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National Crane
Published 5-27-2018 Control # 039-06
6-13
800D
REPAIR
20. Loosen and remove six capscrews attaching the bottom
pad plate to the second section. Slightly lift third section,
and remove pad plate.
21. Slide 3rd section out of 2nd section. Removal of side
pads is optional, as the side pads have adequate
clearance for boom disassembly. If removal of side pads
is required, tag all shims, pads and corresponding
locations for proper reassembly.
22. Loosen and remove all remaining capscrews and wear
pads from boom sections.
Boom Disassembly Alternative #2
The 800D boom design allows for removal of the telescope
cylinder from the rear of the boom without complete
disassembly of the boom sections. This procedure allows
quick access to the cylinder, retract cables, and various
internal boom components for service or replacement. If this
procedure is used for disassembly, reverse procedure for
reassembly, or locate the appropriate step in the assembly
procedure in this manual to start reassembly from.
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required
by local, state or federal regulations.
1. Remove hoist.
2. Gaining access through rear of boom, loosen and
remove capscrews retaining the extend cable anchor in
the rear of the 4th section. Loosen and remove two
capscrews retaining lock bar to telescope cylinder.
Remove lock bar
3. Loosen and remove the nuts which secure the extend
cables to the extend cable anchor in the back of the
second section, remove capscrews from keeper plates
holding extend anchor in place, remove keepers.
Remove anchor.
4. Drape extend cables and slide cable anchor plate out of
the side of the hoist mount.
5. Loosen and remove two capscrews, lockwashers and
spacers which anchor the telescope cylinder rod butt
plate to the rear of the 1st section.
6. Using appropriate lifting device, lift telescope cylinder up
and out of retaining slots on rear of 2nd and 3rd sections.
Retracting cylinder with an external hydraulic power
source during this step may be necessary.
7. Pull cylinder out through rear of boom assembly
approximately one-half the length of the cylinder.
Turning of the butt plate and rod 90 degrees may aid in
sliding cylinder through hoist mount area. Keep extend
cables tight to minimize the possibility of damage.
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 new wear pads with the cam plates and install
through the hoist mount end of the boom. Install
capscrews through holes in outer boom sections.
The wear pad 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
holes 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 1/2/3 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.
Fo
r
Reference
Only
Содержание National Crane 800D
Страница 1: ...Operator and Service Manual National Crane 800D F o r R e f e r e n c e O n l y ...
Страница 4: ...F o r R e f e r e n c e O n l y ...
Страница 98: ...MAINTENANCE 800D 3 10 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 194: ...SPECIFICATIONS 800D 8 4 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 216: ...INSTALLATION 800D 9 22 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 232: ...CRANE INSTALLATION 800D 10 16 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 252: ...SCHEMATICS 800D 2 Published 5 27 2018 Control 039 06 F o r R e f e r e n c e O n l y ...
Страница 255: ...F o r R e f e r e n c e O n l y ...
Страница 256: ...F o r R e f e r e n c e O n l y ...