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TM 55-2410-237-14
CHAPTER 7
RAIL TRANSPORTABILITY GUIDANCE
Section I. GENERAL
7-1. Scope
This chapter provides rail transportability guidance
for moving of the Caterpillar D7 crawler tractor. It
covers physical characteristics and safety considera-
tions. It also prescribes the materials and guidance
required to prepare, load, and tie down the D7 tran-
7-3. General
The transportability guidance in this section applies
to transport of the tractor on CONUS railways. It
includes both single and multiple movements for the
types of flatcars normally used in moving this
tractor.
7-4. Preparation
Load the D7 tractor on the flatcar in the operational
configuration, when possible, to avoid time-consum-
ing and costly disassembly. However, the D7 may
require disassembly along some rail lines where
restrictions such as tunnels or bridges occur. When
transporting the D7 tractor with minimum restric-
tions in CONUS on a standard 50-inch-high flatcar,
remove the tractor dozer blade to reduce the width.
Remove the exhaust stack to reduce the height. The
exhaust stack can be transported on the tractor if it
is securely stowed. Also, turn the ripper shanks
upward to prevent railcar damage.
7-5. Loading the D7 Crawler Tractor
on General-Purpose Flatcars
a. The tractor may be placed in the tiedown posi-
tion on the flatcar by a crane, or it may be driven or
towed if a suitable ramp or bridge is available. When
loading the vehicle by crane, follow the procedures
and precautions in paragraphs 6-2 and 6-4b.
b. Figure 7–1 shows typical loading diagrams of the
tractor on a general-purpose flatcar with a minimum
width of 10 feet 4 inches. The type of blocking and
tiedown shown is compatible with standard loading
practices and provides adequate restraint against the
forces encountered during movements at normal
speeds. Figure 7–2 shows the D7 blocking and
tiedown details.
CAUTION
Do not allow the tractor to exceed 3 miles
tor on open-top flatcars.
7-2. Maximum Utilization of Railcars
Additional cargo, as approved by the activity offering
the items for transport, may be transported with the
tractors.
Section II. TRANSPORT ON CONUS RAILWAYS
per hour during loading and unloading oper-
ations.
NOTE
A staggered nailing pattern should be used
when lumber or laminated lumber is nailed
to the floor of a railcar. The nailing pattern
for an upper piece of lumber should be
adjusted so that a nail will not be driven into
or against a nail in a lower piece of lumber.
NOTE
For the D7E and F models, the middle
tiedown provision, located on each side of
the track roller frame between the multipur-
pose (lifting and tiedown) provisions, can be
used if additional tiedown is desired.
c. Table 7–1 is the bill of materials for blocking and
tiedown of the D7 tractor on a CONUS general-pur-
pose flatcar. Table 7–2 provides information for the
application of materials required to restrain the
vehicle.
NOTE
Refer to figures 5–2 and 5–4 for other
tiedown points that can be used for trans-
porting the reduced D7 tractor.
7-6. Loading the D7 Crawler Tractor
on Wooden-Deck Chain-Tiedown
Flatcars
a. The tractor can be loaded on the wooden-deck
chain-tiedown flatcars by the procedures in 7–5a.
b. Figure 7–3 shows a typical loading diagram of
the D7 tractor on a wooden-deck chain-tiedown flat-
car with a minimum width of 10 feet 4 inches.
7 - 1
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