Section 5
MAINTENANCE
39
Continued on page 40
5.11 TROUBLESHOOTING GUIDE
SYMPTOM PROBABLE CAUSE REMEDY
MPROPER UNLOADING
WITH AN EXCESSIVE
PRESSURE BUILD-UP
CAUSING PRESSURE
RELIEF VALVE TO
OPEN
(CONTINUED)
Running Blowdown Valve Pressure
Regulating Valve Set Too High
Readjust.
Leak in Control System Causing
Loss of Pressure Signal
Check control lines.
Worn seals in inlet valve. Replace seals (kit
available).
Defective pressure regulating valves; repair
valves (kits available).
Inlet Valve Jammed Free or replace valve.
Restriction in the Control System Check all control lines and components.
Ice and other contaminants could cause
restrictions.
Defective Pressure Relief Valve Replace pressure relief valve.
INSUFFICIENT AIR
DELIVERY
Plugged Air Filter Replace.
Plugged Air/Fluid Separator Replace separator element and also change
compressor fluid and fluid filter at this time.
Defective Pressure Regulator Adjust or repair.
Engine Speed Too Low Readjust engine speed.
Control Air Cylinder Defective Replace cylinder.
EXCESSIVE COMPRES-
SOR FLUID CONSUMP-
TION
Leak in the Lubrication System Check all pipes, connections and
components.
Separator Element Damaged or Not
Functioning Properly
Change separator element.
Defective Minimum Pressure/
Check Valve
Repair or replace.
Fluid Sump Overfilled Drain to proper level.
COMPRESSOR OVER-
HEATING
Loose or Broken Fan Belt Tighten or change belt.
Dirty Fluid Cooler Core Clean core thoroughly.
Dirty Aftercooler Clean core thoroughly.
Dirty Radiator Core Clean core thoroughly.
Faulty Thermostat Element Change thermostat element.
Plugged Fluid Cooler Tube
(Internal)
Clean tube thoroughly.
Low Sump Fluid Level Fill.
Plugged Compressor Fluid Filter Change element.
ENGINE OVERHEATING Loose or Broken Fan Belt Tighten or change belt.
Dirty Radiator Core Clean thoroughly.
Dirty Fluid Cooler Clean thoroughly.
Low Water Level Refill.
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