PRESSURE TEST
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.
CAUTION
NOTE
PRESSURE TEST (CONT)
(16) Remove hose B from swivel run tee.
(17) Remove swivel run tee from port B of
valve manifold.
(18) Connect hose B to port B of valve manifold.
(1) Disconnect hose B from fitting at port B
of valve manifold.
(2) Install swivel run tee on fitting at
port B of valve manifold.
(3) Connect hydraulic hose B to swivel run tee.
(4) Connect reducer, hose, and STE/ICE adaptor
to swivel run tee.
(5) Start engine (TM 9-2320-366-10-1).
(6) Position PTO switch to on (TM 9-2320-
366-10-1).
(7) Increase engine RPM to 1250-1450
(TM 9-2320-366-10-1).
Change 1 2-1072.5
TM 9-2320-366-34-1
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.
(8) 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).
(9) Perform STE/ICE Test #51 (TM 9-4910-
571-12&P)
(10) Hold DUMP BED UP/DOWN switch in
the DOWN position and observe pressure
reading of 325-375 psi (2241-2586 kPa).
If pressure is low, adjust pressure reducing
valve clockwise. If pressure is high, adjust
pressure reducing valve counterclockwise.
If pressure cannot be adjusted, clean or
replace pressure reducing valve (para 17-3).
(11) Reduce engine RPM to idle (TM 9-2320-
366-10-1).
(12) Position PTO switch to off (TM 9-2320-
366-10-1).
(13) Shut down engine (TM 9-2320-366-
10-1).
(14) If pressure can be adjusted, but dump
bed still does not raise, replace hoist
cylinder (para 17-4).
(15) Remove STE/ICE adaptor, hose and
reducer from swivel run tee.
