SECTION 4 – BOOM
4-10
USTC
January 15, 2001
4. Adjust fly retract cables (outer-mid) to retract
fly section and remove all slack from cables.
5. Adjust fly extend cables to remove all slack.
6. Continue to adjust extend and retract cables to
obtain a dimension of approximately 6-1/2 in.
from the front edge of the outer-mid section to
the center of the boom nose upper sheave and to
maintain the grease hole alignment.
7. Using all applicable safety precautions, start
crane and cycle boom (extend at least three
feet). Listen for any cables hitting the inside of a
boom section which indicates slack in cables.
8. If the cables are hitting readjust as necessary to
maintain conditions until cables do not hit, as
established in step above.
9. Repeat steps 7 and 8 as necessary. Extend cable
nylon collar adjusting nuts should be torqued to
30 lb-ft. (40.6 Nm) (dry).
10. Install boom stop and shim as necessary so stop
is snug against outer-mid section top plate when
boom is fully retracted.
11. Check for proper operation of boom.
12. Operate hoist and carefully remove slack in
cable, be sure cable is in direct line with cable
socket attached to lug on end of base boom.
13. Carefully operate hoist to pivot and raise hoist
until mounting plate holes line up with holes in
base boom side plates.
14. Install the 3/4"-10UNC x 3-1/2" long, grade 8
bolts, washers, spacers and nuts. Torque to 301
lb-ft. (408 Nm) using Loctite 262.
15. Remove open wedge cable socket from base
boom lug and reeve cable for the configuration
required, i.e. one part line, two part line, etc.
Refer to reeving instructions earlier in this
manual.
16. Reinstall hoist.
Extend/Retract Cable Replacement
When the extend cables require replacement and the
boom is not scheduled to be completely disassembled,
it is possible to attach a wire to one end of the old
cable before pulling the cable out. Once the old cable
is removed, the new cable can be attached to the wire
and threaded through.
To replace the retract cables, the telescope cylinder
and fly section must be removed.
To remove the telescope cylinder and fly section,
refer to the procedures later in this section.
BOOM ASSEMBLY
When disassembly of the boom is required it should
be removed from the truck for easier access to the
sections. A crane is required to handle the various
sections. Refer to the specifications section for the
weight of the boom and components.
Boom Removal
1. Park the truck in an open area. Set the park
brake.
2. If boom is equipped with a jib, remove pins and
detach jib assembly from boom assembly using
suitable lifting equipment.
3. Remove pin attaching hoist cable wedge socket
to headache ball/hookblock.
4. Remove cable retainer pins on forward side of
boom nose.
5. Using all applicable safety precautions operate
hoist to wind all cable onto hoist drum and
retract boom fully.
6. Shut down crane systems and turn off truck
engine. With ignition on and PTO engaged,
cycle all boom functions to relieve any pressure.
Turn off truck ignition and disengage PTO.
7. Using suitable lifting equipment, adequately
support boom weight along entire length of
retracted boom.
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 ...
