Use and Care Manual

Operating Instructions
Troubleshooting Guide (Continued)
SYMPTOM CAUSE SOLUTION
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12
Insufficient pressure at
point of use
1� Leaks or restriction
2.Restrictedairintake
3� Slipping belts
4� Service hose or pipe too
small
5.Excessiveairrequirement
6.Brokenvalve
1.Checkforleaksorrestrictioninhoseorpiping.Repairorreplace.
2� Clean or replace air filter element�
3� Tighten belts, See “Maintenance” section�
4.Replacewithlargerhoseorpipe.
5� Limit air usage to compressor capacity by using fewer or smaller
tools�
6.Replacereedvalveassembly.
Tank does not hold
pressure when
compressor is unloaded
Airleakinsystem Locate and repair leak�
Never attempt to repair or modify a tank
Excessivebeltwear 1.Pulleyoutofalignment
2.Beltstootight
3.Beltstooloose
4.Pulleyorflywheelwobble
5� Damage in belt groove of
pulley or flywheel
1.Realignmotorpulleywithcompressorflywheel.
2.Adjusttension.See“Maintenance”section.
3.Adjusttension.See“Maintenance”section.
4� Check for worn crankshaft, keyway or pulley bore, resulting from
running with loose pulleys� Check for bent crankshaft�
5.Filesmoothorreplace.
Excessivedischargeair
temperature
1� Dirty cooling surfaces
2.Poorventilation
3.Blownheadgasket
4.Restrictedairintake
5� Worn valves
1� Clean cooling surfaces of cylinder, intercooler and discharge tube�
2� Improve ventilation or relocate compressor�
3.Replaceheadgasket.
4� Clean or replace air filter element�
5.Replacevalveplateassembly.
Tank pressure builds up
slowly
1� Dirty air filter
2.Blowncylinderhead
gasket
3� Worn or broken intake or
discharge valves
4.Airleaks
5� Loose belts
6� Speed too slow
1� Clean or replace filter element�
2� Install new gasket�
3� Install new valve plate assembly
4� Tighten joints
5� Tighten belts� See “Maintenance” section
6.Checkspeed.See“Performance”chart
Tank pressure builds up
quickly on compressor
1� Water in tank
2� Speed too fast
1.Draintank.(ThisshouldbedoneDAILY).
2� Check speed� See specifications in replacement parts list�
Compressor continues
to build up pressure
after unloading pressure
is reached
1� Severe air leak in pilot
unloader valve
2.Restrictioninunloader
lines
1� Check all fittings and lines and replace those which leak�
2.Removecauseofrestriction.
Enginestalls Toggle lever on pilot
unloader valve in loaded
position
Fliptogglelevelupintotheunloadposition.
Gasoline engine will not
start
Low engine oil� Some
engines equipped with low-
oil shutdown
Addoiltoproperlevel.
ASMEsafetyvalvepops
open while compressor
is running
1� Wrong unloader valve
setting
2.DefectiveASMEsafety
valve
1.Adjusttolowerpressure(175maximumpsifortwo-stageunitor
125 psi for single stage unit)� See Operation section�
2.Replacevalve.