TM 9-2320-366-34-12-1083THREE-WAY CONTROL VALVE ASSEMBLY FLOW TEST(11) Position PTO switch to off (TM9-2320-366-10-1).(12) Shut down engine (TM 9-2320-366-10-1).(13) Disconnect hydraulic tester hoses and adapters.(14) Connect hose to port A.(15) Remove drain pan from under vehicle.(1) Place drain pan under vehicle.(2) Disconnect hose from right port (A) on topof left outrigger jack cylinder.(3) Connect hydraulic tester between hose andport A with test hoses and adapters.(4) Start engine (TM 9-2320-366-10-1).(5) Position PTO switch to on (TM9-2320-366-10-1).(6) Increase engine rpm to 1250-1450 rpm (TM9-2320-366-10-1).(7) Position MHC power switch to ON(TM 9-2320-366-10-1).(8) Lower left outrigger (TM 9-2320-366-10-1).(a) During lowering, observe reading of 3-4gpm (11-5 lpm) at negligible pressure.As outrigger loads, pressure will rise.(b) If flow is low, replace control valve inthree way (lower control) valve assembly.(9) Raise outrigger (TM 9-2320-366-10-1).(10) Position MHC power switch to OFF (TM9-2320-366-10-1).WARNINGWear approved eye protection when performing pressure checks. Failure to comply may result in oil getting into eyes. If oil contacts eyes, seekmedical attention immediately.Drop hydraulic pressure to zero beforedisconnecting any hydraulic hose, tube, or fitting.Failure to comply may result in injury to personnel.Fuel and oil are slippery and can cause falls. Wipe up spilled fuel or oil with rags. Failure to comply may result in injury to personnel.Check position of left outrigger to verify that it is heldin the stowed position. If left outrigger will not remainstowed over a period of time, holding valve (inoutrigger jack cylinder) is faulty.
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