TM 9-2320-366-34-1
2-1003
CONTROL VALVE FLOW TEST
WARNING
Wear approved eye protection when
performing pressure checks. Failure
to comply may result in oil getting
into eyes. If oil contacts eyes, seek
medical attention immediately.
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.
NOTE
Tag hydraulic hoses, tubes, and
fittings prior to disconnecting.
(1) Place drain pan under vehicle.
(2) Disconnect underlift hose from tube at back
end of hydraulic rack.
(3) Connect hydraulic tester between hose and
tube with test hoses and adapters.
(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 RPM (TM
9-2320-366-10-1).
(7) Operate UNDERLIFT UP (TM 9-2320-366-10-1).
(8) Check for reading of 12-14 gpm (45.24-52.78
lpm) at 2400-2600 psi (16548-18927 kPa).
(a) If flow reading is less than 12gpm, control
valve in lower main valve assembly is faulty.
(b) If pressure reading is more than 2600 psi,
2600 psi relief valve in lower main valve
assembly is faulty. Replace 2600 psi relief
valve.
(9) Position PTO switch to OFF (TM
9-2320-366-10-1).
(10) Shut down engine (TM 9-2320-336-10-1).
(11) Disconnect hydraulic tester, test hoses and
adapter, hose to tube.
(12) Connect hose to underlift tube at end of
hydraulic rack.
Drop hydraulic pressure to zero
before disconnecting any
hydraulic hose, tube, or
fitting. Failure to comply may
result in injury to personnel.