IMT CAS3560, Operation, Maintenance And Spare Parts, Page: 54 / 77

52 IMT CAS3560 Air Compressor Manual Part No. 99903566
Compressor Troubleshooting
PROBLEM CAUSE RESOLUTION
Compressor does not make air. Air tank drain open.
ƒ Close tank drain valve.
Blow down valve stuck.
ƒ Remove blow-down valve, clean
out, reassemble.
PTO not engaged.
ƒ Engage PTO per instructions.
Compressor/truck shuts down. High air end temperature.
ƒ Check oil level. Add as required
per filling instructions. Do not
overfill. Wait for compressor to cool
down. Restart truck and
compressor. If truck shuts down
again, continue with
troubleshooting.
Fan not operating.
ƒ Insure that cooling fan is operating.
If not, check fuse in harness. See
speed control troubleshooting.
Air flow.
ƒ Insure that cooler has no airflow
obstructions.
ƒ Check air cooler core. Clean as
needed.
ƒ High ambient air temperature.
Contact IMT Technical Support.
Leaks.
ƒ Check for air leaking from tank or
blow down fittings.
Safety System Failure
ƒ Check high temperature shut down
circuitry for proper operation.
Oil flow restricted.
ƒ Check oil filter head for blockage.
ƒ Check for cold (< 0º F) oil.
Erratic speed. (Compressor
revs, slows, then dies.) Low oil.
ƒ Check oil, and add if needed.
Low system pressure. Air tank drain open.
ƒ Close tank drain valve.
Dirty air filter.
ƒ Check filter condition. Replace as
required.
Air leak.
ƒ Check air system fittings.
Pressure control valve stuck.
ƒ Remove, disassemble, clean.
Reassemble and install.
Inlet valve not fully open.
ƒ Inspect and repair. Check control
system operation.
System demands exceed
compressor delivery.
ƒ Reduce air demand and/or
consumption.