TM 5-3810-231-12
Section IV. OPERATOR'S MAINTENANCE
desired. The allowable boom length and jib length to be
37. General
used is specified on the Rating Plate furnished with the
machine. Always consult the Rating Plate when using a
The instructions in this section are published for
long boom or making a heavy sift. Information on this
the information and guidance of the operator to maintain
Rating Plate is listed by the boom length and operating
the Model 1125, 60 ton Crawler Crate.
radius is measured from the center of rotation of the
machine to the center of the hook. Lifting capacity is
38. Fuel Filter Service
also affected by the number of parts of line used to
reeve the main hoist block. Lifting capacities for each
Service the fuel filter as illustrated in figure 19.
reeving of the hook block are shown on the Rating
Plate.
39. V-Belt Adjustments
Adjust the V-belts as illustrated in figure 20.
40. Light or Lamp Replacement
Remove and install light or lamp as illustrated in
41. Counterweight, Removal, and Installation
a. Removal. Position machine with the front of the
upper over the front of the lower (propel chains are in
the rear of the lower) so that' the counterweight will clear
the crawler tracks when lowered.
(1) Lower gantry assembly (para 18).
(2) Raise spreader bar and block up. Reeve
wire rope (3/4 inch x 110 feet) as
illustrated in figure 22.)
(3) Take up tension on cable and remove
pins holding counterweight and lower
counterweight to the ground be sure to
keep it level so the sheaves on gantry and
Figure 19. Fuel filter service.
counterweight will operate properly.
b. Installation. Reverse the procedure described
b. Crane Boom Installation.
for removal.
(1) Using suitable lifting device, lift the boom
into position, aligning the holes of the
42. Boom Assembly, Removal and Installation
boom base section, with the holes in the
rotating upper section and install boom
a. General. All crane booms and jibs are adjusted
foot pins as shown in figure 24.
for length by use of inserts between the point section
(2) Install boom backstop to boom and gantry
and base section (fig. 23). The lengths of these inserts
vary depending upon the length of the boom or jib
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