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Page Title:
TSUM - 4-007 Jib Cylinder Does Not Retract (Part 1) |
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 TM 5-5420-279-23
Jib cyl
does not retract
(part 1)
Prepare for crane
operations in accordance
Is
with the operator's
No
PTO engaged
m anual
TM 5-5420-279-10
Yes
Is
Set the flow
the directional
control valve in
flow control valve in the
No
the correct
correct position for crane
position
operation
Yes
Does
End of trouble
lift cyl
Yes
shooting
retract
No
Operator tasks
Operate
emergency
shut-off valve
Maintainer Tasks
Electrical fault.
Carry out electrical
Does
trouble shooting on the
jib cyl
Yes
crane lift cyl circuits.
retract
See TSUM 4-011
No
Carry out electrical
check on valve control
block solenoid dum p
valve see m aintenance
procedure 6-075
Go to
part 2
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