TM 5-3810-288-12
sheave bushings and sheaves as described under
f.
Boom Point Sheaves. Refer to figure 3-84
and remove and replace boom point sheaves. g. Jib
Strut. The jib strut is also called the jib boom mast.
Inspect for cracks or signs of damage, paying particular
attention to possible cracks at the welded joints of the
strut lacings. Report any sign of faulty welds or damage
to proper authority. Sheaves and sheave bushings must
be inspected for signs of wear or damage as described
in paragraph 3-58d and repaired or replaced as
necessary.
h.
Boom Backstops.
(1) Removal. Refer to paragraph 2-5 and
remove boom backstops.
(2) Repair. Refer to figure 3-85 and remove
inner telescoping members from the backstops. Inspect
springs for permanent set, cracks, or other damage, and
replace faulty springs. Clean all old lubricant from the
inner telescoping members and replace faulty pins.
Lubricate in accordance with the lubrication order before
returning the machine to service.
3-59. Backhoe Attachment
a. Removal and Installation.
Refer to
backhoe attachment.
b. Repair. Inspect cables and replace frayed
or damaged cables as instructed in paragraph 2-9.
Inspect sheaves and sheave bushings and replace faulty
sheaves or sheave bushings as instructed in paragraph
Figure 3-79. Dipper trip magnetic switch, removal and
replacement.
about one third of their original length. Inspect all parts
for wear, defects, or damage of any type, and repair or
worn or scored pins. Clean sheaves with a proper
replace any defective parts. Replace side cutters if they
solvent, removing all old lubricant. Inspect lubrication
are dull or broken.
fittings and make sure that passages are open and have
been receiving the lubricant.
3-60. Piledriver Attachment
Note. A properly grooved( sheave has smooth
Repair of the piledriver attachment consists of periodic
side walls and the groove is- only slightly wider than the
inspection for faulty welds, bent lacings, or other damage
cable. Use a light layer -of lubricant when reinstalling
to structural members. Any damaged item which affects
pins, bushings, and ]other fittings parts. Be "sure
structural strength must be reported to proper authority.
lubrication fittings are properly installed ant line up with
Lubricate the piledriver leads as described in the
grease holes.
lubrication order. Run the hammer up and down a few
(3) Replacement. Refer to paragraph 2-5 and
times while lubricating and apply more lubricant until
replace the upper spreader assembly.
hammer leads and guides are well lubricated. Keep the
piledriver structure clean, well painted to prevent
e. Clamshell and Dragline Buckets. When
corrosion, and machined surfaces free
teeth are worn to about one third of their original length,
drive out the attaching pins and replace dipper teeth.
Replace dump cable when it is frayed or worn. Replace
3-93
