tachment is to be installed, remove crane boom (para 4-
shovel unit with proper boom installed into position at
cribbed pile leads, position installed hanger over boom
point sheave pin, position loose hanger over boom point
When crane, clamshell, or dragline
sheave pin, then secure it to lead with six bolts,
lockwashers, and nuts.
front end attachment is to be
installed, disregard step (3) above
and proceed as in step (4) below.
point sheave pin ends, install two split collars, and
secure each with bolt, lockwasher and nut.
and after referal to appropriate paragraph, install lagging
and cables (table 1-2) for the new front end attachment.
(1) Remove collar, cap, and hammer (para
When it is intended to store any
(2) Remove catwalk and adapters (para 0 4-
removed front end attachment for a
considerable period of time, all
(3) Position cribbing for foot of pile lead (fig.
components must be lubricated in
accordance with current lubricating
order (LO 5381020612), and protected
boom point is just above the horizontal, then build
cribbing to support top and center of pile leads (fig. 4-
during period of storage.
Be sure cribbing is high enough to
4-34. Pile Lead Hangers
keep boom point above the
(4) Use wedges or jacks to take weight off of
bolts from each hanger (fig.
hangers from pile lead.
b. Cleaning, Inspection and Repair.
(1) Clean all parts in an approved cleaning
work remaining hanger off boom point sheave pin, move
solvent and dry thoroughly.
crane shovel unit away; from leads, then reinstall
(2) Visually inspect hangers for cracks,
removed hanger on lead.
bends, or breaks, and mounting hardware for stripped
(6) Raise boom and move crane-shovel unit
threads, or other defects.
to area for boom removal, if required.
(3) Repair by straightening bends, welding
4-36. Hammer, Pile Cap, and Pile Collar
cracks or breaks, or replacement of defective part.
c. Installation. Position lead hangers on lead, then
(1) Raise pile leads above hammer, swing
4-35. Pile Leads
Figure 4-31. Pile leads, cribbed for removal or installation.