20 - 1
FAULT
Compressor fails to build up
to working pressure
Compressor fails to off-load
(safety valve blowing)
Plant not operating at correct
minimum or maximum speed
Excessive compressor oil
consumption
Shut down due to high air
delivery temperature
Compressor drive will not
engage
POSSIBLE CAUSE
a Choked air intake filter
b Suction unloader valve stuck on seat
c Faulty blow down valve
d Faulty gauge
a Suction unloader valve stuck open
b Suction unloader/compressor joint
leak
c Punctured diaphragm on pressure
regulator or unloader piston
d Safety valve faulty
e Air/oil separator faulty
a Speed control faulty
b Engine fault
a Receiver scavenge oil restrictor
choked
b Air/oil separator faulty
c Incorrect grade of oil
a Machine not standing level or sited
badly
b Air receiver level low
c Incorrect grade of compressor oil
d Air/oil separator choked
e External surface of oil cooler clogged
f Clogging of compressor oil circulating
system
g Faulty temperature switch or circuit
a Parking brake not applied,
transmission not in neutral
b Power take-off solenoid fuse (A6)
blown
c Power take-off solenoid faulty
Section A Attachments
9803/7130
Section A
20 - 1
Issue 1
Airmaster Compressor
REMEDY
a Change air intake filter element
b Inspect and release valve through
unloader air intake
c Overhaul or change blow down valve
d Overhaul or change gauge
a Inspect and release valve through
unloader air intake
b Tighten or renew joint
c Inspect and renew
d Inspect and rectify
e Clean or change element
a Reset speed control
b Refer to engine Service Manual
a Clean oil restrictor
b Clean or change element
c Drain and refill with correct grade of oil
a Level machine or resite for maximum
air flow
b Top up air receiver oil
c Drain and refill with correct grade of oil
d Clean or change element
e Clean external surface of oil cooler
f Drain, flush and refill oil circulating
system
g Check circuit and/or change faulty
switch(es)
a Engage parking brake, put
transmission in neutral
b Change fuse
c Check circuit and change solenoid if
necessary
Fault Finding
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