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TM 5-5420-279-23
TSUM - 2-026 A-Frame Rotate (Park) (119) Part 3
Part 3
All Maintainer Tasks
Is
Greater than
Zero
pressure gauge
2900 psi (20000 kPa)
reading
Carry out Pum p
Check A-Fram e pivots
Function Check.
and operating
Less than
See hydraulic
cylinders for evidence
2900 psi (20000 kPa)
trouble shooting
of m echanical
chapter 2
jam m ing or seizure
procedure 2-030
Replace SV19 valve stack
Support one cylinder and
Does
assem bly on A-Fram e Rotate
disconnect cylinder rod end
pum p function
Manifold. See trouble shooting
from A-Fram e. Operate
correctly
chapter 2 procedure 2-031 &
A-Fram e Rotate Park button.
m aintenance procedure 5-120
No
Yes
Check that cylinder extends
sm oothly. Retract cylinder
with A-Fram e Rotate Deploy
button and reconnect cylinder
Replace pum p
Replace SV19
assem bly or use cross
Valve Stack assem bly on
vehicle connection. See
A-Fram e Rotate Manifold.
m aintenance procedure
See m aintenance
Repeat procedure
6-043
procedure 5-120
with other cylinder
Replace faulty
Do
cylinder assem bly.
both cylinders
No
See m aintenance
operate
procedure 5-077
sm oothly
Yes
Check A-Fram e
m echanically for
evidence of jam m ing or
seizure. See -10
chapter 9
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