OM-261050 Page 38
For compressor blow down to
automatically function, the En-
Pak engine must be running.
! Before maintaining com-
pressor, manually release
compressor case pressure.
To control the release of air in the
compressor, the compressor goes
through a blow down cycle. Blow
down depressurizes the com-
pressor case when not compress-
ing air; this provides safe release of
case pressure and allows reduced
load at restart. Blow down also oc-
curs when the compressor is run-
ning but air is not required.
In ambient temperatures below
freezing, compressor unload and
blow down time is extended to build
up heat in the compressor. This
helps increase oil temperature and
remove moisture from the com-
pressor oil.
1 Pressure Release Valve
2 Air Compressor Gauge
(P−PG)
! Do not open oil fill cap until
compressor case pressure
has been released. Do not
open while running.
Use the pressure release valve to
relieve case pressure even if the
compressor case pressure is
close to zero (0) psi. Open valve
by turning counterclockwise. You
may hear the pressure relieve,
however, always check the pres-
sure gauge to ensure all pressure
has been relieved.
1
8-5. Compressor Blow Down
2
265 804-A
Notes
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