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TM 5-5420-279-23
TSUM - 2-028 Lower Winch Function Check Part 4
Part 4
All Maintainer Tasks
Fit pressure
gauge to TPPA on
Launch Fram e
W inch Control
Manifold
Operate joystick
to pay out
P m ore than 1450 psi
P less than
(10000 kPa)
1450 psi
but less than
Does
(10000 kPa)
3191 psi (22000 kPa)
gauge
read
P = 3191 psi
(22000 kPa)
Replace 3191 psi
Replace both
(22000 kPa) relief valve cartridge
Fit pressure
SV13 and SV14 on Launch
on Lunch Fram e W inch Control
gauge to TPP on
Fram e W inch Control
Manifold. See m aintenance
W inch Control
Manifold. See m aintenance
procedure 5-132,
Manifold
procedure 5-122
item 4
Does
Carry out Pum p Function
gauge read 653 psi
Check. See hydraulic trouble
No
(4500 kPa) or
shooting chapter 2 procedure
m ore
2-030
Yes
Replace
proportional valve PV1. on
Launch Fram e W inch Control
Manifold. See m aintenance
procedure 5-122

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