Product Manual

Table Of Contents
6: Maintenance 185 T4F Kubota User Manual
02250216-781 R02
54 Subject to EAR, ECCN EAR99 and related export control restrictions.
Improper unloading
with an excessive
pressure build-up
causing the pressure
relief valve to open
Pressure regulating valve is set too
high
Readjust
Control system leak causing loss of
pressure signal
Check control lines
Defective pressure regulating valve. Repair
valve (kit available)
Inlet valve jammed Free or replace valve
Restriction in the control system
Check all control lines and components. Ice
and/or other contaminants could be the
cause
Defective pressure relief valve
opens when pressure is too low
Replace the pressure relief valve
Defective pressure regulator
Check the diaphragm and replace with kit if
necessary
Insufficient air delivery
Run/start switch not in run position
For compressors with idle warm-up con-
trols, switch toggle to RUN for full operation
Plugged air filter Replace
Defective idle warm-up control Replace control
Plugged air/fluid separator
Replace separator element and also
change compressor fluid and fluid filter
Defective pressure regulator Adjust or repair
Engine speed too low Readjust engine speed
Excessive compres-
sor fluid consumption
Clogged return line Clear orifice and return line strainer
Lubrication system leak
Check all pipes, connections and compo-
nents
Separator element damaged or
malfunctioning
Change separator element
Table 6-1: Troubleshooting guide
Symptom Probable cause Remedy