SECTION 4 – BOOM
3120933 Rev. 0
USTC
4-17
inside of retract cable sheave holders to provide
clearance for cylinder.
9. Using an adequate lifting device, such as an
overhead crane, pull telescope cylinder approxi-
mately 6 in. Raise cylinder up and remove lower
cable retainer block.
CAUTION: WHEN USING SLING TO LIFT
CYLINDER, USE BLOCKS TO PREVENT
PINCHING AND DEFORMATION OF CABLE.
WHEN REPOSITIONING SLING, USE
BLOCKING TO PREVENT LAYING CYLINDER
ON CABLES.
10. Wire tie extend cable ends to cylinder and pull
cylinder and retract cables from boom assembly.
11. Set cylinder assembly on supports.
Installation
1. If not already done, attach hydraulic power
source to telescope cylinder ports and extend
cable approximately 2 ft. Position cylinder so
that cable retaining tabs are up.
Note: Mark both ends of the cables to ensure that
they do not cross inside of the boom.
2. Lay four extend cables though sheave holder
plates on telescope cylinder. Bullet ends should
lay down under cylinder and adjuster threads are
on top. Tabs provided on the cylinder are for
retaining the cables on top of cylinder. Number
both ends of each extend cable (1, 2, 3, 4) to
prevent crisscrossing cables after cylinder is
installed.
3. Install sheave and sheave pin in nose end (but
end) of cylinder. Each cable must be placed in
the appropriate sheave groove (1, 2, 3, 4). Se-
cure sheave pin with retaining ring. When in
place, insert cable retainer pin through sheave
pin tear drop and sheave plates. If new installa-
tion, weld bar stock on each side of tear drop to
prevent turning of sheave pin.
4. Install cylinder and retract cables inside boom
assembly. Be sure cylinder sheaves stay vertical
(no twisting) as cylinder is inserted into boom
assembly.
CAUTION: WHEN USING SLING TO LIFT
CYLINDER, USE BLOCKS TO PREVENT
PINCHING AND DEFORMATION OF CABLE.
WHEN REPOSITIONING SLING, USE
BLOCKING TO PREVENT LAYING CYLINDER
ON CABLES.
5. When telescope cylinder is approximately six
feet from being completely in boom assembly,
place lower retract cable retainer over cables
making sure cables are properly oriented (1, 2,
3, 4). Lower retract sheave pins must be flush to
allow clearance for the lower retract cable re-
tainer.
6. Align cylinder ears in grooves inside inner-mid
section. Cylinder must be positioned completely
into grooves to allow retainer blocks to be
placed. Secure retainer blocks with retainer
plates.
7. Secure each of the lower retract cable sheaves
with a cotter pin.
8. Attach cable anchor plate to base section and
insert adjuster ends of the four extend cables.
Use nylon lock nut and adjust cables according
to the cable adjustment procedure.
FLY SECTION
When cable inspection and replacement is necessary
the fly section can be removed without complete
disassembly of the boom. Removal of the fly section
provides access to the fly section extend cables and
sheaves for inspection or replacement.
Removal
1. Park truck in an open area with suitable clear-
ance. It is recommended that the boom is re-
moved from the truck to provide accessibility to
components. Refer to the boom removal proce-
dure earlier in this section.
If suitable lifting equipment is available, the fly
section may be removed with the boom installed
on the truck.
2. Remove the telescope cylinder. Refer to the
telescope cylinder removal procedure earlier in
this section.
Содержание 2500 jbt
Страница 16: ...SECTION 1 SPECIFICATIONS 1 8 USTC January 15 2001 Courtesy of Crane Market ...
Страница 22: ...SECTION 2 INSPECTION 2 6 USTC January 15 2001 Courtesy of Crane Market ...
Страница 62: ...SECTION 5 SWING DRIVE 5 10 USTC January 15 2001 Courtesy of Crane Market ...
Страница 74: ...SECTION 6 ELECTRICAL 6 12 USTC January 15 2001 Figure 6 11 Clam Shell 1282077 Rev A Courtesy of Crane Market ...
Страница 83: ...SECTION 7 HYDRAULICS 3120933 Rev 0 USTC 7 9 Figure 7 6 Control Valve Linkage Courtesy of Crane Market ...
Страница 91: ...SECTION 7 HYDRAULICS 3120933 Rev 0 USTC 7 17 Figure 7 15 Overload 1282330 Rev C Courtesy of Crane Market ...
Страница 95: ...SECTION 7 HYDRAULICS 3120933 Rev 0 USTC 7 21 Figure 7 19 Emergency Down 2792484 Rev Courtesy of Crane Market ...
Страница 98: ...SECTION 7 HYDRAULICS 7 24 USTC January 15 2001 Powered by TCPDF www tcpdf org Courtesy of Crane Market ...
