SERVICE 1400H OPERATOR AND SERVICE MANUAL
5-20 Published 10-30-2014 Control # 040-09
FOUR SECTION BOOM SERVICE
Boom Removal
Boom Length Boom Weight CG from pivot point
14100H 11,475 lb (5205 kg) 160 in (406 cm)
1. Extend and set machine outriggers. Boom must be
completely retracted and stowed in the boom rest.
2. If equipped, remove swing around jib according to
procedures outlined in the “Safety & Operation” section.
3. Remove hook block or downhaul weight, wind up rope
on hoist drum and stow wedge socket on pegs provided
on 1st section. Shut down truck engine.
4. Attach a lifting device to rod end of lift cylinder, remove
boom lift cylinder pin keeper and pin from bottom of the
1st section boom. Lower lift cylinder to a suitable
support.
5. Tag and disconnect extend cylinder lines and hoist
hydraulic lines. Cap all open lines and ports. Unplug
anti-two-block/RCL cord from receptacle in turret.
6. Attach a lifting device to provide even weight distribution
and raise the boom until weight is removed from the
boom pivot pin. Remove boom pivot pin keeper and
boom pivot pin. Lift boom free of turret.
Boom Disassembly
For reference, the front of the boom refers to the sheave
case end, the rear of the boom is the hoist mount end. Left
and right are viewed from front to rear.
If the boom is to be unpinned from the turret of the crane
structure, please refer to the Four Section Boom Removal
Procedure section in this book. If the required service
procedure is to be performed on the boom while still pinned
to the turret, please follow these directions.
Do not, under any circumstances, work at an
elevated height without using proper fall protection as
required by local, state or federal regulations.
1. Extend and set all outriggers and SFO if equipped.
2. Fully retract the boom and place in a horizontal position.
3. Hoist removal optional.
Boom Disassembly
1. Gaining access through rear of boom, loosen capscrews
retaining the keeper plates holding the extend cable
anchor and retract cables in the rear of the 3rd section,
remove keeper plates.
2. Extend boom 24 in (60 cm). Loosen and remove the
nuts which secure the extend cables to the cable anchor
plate. Tag and disconnect hydraulic lines to the extend
cylinder.
3. Drape extend cables inside boom and slide cable
anchor plate out of the side of the hoist mount if hoist
has been removed from boom.
4. Loosen and remove two capscrews, lockwashers and
spacers which anchor the extend cylinder rod butt plate
to the rear of the 1st section.
5. Loosen and remove two capscrews and lockwashers
securing spacer bar to the inside top of the front of the
1st section. Remove spacer bar.
6. Loosen and remove four capscrews securing wear pads
to the bottom of the 1st section. Removal of side wear
pads is optional. Adequate clearance exists between
adjoining section side pads for boom disassembly. If
side pad removal is required, tag all pads, shims, and
corresponding locations for proper reassembly.
7. Support 2nd-3rd-4th assembly at the front with an
appropriate lifting method. Raise the 2nd-3rd-4th
assembly inside the 1st section to allow for front bottom
pad removal. Remove bottom wear pads.
8. With the 2nd-3rd-4th assembly supported, slide
assembly out of the 1st. Relocation of the sling point on
the 2nd-3rd-4th assembly will be necessary for proper
balancing of the assembly as it slides out of the 1st
section. Keep tension on retract cables as the assembly
is pulled out of the 1st to minimize the chance of retract
cable damage.
9. Place 2nd-3rd-4th assembly on a suitable horizontal
surface. Take care not to pinch or crush retract cables
while lifting or supporting assembly.
10. Remove top rear wear pads on the 2nd section. They
will lift off the cam plates easily. Do not remove or loosen
the capscrews holding the cam plates to the section.
This will affect side clearance during re-assembly.
11. Loosen and remove four capscrews securing the rear
bottom wear pads on the 2nd section. This pad serves
as a bottom and side pad as well as the retract cable
keeper under the retract sheaves. Removal of this pad
will allow the retract cables to uncoil off the retract
sheaves. Place retract cable ends in a location to
minimize the possibility of damage.
12. Loosen and remove six capscrews securing retract
sheave pin and retract sheaves to 2nd section. Remove
sheaves and pins.
13. Loosen and remove two capscrews functioning as upper
retract cable keepers. Remove retract cables.
14. Loosen and remove two capscrews securing lock bar to
the extend cylinder collar. This bar constrains the
vertical movement of the extend cylinder. Remove bar.
15. Loosen capscrews retaining extend cable anchor to
back of the 4th section. Total removal of the capscrews
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