Quantcast TSUM - 4-007 Jib Cylinder Does Not Retract (Part 2)

 

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TSUM - 4-007 Jib Cylinder Does Not Retract (Part 1)
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TM-5-5420-279-23 Dry Support Bridge (DSB) (NSN
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TSUM - 4-008 Jib Extension Cylinders Do Not Operate (Part 1)
TM 5-5420-279-23
TSUM - 4-007 Jib Cylinder Does Not Retract (Part 2)
Jib cyl does not
retract (part 2)
All Maintainer Tasks
Does
End of trouble
Yes
jib cyl
shooting
retract
No
Connect a hydraulic pressure
gauge to the pressure gauge
test point at the crane valve
control block
Is
Replace
the gauge reading
crane valve control block see
working pressure of 4496 psi
No
m aintenance procedure
(31000 kPa) when the jib cyl
6-069
controls are
operated
Yes
Replace jib cyl (retract) load
holding valve see
m aintenance procedure
6-078
Does
End of trouble
Yes
jib cyl
shooting
retract
No
Replace jib brake valve See
m aintenance procedure
6-077

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