank pressure - safety
valve pops off.
Air leaks at fittings or hose.
Air leaks at check valve.
Air leaks at pressure switch re-
lease valve.
Air leaks at air tank welds.
Air leak from safety valve.
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TROUBLESHOOTING GUIDE

CAUSE
Pressure switch does not shut off motor
when compressor reaches "cut-out" pres-
sure.
Tube or hose fittings are not tight enough.
Defective or dirty check valve.
Defective pressure switch release valve.
Defective air tank.
Possible defect in safety valve.
Restricted check valve.
Loose pulley.
Low oil level.
Loose flywheel.
Loose compressor bolts.
Loose belt.
Carbon build-up.
11 — Eng

Pulley and Flywheel - Alignment

The compressor flywheel and motor pulley must be inline
(in the same plane) within 1/16" to assure belt retention
within sheave grooves. The motor mounting holes on the
saddle are skewed to square the motor with the com-
pressor mounting hole as the belt is tensioned. To check
alignment, disconnect electrical power and remove the
belt guard. Place a straightedge against the outside of the
flywheel and measure the distance from it to the nearest
groove. Alignment is achieved when the other end of the
straightedge is within 1/16" of the measured dimension
at the pulley grooves. Squareness is achieved when the
pulley grooves are an equal distance from the straight-
edge on both sides of the motor shaft.
CORRECTION
Pressure switch must be replaced.
Tighten fittings where air can be heard escaping.
Check fittings under soapy water solution. DO NOT
OVER-TIGHTEN.
Remove and clean or replace check valve. DO NOT
OVER-TIGHTEN.
Remove and replace the release valve.
Air tank must be replaced.
DO NOT DRILL INTO, WELD OR
OTHERWISE MODIFY AIR TANK. IT
WILL BE WEAKENED.
Operate safety valve manually be pulling on ring. If
valve still leaks, it should be replaced.
Remove and clean or replace.
Tighten pulley set screw.
Maintain prescribed oil level.
Tighten screw.
Check bolts. Tighten as required.
Tighten belt as per instructions under Belt Replace-
ment above.
Remove the head and valve plate. Clean the valve
plate and the top of the piston. (Be sure carbon does
not fall into the cylinder.) Reassemble to 25-30 ft.lbs.
using new gasket and torque screws.
D20410