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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 approxi-
mately 1/4" belt deflection measured midway be-
tween the pulley and flywheel when a 3 pound
weight or equivalent finger pressure is applied at
this point. A loose belt will squeal at compressor
start-up.
7.
Replace beltguardand
screws.
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 compressor
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 straightedge
on both
sides
of the
motor shaft.
TROUBLESHOOTING
GUIDE
UNIT CYCLES AUTOMATICALLY
WHEN POWER IS ()N. WHEN DOING MAINTENANCE,
YOU MAY BE
EXPOSED TO VOLTAGE SOURCES, COM PRESSED AIR OR MOVING PARTS. PERSONAL INJURIES CAN
OCCUR. BEFORE PERFORMING
MAINTENANCE
OR REPAIR, TURN OFF AND LOCK OUT ELECTRIC
POWER AND BLEED OFF AIR TAN K PRESSURE. N EVER OPERATE TH ECOMPRESSOR
WITH THE BELT
GUARD REMOVED.
PROBLEM
CAUSE
CORRECTION
Excessivetankpressure-safety
Pressure switch does not shut off motor
Pressureswitchmustbereplaced.
valve pops off.
when compressor reaches "cut-out" pres-
sure.
Air leaks at fittings or hose.
Tube or hose fittings are not tight enough.
Defective or dirty check valve.
Defective pressure switch release valve.
Defective air tank.
Air leaks at check valve.
Air leaks at pressure switch re-
leasevelve.
Air leaks at air tank welds.
Air leak from safety valve.
Possible defect in safety valve.
Restricted check valve. *
Loose pulley.
Low oil level.
Loose flywheel.
Loose compressor
bolts.
Loose belt.
Carbon build-up.
Tighten fittings where air can be heard escaping.
Check fittings under soapy water solution. DO NOT
OVER-TIGHTEN.
Removeand 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 OTHER-
WISE MODIFY AIR TANK. IT WILL BE
WEAKENED.
Operate safety valve manually be pulling on dng. 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-
merit above.
Remove the head and valve plate. Clean the velve
plate and thetop of the piston. (Be sure carbon does
not fall intothe cylinder.) Reassemble to 25-30 ft.lbs.
using new gasket and torque screws.
10-
Eng
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