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TM 10-3930-669-20
WARNING
·
High-pressure hydraulics (oil under 3,000 psi (20.700 kPa) pressure] operate this
equipment. Refer to vehicle operator and maintenance manuals for hydraulic oil
pressure. Never disconnect any hydraulic line or fitting without first dropping pressure
to zero. Failure to comply may result in injury to personnel.
·
Hydraulic oil is slippery and can cause falls. To avoid injury. wipe up spilled oil with
rags.
PRESSURE TEST
(1)
Tag and disconnect hose from secondary
flow regulator fitting.
(2)
Connect a 0 to 4,000 psi (0-27,567 kPa)
pressure
gauge
to
secondary
flow
regulator hose.
(3)
Install pressure cap on regulator open port
fitting.
(4)
Start engine (TM 10-3930-669-10).
(5)
With aid of an assistant, move tilt/ lift
joystick to raise position and observe
pressure gauge (TM 10-3930-669-10).
(a)
If 2,000 to 2,600 psi (13,780-17,920
kPa) are not measured, stack valve is
faulty. Perform Steps (6) and (7)
below and notify DS Maintenance.
(b)
If 2,000 to 2,600 psi (13.780-17,920
kPa) are measured, stack valve is
OK.
(6)
Shut down engine.
(7)
Remove pressure gauge, tag, and cap and
connect hose to secondary flow regulator
fitting.
PRESSURE TEST
(1)
Tag and disconnect hose from right
secondary lift cylinder fitting.
(2)
Connect a 0 to 4,000 psi (0-27,567 kPa)
pressure gauge to right secondary lift
cylinder hose.
(3)
Install pressure cap on lift cylinder open
port fitting.
(4)
Start engine (TM 10-3930-669-10).
(5)
With aid of an assistant, move tilt/ lift
joystick to raise position and observe
pressure gauge (TM 10-3930-669-10).
(a)
If 2,000 to 2,600 psi (13,780-17,920
kPa) are not measured, perform
Steps (6) and (7) below. Repeat
procedure and notify Supervisor.
(b)
If 2,000 to 2,600 psi (13,780-17,920
kPa) are measured, secondary flow
regulator is OK.
(6)
Shut down engine.
(7)
Remove pressure gauge, tag, and cap and
connect hose to right secondary lift
cylinder fitting.
(8)
Install cab floor plate (Para 15-12).
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