TM 9-2320-366-34-1
2-989
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.
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.
WARNING
CYLINDER DOWN INPUT FLOW TEST
(1) Place drain pan under vehicle.
(2) Disconnect hoses from ports (UP and DOWN)
on fold cylinder.
(3) Connect hydraulic tester:
(a) Connect two test hoses to pressure and
reservoir ports of hydraulic tester.
(b) Connect pressure test hose to fold cylinder
DOWN hose.
(c) Connect reservoir test hose to fold cylinder
UP hose.
(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) Position UNDERLIFT FOLD control valve handle
to DOWN.
(8) Perform flow test and note reading on hydraulic
tester.
(9) Perform pressure test and note reading on
hydraulic tester.
Drop hydraulic pressure to zero
before disconnecting any
hydraulic hose, tube, or fitting.
Failure to comply may result
in injury to personnel.
(10) If flow is below 3.5 gpm (13 lpm), or pressure
is below 1200 psi (8274 kPa), lower
valve assembly is faulty. Repair lower
valve assembly (para 16-84). If flow and
pressure are OK, fold cylinder is faulty. Replace
fold cylinder (para 16-71).
(11) Position PTO switch to off (TM
9-2320-366-10-1).
(12) Shut down engine (TM 9-2320-366-10-1).
(13) Disconnect pressure and reservoir test hoses
from fold cylinder hoses.
(14) Connect two hoses to ports (UP and DOWN) on
fold cylinder.
(15) Remove drain pan from under vehicle.
