TM 9-4940-568-34
3-78
3-21. MAST REPLACEMENT (Continued)
b.
Installation
WARNING
To
prevent
personal
injury,
extreme care must be taken to
properly handle heavy overhead
objects. Make sure all slings and
straps are safe to use and are
secured properly. Make sure
there are no obstacles in the way.
Keep clear of all suspended
loads.
(1) With help from assistant, attach lifting
device to mast (3) and install mast (3) on
turntable (22) with pivot shaft (21).
(2) Install rivet eyebolt (22) in pivot shaft
(21).
(3) Apply sealing compound to threads of
screw (17).
(4) Install bushing (19) and washer (18) in
rivet eyebolt (20) with screw (17).
(5) Tighten screw (17) to 135 lb-ft (183
N.m).
(6) Install erection cylinder (16) with pivot
shaft (15).
(7) Install rivet eyebolt (14) in pivot shaft
(15).
(8) Apply sealing compound to threads of
screw (11).
(9) Install bushing (13) and washer (12) in
rivet eyebolt (14) with screw (11).
(10) Tighten screw (11) to 135 lb-ft (183
N.m).
