d. Inspect threads on hook (15) and nut (12).Replace
pulleys and spacers (61 onto pin (5) as shown on figure
if threads are damaged.
e. Replace bearings (9) and (13) if damage or
c. Position the assembled hook, pulleys and guard
excessive wear is seen upon inspection.
(8) between plates (17).Install pin (3), retainer (4) and
f. Inspect all other parts for wear, defects or other
cotter pins (2).Replace lubrication fittings (1).
damage. Replace as necessary.
d. Rotate pulleys to insure bearings (9) rotate freely.
Insure that hook swings freely.
a. Install hook (15) into trunnion (16).Replace bearing
(13), install nut (12) and tighten setscrew (11). & Install
Lubricate and install hook block assembly as described
bearings (9) into pulleys (10). Position
in TM 5-3810-295-12.
Section IV. REPAIR OF BOOM, BOOM ROLLERS AND PULLEYS
Specification P-D-680 or equivalent, and wipe dry. Make
sure to remove all old lubricant.
a. The boom (fig.10-5) is in two sections, secured
together by eight cap screws, lock washers, and nuts.
Boom Repair is limited to component parts
Rollers and pulleys are mounted on the upper section
replacement only. Main cord angles shall not be
(40) of the boom.
repaired or straightened below the depot
maintenance level. Lacing members may be cold
load cable movement. Rollers (36) are used for guiding
straightened at direct support level. Cutting and
the cable and also reducing cable friction.
welding of lacing and cord angles is not permitted
below depot level.
b. Inspect pulleys and rollers for excessive wear or
10-17. Removal and Disassembly
damage. Inspect bearings (31) and (42) for excessive
a Remove the boom assembly as described in TM 5-
wear or damage. Inspect all other parts for excessive
wear or damage. Inspect boom and boom welds for
b. Insure that the boom is adequately supported.
cracks using magnet particle (magnaflux) method.
Refer to figure 10-5 and disassemble the boom as
c. Corrugated grooves may be smoothed on a lathe if
damage is not extensive.
10-18. Cleaning, Inspection and Repair
a. Clean boom parts with cleaning solvent, Federal
Change 1 10-6