Sullair 185Tier 3 Kubota User Manual page 52

5: Maintenance
Table 5-1: Troubleshooting guide—engine stops, does not crank, or cranks but does not start
Symptom
Compressor does not
achieve full discharge
pressure
Improper unloading with an
excessive pressure build-
up causing the pressure
relief valve to open
Insufficient air delivery
Excessive compressor
fluid consumption
Excessive foaming
48
Probable cause
Run/start switch not in run position
Air demand is excessive
Dirty air filter
Defective pressure regulator
Defective idle warm-up control
Pressure regulating valve is set too
high
Control system leak causing loss of
pressure signal
Inlet valve jammed
Restriction in the control system
Defective pressure relief valve
opens when pressure is too low
Defective pressure regulator
Run/start switch not in run position
Plugged air filter
Defective idle warm-up control
Plugged air/fluid separator
Defective pressure regulator
Engine speed too low
Clogged return line
Lubrication system leak
Separator element damaged or
malfunctioning
Fluid contamination
02250223-054 R01
Subject to EAR, ECCN EAR99 and related export control restrictions.
185 T3 Kubota User Manual
Remedy
For compressors with idle warm-up
controls, switch toggle to RUN for full
operation
Check service lines for leaks or open
valves
Check the filter and change the ele-
ment if required
Check the diaphragm and replace with
kit if necessary
Replace control
Readjust
Check control lines
Defective pressure regulating valve.
Repair valve (kit available)
Free or replace valve
Check all control lines and compo-
nents. Ice and/or other contaminants
could be the cause
Replace the pressure relief valve
Check the diaphragm and replace with
kit if necessary
For compressors with idle warm-up
controls, switch toggle to RUN for full
operation
Replace
Replace control
Replace separator element and also
change compressor fluid and fluid filter
Adjust or repair
Readjust engine speed
Clear orifice and return line strainer
Check all pipes, connections and com-
ponents
Change separator element
Change fluid (fluid flush procedure is
recommended). Confirm the compres-
sor is operating in correct temperature
range.