NOTE
LOWER MAIN VALVE ASSEMBLY
PRESSURE TEST
TM 9-2320-366-34-1
Change 1 2-1006.3
(1) Place drain pan under vehicle.
(2) Disconnect hose from rear fitting of
lower main valve.
(3) Install plug in hose.
(4) Install swivel run tee on rear fitting.
(5) Install cap and reducer on swivel run tee.
(6) Connect hose, 10,000 PSI transducer, and
STE/ICE-R to reducer.
(7) Start engine (TM 9-2320-366-10-1).
(8) Position PTO switch to on
(TM 9-2320-366-10-1).
(9) Set engine speed by increasing HAND
THROTTLE lever until tachometer reads
1,250-1,450 RPM.
(10) Position STATION SELECTOR switch to
WRECKER CONTROL PANEL.
(11) Perform STE/ICE-R test #51
(TM 9-4910-571-12&P).
(12) Position MAIN WINCH LH lever to IN and
note reading hydraulic tester.
(13) If pressure is not between 2,950-3,050
PSI (20,340-21,030 kPa), repair or replace
lower main valve assembly (para 16-84).
(14) Position PTO switch to off
(TM 9-2320-366-10-1).
In the event of a tachometer failure a HAND
THROTTLE lever positioned to L is
approximately 1,250-1,450 RPM.
(15) Shut down engine (TM 9-2320-366-10-1).
(16) Disconnect STE/ICE-R, 10,000 transducer,
and test hose, from reducer.
(17) Remove reducer and cap from swivel run tee.
(18) Remove swivel run tee from rear fitting of
lower main valve.
(19) Remove plug from hose.
(20) Connect hose to lower main valve fitting.
(21) Remove drain pan.
