Change 1 2-1072.1
TM 9-2320-366-34-1
PRESSURE TEST
(1) Disconnect hose from fitting at output port
A of valve manifold.
(2) Install cap on output port A of valve
manifold.
(3) Install plug on output hose A.
(4) Start engine (TM 9-2320-366-10-1).
(5) Position PTO switch to on (TM 9-2320-
366-10-1)
(6) Increase engine RPM to 1250-1450
(TM 9-2320-366-10-1).
CAUTION
Hydraulic oil temperature must be 145°F-
155°F (63°C-68°C) prior to performing
troubleshooting checks. Failure to comply
may result in inaccurate test results.
NOTE
Holding DUMP BED UP/DOWN switch in
the down position will force hydraulic oil
through relief valve and cause oil temperature
to rise.
Measure hydraulic oil temperature near
bottom of hydraulic reservoir.
(12) Remove STE/ICE adapter, hose, and
reducer from swivel run tee.
(13) Disconnect hose P from swivel run tee.
(14) Remove swivel run tee from 90 degree
fitting at input port P of valve manifold.
(15) Connect hose to 90 degree fitting at input
port P of valve manifold.
(16) Remove plug from port A hose.
(17) Remove cap from output port A of valve
manifold.
(18) Connect hose to port A fitting of valve
manifold.
(7) Press and hold DUMP BED UP/DOWN
switch in the DOWN position until hydraulic
oil temperature reaches 145°F-155°F
(63°C-68°C).
(8) Perform STE/ICE Test #51 (TM 9-4910-
571-12&P)
(9) Hold DUMP BED UP/DOWN switch in
the UP position and observe pressure
reading of 2475-2525 psi (17065-17410
kPa). If pressure is low, adjust relief
valve clockwise. If pressure is high,
adjust relief valve counterclockwise.
If pressure cannot be adjusted, clean
or replace relief valve (para 17-3).
(10) Position PTO switch to off (TM 9-2320-
366-10-1).
(11) Shut down engine (TM 9-2320-366-
10-1).
