TM 9-2320-279-20-2
17-86
Change 4
Winches, Cranes, and Power Takeoff (PTO) Maintenance Instructions (Cont)
17-71.1.
CRANE HOOK, BLOCK, HOOK AND CLEVIS REMOVAL/REPAIR/
INSTALLATION (M984E1) (CONT).
c. Cleaning/Inspection.
WARNING
Adhesives, solvents, and sealing compound can burn easily, can give off harmful vapors, and
are harmful to skin and clothing. To avoid injury or death, keep away from open fire and
use in well-ventilated area. If adhesive, solvent, or sealing compound gets on skin or
clothing, wash immediately with soap and water.
(1)
Clean all metal parts with dry cleaning solvent.
(2)
Allow bearings to air dry, then coat with lubricating oil.
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective
chip guarding and personal protective equipment, goggles, shield and gloves.
(3)
Dry metal parts with compressed air.
(4)
Inspect metal parts for breaks, cracks, and sharp edges.
(5)
Inspect bushing diameter. Diameter must not exceed 2.010 in. (51.05 mm).
(6)
Inspect bearing for loose rollers or cracked and broken races.
(7)
Replace all damaged parts.
d. Assembly.
NOTE
·
Place legs of spring behind latch.
·
Perform steps (1 and 2) for Model A.
·
Perform steps (1) through (2.1) for
Model B.
(1)
Install spring (1) in latch (2).
(2)
Install latch (2) on hook (3) with
screw (4) and locknut (5).
(2.1) Push latch (2) to rear of hook (3) and
install cotter key (5.1) in hook (3).
NOTE
Curved side of bearing is installed facing
up. Be sure hook rotates freely.
(3)
Apply grease to bearing (6).
(4)
Install hook (3) in hook block (7)
with bearing (6), washer (8), nut (9),
and cotter pin (10).
