SERVICE 1400H OPERATOR AND SERVICE MANUAL
5-22 Published 10-30-2014 Control # 040-09
FOUR SECTION BOOM ASSEMBLY
Note: Do not use Loctite on any cable threaded
ends. Always use the locknut and nut provided.
When initially assembling threaded ends of cables,
thread the first on past the flat in the cables so adjustment
can be made later.
1. Assemble sheaves into 4th section sheave case. Top
sheave is to be installed to the left hand side of the boom
with the spacer to the right hand side.
2. Attach rear wear pads on bottom of 4th section. Using
Loctite 243 blue, Loctite all wear pad mounting
capscrews.
3. Install 4th section boom into 3rd section. Slide together
approximately 5 ft (150 cm).
4. Assemble bottom front wear pads for 3rd section and
Teflon plugs. Attach pads to pad plate.
5. Using appropriate lifting device, lift 4th section to allow
for wear pad/pad plate installation in front of 3rd. Install
wear pad/pad plate assembly. Slide sections together
within 12 in (30 cm) of full retraction.
6. Install cable guide and upper spacer to front of 3rd
section
7. Install front side wear pads with appropriate shims,
between 4th and 3rd sections. If boom has been
disassembled, and no sections have been replaced, use
same shim quantity and location as was previously
used. If locations are in question, refer to shim
calibration section in this book. Slide boom sections
completely together.
8. Assemble top rear wear pads to the top of the 4th boom
section with the cam plates and install through the hoist
mount end of the boom. Install capscrew through holes
in outer boom sections.
The wear pads on each side at the top/rear of the boom
can be adjusted over a range of 3/16 in (4,8 mm) by
rotating, end for end, the wear pad and plate or the wear
pads and plate independently. This is possible because
the holes in these parts are offset from the center. The
hole are 0.06 in (1,5 mm) off center in the plate and 0.03
in (0,8 mm) off center in the wear pad. Various
combinations of rotation of these parts allow the
adjustment.
9. Uncoil 4/3/2 retract cable assemblies, and insert button
end into anchors in back of the 4th section. Place
uncoiled cable in area that will minimize the potential for
damage.
10. Uncoil 3/2/1 retract cable assemblies, and insert button
end into cable anchor pockets in back of the 3rd section.
Place uncoiled cable in area that will minimize the
potential for damage. Assemble retract sheaves and
retract sheave pins in rear of 3rd section. Coat surfaces
of bearings and keeper plates with grease before
assembly.
11. Place retract cables anchored to 4th over the top of the
retract sheaves on the 3rd. Install keeper capscrew
above sheave to hold retract cables in place.
12. Reeve cables over retract sheave and install keeper/
wear pad to bottom rear of 3rd section. This pad acts as
a side pad, bottom pad, and a cable retainer. Loctite rear
wear pad hardware on bottom of 3rd section with Loctite
243 blue. Loctite all wear pad mounting capscrews.
13. Loop the 1/2/3 extend cable in half and place it on the
top of the 3rd section, with the loop end towards the
sheave case end and the threaded and button end
towards the rear of the section.
14. Install clamp plate and capscrews with the button end of
the cable installed in the anchor slot on the rear top of
the 3rd section.
15. Place sheave pin and sheave for the 1/2/3 extend cable
in position on the sheave case end of the boom, inside
the loop of cable
16. Install 3rd and 4th section boom assembly into 2nd
section. Slide together approximately 5 ft (150 cm). Use
caution as retract cables and upper extend cable
attached to the 4th-3rd section assembly slide into the
2nd section to prevent damage or crossing of cables.
17. Assemble bottom front wear pads for 2nd section and
Teflon plugs. Attach pads to pad plate.
18. Using appropriate lifting device, lift 3rd and 4th section
assembly to allow for wear pad/pad plate installation in
front of 2nd. Install wear pad/pad plate assembly. Slide
sections together within 12 in (30 cm) of full retraction.
19. Install cable guide and spacer to top of 2nd section
20. Install front side wear pads with appropriate shims
between 3rd and 2nd sections. If boom has been
disassembled, and no sections have been replaced, use
same shim quantity and location as was previously
used. If locations are in question, refer to shim
calibration section in this book. Slide sections fully
together
21. Assemble top rear wear pads to the top of the 3rd boom
section with the cam plates and install through the hoist
mount end of the boom. Install capscrew through holes
in outer boom sections.
The wear pads on each side at the top/rear of the boom
can be adjusted over a range of 3/16
in (4,8 mm) by
rot
ating, end for end, the wear pad and plate or the wear
pads and plate independently. This is possible because
the holes in these parts are offset from the center. The
hole are 0.06 in (1,5 mm) off center in the plate and 0.03
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