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OM-261050 Page 37
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The air pressure gauge reads the air
compressor case pressure. Case
pressure can be high even when ex-
ternal reservoir pressure is zero. Al-
ways release pressure manually ac-
cording to Section 8-5 before check-
ing/adding oil or performing mainte-
nance.
1 Air Compressor Gauge (P − PG)
Adjust system maximum pressure and
minimum pressure using Remote Panel.
Set at lowest possible pressure for the job
to reduce engine loading.
Pressure is factory set for 120 psi.
Maximum pressure setting is 175 psi.
Minimum pressure setting is 120 psi.
See Section 10-3.
At pressures that are 10 psi above maxi-
mum set point, the compressor clutch will
temporarily disengage to prevent further
pressure build-up, and OVerPRES shows
temporarily on the remote panel display.
Once the compressor outlet pressure is re-
duced below the maximum set point, the
compressor controls reset and resume nor-
mal operation.
The compressor is also equipped with a
mechanical safety valve (P − SV) that will
open if pressure approaches 200 psi.
If the compressor continues to overpres-
sure and disengage, see Section 12.
If compressor shuts down due to over-
temperature, it automatically resets when it
cools.
8-4. Air Compressor Controls
1
265 802-A / 248 998
Adjust system maximum pressure and
minimum pressure using Remote Panel.