TM 55-1730-229-12
TO 35C2-3-473-1
(x) Remove cap from SYSTEM
(m) Turn PRESSURE RELIEF valve
DRAIN
fitting.
counter
clockwise
until
gauge
pressure
drops
slightly
and
tighten lock nut.
(y) Open RESERVOIR DRAIN
(n) Set the PRESSURE switch to
valve, drain line, and collect a
DE-CREASE until the pressure gauge
mid stream fluid sample.
reads 2500 PSIG.
(z) Close
RESERVOIR
DRAIN
(o) Set the OUTPUT switch to
valve completely.
ON.
(aa) Reinstall and tighten
(p) Open BYPASS/FLUSH valve on
SYSTEM DRAIN fitting cap.
the dual service manifold until
pressure drops to 2000 PSIG.
(bb) Place samples into
sample mailer kit, NSN: 8125-01-
(q) Continue operations for 30
193-3440, and send to the unit's
minutes.
AOAP
laboratory
for
analysis.
The
data
gathered
from
these
(r) Close BYPASS/FLUSH valve on
samples
will
be
analyzed
to
dual manifold.
determine future inspections or
corrective action.
(s) Set OUTPUT switch to OFF.
2. If notified by the AOAP
(t) Set pressure switch to
laboratory
of
a
contaminated
DECREASE until pressure reads 500
hydraulic sample, conduct a second
PSIG.
sample using the above procedures.
(u) Set
POWER switch to OFF
3. Recurring samples may be taken
from the SYSTEM DRAIN fitting
(v) Set ENGINE CONTROL switch
without operating the AGPU.
to STOP to shut down AGPU.
(w) Complete shut down pro-
b. Flush Aircraft
Flight
procedures and immediately take a
Control System :
sample of the hydraulic fluid.
NOTE
(1)
The AGPU must have
been properly sampled and cleared
General
instructions
for operation. Ensure the reservoir
for
taking
proper
is full.
hydraulic
fluid
samples is contain in
TM
1-1500-204-23,
Volume 2, Pneudraulics
Maintenance
and
Procedures.
