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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
steering control pump port L fitting.
(2)
Connect a 0 to 4,000 psi (0-27,567
kPa) pressure gauge to steering
control pump port L fitting.
(3)
Install pressure plug in L port hose.
(4)
Start engine (TM 10-3930-669-10).
(5)
With the aid of an assistant, turn
steering wheel fully to the left and
observe pressure gauge.
(a)
If 2,000 to 2,600 psi (13,780-
17,920
kPa)
are
not
measured, perform Steps (6)
and (7) below and replace
steering control pump (Para
13-4).
(b)
If 2,000 to 2,600 psi (13,780-
17,920 kPa) are measured,
steering control pump is OK.
(6)
Shut down engine.
(7)
Remove pressure gauge, tag, and
plug and connect hose to steering
control pump port L fitting.
PRESSURE TEST
(1)
Tag and disconnect hose from
priority valve port CF fitting.
(2)
Connect a 0 to 4,000 psi (0-27,567
kPa) pressure gauge to priority
valve port CF fitting.
(3)
Install pressure plug in valve hose.
(4)
Start engine (TM 10-3930-669-10).
(5)
With the aid of an assistant, turn
steering wheel fully to the right and
observe pressure gauge.
(a)
If 2,000 to 2,600 psi (13,780-
17,920 kPa) are not measured,
perform Steps (6) and (7)
below
and
replace
priority
valve (Para 17-11). Go to
Step 5 of this Fault.
(b)
If 2,000 to 2,600 psi (13,780-
17,920 kPa) are measured,
priority valve is OK.
(6)
Shut down engine.
(7)
Remove pressure gauge, tag, and
plug and connect hose to priority
valve port CF fitting.
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