TM 5-3810-307-24-1-1
MAINTENANCE
7.
Block the lift cylinder.
REMOVAL.
8.
Remove the bolts, washers, and retaining plate
NOTE
securing the upper lift cylinder shaft to the attach
The boom may be disassembled with the
fitting.
base section left on the crane if repair of
the base section is not necessary.
9.
Remove the upper lift cylinder shaft.
10. Activate the hydraulic system and withdraw the
NOTE
lift cylinder rod enough to clear the attach fitting.
The boom weighs approximately 7,078
lbs (3,211 kg).
WARNING
1.
Extend and set the outriggers and ensure the
Shut down the crane before proceeding.
boom is fully retracted and in a horizontal position
over the front of the crane.
11.
Take up the slack on the boom lifting device.
12. Remove the clip pin, plate, and retaining pin
WARNING
securing the boom pivot shaft. Remove the boom
pivot shaft.
Wear gloves when handling wire rope.
13. Raise the boom clear of the crane and lower to
2.
Remove the hook block and wind all the wire
ground level for service.
rope onto the hoist drum.
DISASSEMBLY.
3.
Elevate the boom slightly to allow for
withdrawal of the lift cylinder rod end from the lift
NOTE
cylinder attach fitting.
Steps 1 through 4 apply to a boom that is
WARNING
to be disassembled with the base
section left on the crane.
Ensure all blocking and lifting devices
are capable of supporting boom
1.
Extend and set the outriggers.
assembly.
2.
Place the boom in a horizontal position.
4.
Attach a lifting device to provide equal weight
distribution and place the boom safety block in
3.
Completely retract the boom.
position. Rest the boom on the safety block.
4.
Tag and disconnect the hydraulic lines to the
5.
Disconnect any electrical wiring from the
telescope cylinder. Remove the telescope cylinder
boom.
holding valve. Cap all lines and openings.
6.
Tag and disconnect the hydraulic lines to the
telescope cylinder. Cap the lines and openings.
WARNING
Ensure the boom lift cylinder is properly
supported before disconnecting it from
the boom.
2-10-6
