9
Symptom:
Engine stalls when compressor starts
Check and correct the following:
a) Engine fuel filter or air filter plugged - replace
b) Fuel pump functioning
c) Air compressor is under pressure
– allow to unload
d) Operating speed is too low
– adjust as required (1800 rpm)
e) Blow down valve operating properly
f) Compressor switched on, building pressure (should be off to start)
g) Positive air shut off valve tripping (optional
– not on all units)
Symptom:
Low air pressure
Check and correct the following:
a) Air flow capacity exceeded
– reduce load demand on compressor
b) Engine speed too low
– adjust as required
c) Pressure regulator/switch not operating properly
– adjust or replace as required
d) Restricted flow - kinked or collapsed air line, ice blockage.
Symptom:
Excessive oil in the air produced
Check and correct the following:
a) Check compressor oil level
– ensure correct level
b) Check oil scavenging line is clear
– clear and inspect
c) Check coalescing filter
– replace as required
Symptom:
Diesel engine turns but will not start
Check and correct the following
a) Adequate fuel supply
b) Glow plugs - test
c) Compressor switch on/turn off
d) Fuel filter restricted/valve off
– bleed air from filter housing
e) Positive air shut off valve tripped (optional
– not on all units)
f) Fuel pump operation
– check flow
g) Compressor not unloading, producing air while cranking
h) Bleed air from fuel filter through screw at top of filter.
