TM 55-2350-224-14
d. Put the transmission in neutral. For the
M113A3 and M730A2, put the transmission in the
steer lock (SL) position.
e. On some semitrailers the carriers will have 1
to 2 inches of overhang on both sides. Position the
carrier so that the overhang is equal on both sides.
f. Install chain and load binders. Specific sizes
and types of chain and cable assemblies are speci-
fied in table 2-3 and figures 2-1 and 2-2. Figures
2-3, 2-4, and 2-5 and table 2-4 provide detailed
instructions for restraining the carriers against
forces encountered at normal speeds and operating
conditions. The transporter can use other chain and
cable assemblies of adequate strength and size.
The M1068 carrier only requires two
shackle assemblies. The rear tiedown pro-
visions do not need shackles.
Table 2–3. Bill of Materials for Transport by Semitrailer
Item
Quantity
Description
Shackle assembly
4
Shackle, NSN 4030-00-279-4475. Bolt, NSN 5305-01-006-2072. Washer (2),
NSN 5310-00-809-8541. Nut (2), NSN 5310-00-891-3428. (Part number
19207-12381884, MIL-S-24214, grade B, type I, class 3 safety anchor shackle
with a special bolt that has a 0.99 (+0.00, -0.06) in. diameter, with a minimum
breaking load of 122,000 pounds and a minimum proof load of 61,000 pounds).
Chain assembly, option 1a, for loading one carrier on the M870 and the M871
Chain
4
NSN 4010-00-443-4845, 3/8 in. x 14 1/2 ft, grade 70, 6,600-pound safe working
load.
Load binders
4
NSN 3990-01-213-1746, 3/8 in.-1/2 in., type 4 latching, 9,200-pound safe working
load.
Chain assembly, option lb, for loading one carrier on the M172A1 and the M127A2C
Chain
6
NSN 4010-00–803-8858, 3/8 in. x 10 ft, grade 80, 8,250-pound safe working load.
Load binders
6
NSN 3990-01-213-1746, 3/8 in.-1/2 in., type 4 latching, 9,200-pound safe working
load.
Chain assembly option 2, for loading two carriers on the M872 series
Chain
12
NSN 4010–00-803–8858, 3/8 in. x 10 ft, grade 80, 8,250-pound safe working load.
Load binders
12
NSN 3990-01-213-1746, 3/8 in.-1/2 in., type 4 latching, 9,200-pound safe working
load.
Chain assembly, option 3, for loading two carriers on the M1000 series
Chain
4
1/2 in. x 10 ft, high strength alloy steel chains, 12,500-pound safe working load
(BII with M1000).
4
NSN 4010-00-803-8858, 3/8 in. x 10 ft, grade, 80, 8,250-pound safe working load.
Load Binders
4
Adequate strength, 1/2 in., latching (BII with M1000)
4
NSN 3990-01-213-1746, 3/8 in.-1/2 in., type 4 latching, 9,200-pound safe working
load.
When chain not available, option 4
Wire Rope
80 ft
NSN 4010-00–272-8848, 1/2-in. diameter, 6 x 19 IWRC (independent wire rope
core) improved plow steel, regular lay, table X, Federal Specification RR-W-410,
Wire Rope and Strand, nominal BS of 23,000 pounds.
Cable clamps
NSN 4030-00-243-4440 (1/2 in.),
1/2 in.
16
NSN 4030-00-243-4441 (5/8 in.), type I, single-saddled, wire-rope clamp. (Crosby
5/8 in.
8
heavy-duty or one that will meet or exceed Federal Specification FF-C-450.)
Torque capacity equals 65 ft-lb (1/2. in.) or 95 ft-lb (5/8-in.).
Thimbles
8
NSN 4030-00-282-2512, 1/2 in, type III, heavy split oval construction (open pat-
tern), Federal Specification FF-T-276.
Come-along or
1
Adequate strength cable tensioning device.
cable tightener
b. Chain is generally rated by proof test
a. Load binders are generally marked
load or about two times the safe working
with an ultimate breaking strength rat-
load. Appendix C includes a table titled
ing. Depending on manufacturer, break-
"Method of Identification for Inch-Size
ing strength is about three times the safe
Chain."
working load.
2-3
