Oshkosh Corporation IMT CAS80R, Installation, Operation, Maintenance & Parts Manual

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CAS80R SECTION 6: TROUBLESHOOTING
PAGE - 30 Manual # 99905932 (February 2016)
®
IOWA MOLD TOOLING CO., INC.
(641) 923-3711 • www.imt.com
6.2 TROUBLESHOOTING GUIDE
MALFUNCTION/FAULT POSSIBLE CAUSE CORRECTIVE ACTION
Compressor shuts down
air with demand present
Compressor discharge
temperature switch is open
Cooling air flow is insufficient; clean
cooler and check for proper ventilation.
Low fluid sump level; add fluid.
Fan not operating. Check ground and
fan switch.
Plugged oil filter Replace oil filter.
Dirty cooler core exterior Clean cooler core.
Contaminated cooler core Remove and clean cooler core.
Hydraulic pressure and flow
incorrect Adjust and reset.
Compressor will not build
up pressure
Air demand is too great Check service lines for leaks or open
valves. Too much air demand.
Dirty air filter Check the filter and clean or change
element if required.
Pressure regulator out of
adjustment DO NOT ATTEMPT TO ADJUST.
Contact the IMT Service Department
for assistance.
Defective pressure regulator Replace pressure regulator.
Motor does not speed up Check hydraulic flow and pressure and
adjust if necessary.
Service valve wide open Close service valve.
Inlet stuck shut Check oil level
Compressor over pres-
sures
Pressure regulator out of
adjustment Contact factory service department.
Defective pressure regulator Replace pressure regulator; Contact
factory service department.
Leak in air control line Check line and correct.
Inlet valve stuck open Free or replace valve.
Restriction in control line Dirt or ice present. Clean or free up.
Defective safety valve Replace safety valve.
Plugged coalescer (air/oil
separator) Replace coalescer.
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