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TM 55-2410-237-14
CHAPTER 6
MARINE AND TERMINAL TRANSPORTABILITY GUIDANCE
Section I. GENERAL
6-1. Scope
This chapter provides marine and terminal transpor-
tability guidance for moving the D7 crawler tractor.
It covers significant safety considerations and pre-
scribes the materials and guidance required to pre-
pare, load, tie down, and unload the vehicle.
6-2. Safety
In addition to the safety precautions in chapter 3, the
following precautions apply:
a. Inspect all slings, lifting rings, shackles, and
other items used in loading and discharging opera-
tions for their condition and adequate capacity.
b. Handle and stow vehicles according to provisions
in Title 46/49, Code of Federal Regulations.
c. Ensure fire extinguishers are available during all
loading and discharging operations.
d. Drain tractor fuel tanks and disconnect battery
terminals.
e. Inspect all lifting provisions, including lifting
eyes and shackles, to ensure they are not damaged.
f. Caution personnel not to walk under items being
lifted.
g. Ensure all lifts have at least two tag lines
attached to control the swing of the lift while sus-
pended.
NOTE
When the D7 tractor is loaded on vessels
that are adequately ventilated by power
blowers, such as the roll-on/roll-off (RORO)
ships, fuel tanks need not be drained.
6-3. Water Shipment
The D7 tractor is transportable by a great variety of
inland-waterway cargo carriers, lighters, and barges
and by all seagoing cargo vessels.
NOTE
The methods described in this chapter for
lifting and securing the D7 tractor are sug-
gested procedures. Other methods of hand-
ling and stowage may be used to accomplish
safe delivery without damage.
Section II. LOADING AND SECURING
6-4. General Rules for Stowing
a. General. When possible, stow the D7 tractor
below deck for protection. In general, good stowage
means placing vehicles fore and aft as close together
as practical, with minimum spacing (about 4 to
6 inches) between outer vehicles and the sweat-
boards. Also, protect breakable parts and stow spare
parts in or near the parent item. Set the brakes and
place the transmission control in neutral.
NOTE
The ripper shanks should be turned upward
for marine transport.
Secure the D7 tractors with blocks in front, in rear,
and on both sides of the tracks to adequately restrain
the vehicles. Brace individual tractor blocks to
bulkheads, stanchions, and other vehicle blocks. Lash
all vehicles with wire rope or chains to nearby
padeyes, bulkheads, or stanchions.
b. Lifting. The correct lifting points on the D7 trac-
tor are on the front and rear of the track roller
frames. Figure 6-1 shows a typical lifting diagram.
c. Loading. Load the D7 tractor on vessels in the
operational configuration when possible to avoid
time-consuming and costly disassembly. Make sure
the hatch girder clearance of the specified vessel is
greater than 134 inches (3.40 m) for the operational
tractor. With the ROPS and exhaust stack removal,
the D7F and G tractors require a hatch girder clear-
ance greater than 96 inches (2.44 m). The D7E trac-
tor requires a hatch girder clearance of 101 inches
(2.57 m). The D7 can be driven, or lifted by cranes of
adequate capacity, aboard landing craft beach dis-
charge lighters, heavy amphibious lighters, and land-
ing ships. It also can be driven or towed aboard
RORO vessels, or onto the decks of barges from a
pier, when tidal conditions are suitable and ramps are
available. The D7 can be loaded onto seagoing vessels
by shoreside of floating cranes of adequate capacity
or by heavy-lift ship’s gear. The D7 tractor cannot be
transported on the LARC-V or LARC-XV lighterage
vessels. Transport by the LACV-30 can be made pos-
sible by reducing the D7 tractor weight to no more
than 45,000 pounds. This involves removing at least
two of the D7 major components such as the blade,
ROPS, ripper, or winch. Figure 6–2 shows typical
blocking and tiedown details. Bill of and application
of materials for blocking and tiedown are given in
tables 6-1 and 6-2.
6-1
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