TM 5-3810-289-12
desired jib boom angle.
(b) Reeve upper jib boom point
support cable through the strut pulley. Secure the two
ends of the cable to the two deadend sockets on jib
boom point.
(c) Using proper length and size
cable, reeve the jib boom cable by securing one end of
righthand drum with the wedge. Reeve the cable
between the boom pendant cables and the lower jib
support cables, over the jib strut sheave, between the
upper jib support cables and then over the jib boom point
sheave.
(d) Secure weight hook to cable with
cable clamps.
2-4.
Equipment Conversions
The craneshovel is normally equipped as a lifting
crane, but front end attachments are available for
conversion to dragline, clamshell, backhoe and shovel
(figs. 2-8 and 2-9), and piledriver front end operating
units. Refer to paragraph 1-4 for description of front end
equipment. The following paragraphs provide detailed
instructions for converting the machine from a crane to
any of the attachments available for use. If the machine
is already equipped with other than a crane boom, refer
to the applicable paragraph for removal instructions, and
the applicable paragraph of the attachment being
installed for the installation instructions.
2-5.
Dragline Front End Conversion
Installation.
a.
(1) Operating levers. Refer to paragraph
2-3b (3) for correct operating lever linkage configuration.
ME 3810-289-12/2-6
and change operating pedal linkage, if not in correct
Figure 2-6. Forward brakeband.
configuration, as follows:
(a) Disconnect long reach rod (2) and
tension, jib strut, jib boom, and jib boom suspension
short reach rod (1) at brake pedal levers.
cables. Maximum length of boom to which a jib may be
(b) Remove levers (6) and (7) from
attached is 60 feet.
brake shafts (3) and (4) by loosening clamping bolts (8).
(c) Remove spacer (5) from front
(2) Installation.
drum brake shaft (4) and install on rear drum brake shaft
(a) Install crane boom (para 4-56)
(3).
and hook block (para 4-55).
(d) Install lever (6) on rear drum
(b) Secure jib strut to jib boom with
brake shaft (3). Install lever (7) on front drum brake shaft
pin and cotter pin as shown in figure 2-7.
(4).
(c) Position jib boom in the boom
(e) Tighten bolts (10).
point supports and secure with the two pins, cotter pins,
(f) Left pedal controls front drum
rod ends, lockwashers, and capscrews.
brake and right pedal controls rear drum brake.
(3) Cable reeving.
(a) Secure lower jib support in the
dead end socket in boom cable support; reeve it through
the jib strut pulley and secure to deadend socket on other
boom cable support. Position it in the proper hole to give
2-7
