Preparation and Loading

TM 55-2410-234-14

August 10, 1984

and D8K tractor tracks. If there is no contact, correct.

Figure 1. D8K tractor driven onto the semitrailer, gooseneck extended.

Figure 2. M870 trailer being connected to the M920 truck tractor.

(3) Position the D8K tractor so that the center of the fourth roller (fig 3) is located 122 inches from the

intersection of the gooseneck and the trailer deck, as shown in figure 4. Lower the ripper shank from the extreme up

position until it contacts the trailer gooseneck.

Figure 3. D8K tractor center-of-balance location (fourth roller).

Figure 4. Position of'D8K tractor on the M870 semitrailer.

(4) For the D8K tractor equipped with a winch, back the tractor until the bulldozer rests over the middle trailer

axle, as shown in figure 5.

Figure 5. D8K tractor (with winch) positioned on M870 trailer with bul1ldozer over the trailer's middle axle.

(5) Apply tiedowns as shown in figure 6 and detailed below.

Figure 6. D8K tractor positioned and tied down on the M870 trailer.

(6) Connect all chains in complete loops to create double the breaking strength of the assemblies. Pass the

two chain assemblies at the rear of the D8K around the top ripper pin, through the lower gooseneck fold gap in the trailer,

and under the side chassis frame member. Then loop them through the number one tiedown ring. This threading is

(7) Pass the two chain assemblies at the front of the D8K around the tow hook and the trailer chassis member

located between the two forward rear tires. This threading is shown in figure 6.

(8) When tying down a winch-equipped D8K, attach two tiedowns to the rear clevis on the winch; pass them

through the lower gooseneck fold gap in the trailer and under the side chassis frame member; then loop them through the

number one tiedown ring.