TM-55-2320-279-14
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TRANSPORTABILITY GUIDANCE
TM-55-2320-279-14 - Page 18 of 46
TM 55-2320-279-1 4
exceed 20,000 pounds. When individual axle
weights exceed 10,000 pounds, axles shall be
placed in compartments I through M (columns 20
through 36). Maximum rear tandem axle weight
shall not exceed 32,000 pounds for the M977,
M978, and M983 and 38,000 pounds for the
M984E1 and M985. Maximum forward tandem
axle weight must not exceed 30,000 pounds.
NOTE
The M985E1 (modified M985 with H1AB
8108 crane and extended frame) has not
been certified for transport aboard C-141
aircraft.
j.
For C-5 transport, the gross vehicle weight
must not exceed 62,000 pounds for the M977,
M978, and M983 and 68,000 pounds for the
M984E1 and M985. Maximum rear tandem axle
weight must not exceed 32,000 pounds for the
M977, M978, and M983 and 38,000 pounds for the
M984E1 and M985. Maximum forward tandem
axle weight must not exceed 30,000 pounds.
k.
All four shackles must be installed (one in
each forward and aft tiedown provision). If a
shackle is missing, a screw pin anchor shackle
with a pin size of 1.5-inch diameter (NSN 4030-00-
169-9297 or equivalent) must be installed.
4-6. Transport by US Air Force Aircraft
a.
All HEMTTs require the same amount of
ramp and approach lumber shoring for loading
into or unloading from the C–130. The ramp sup-
port shoring is 20 by 11 by 10 inches thick. The ap-
proach shoring consists of:
(1) Four pieces, 1.5- by 11.5-inch by 5-foot.
(2) Four pieces, 1.5- by 11.5-inch by 4-foot.
(3) Four pieces, 1.5- by 11.5-inch by 2-foot.
b.
All HEMTT vehicles require the same amount
of ramp and approach lumber shoring for loading
into or unloading from the C–141 aircraft. The
ramp shoring is 20 by 11 by 10.5 inches thick. The
approach shoring consists of:
(1) Four pieces, 1.5- by 11.5-inch by 8-foot.
(2) Four pieces, 1.5- by 11.5-inch by 7-foot.
(3) Four pieces, 1.5- by 11.5-inch by 6-foot.
(4) Four pieces, 1.5- by 11.5-inch by 5-foot.
(5) Four pieces, 1.5- by 11.5-inch by 4-foot.
(6) Four pieces, 1.5- by 11.5-inch by 3-foot.
(7) Four pieces, 1.5- by 11.5-inch by 2-foot.
NOTE
Any two pieces of the above lumber, 1.5
inches thick by 11.5 inches wide, can be
replaced with two pieces of 0.75-inch ply-
wood of equal length and 22 inches wide.
c.
Approach lumber shoring is stacked two
pieces wide with the center matching each tire
track of the vehicle. Shoring is stacked with the
longest piece on the ground, and each piece added
is 1 foot shorter until the desired height is
reached.
d.
The HEMTT is backed into the aircraft to its
tiedown position and the parking brakes are set.
e.
Suggested tiedown patterns are shown in fig-
ures 4-1 through 4–3. The tiedown devices re-
quired, the location of tiedown points, the corre-
sponding fittings to which the devices are secured,
and the number and capacity of devices required
for loading and securing the vehicles are listed in
tables 4-1 through 4-3.
4- 2
Back to Top
