TM 55-2350-224-14APPENDIX EDETAILED PROCEDURES FOR SECURING THE M577/A1/A2 REAR RAMP DOORE-1. Follow these procedures until new rear tiedown provisions are installed on the underside of thecarrier:a. Before shipping M577’s, put the canvas and poles that are normally stored on the outside rear ofthe carrier inside the carrier.b. Make sure the latch mechanism that holds the ramp closed is fully engaged. Units may have to usea crow bar or some other tool to force the latch down.c. Tighten the lock nut above the latch.d. Drive a wedge (wooden or scrap metal) into the area above the latch, to ensure the latch staysdown.E-2. As an added safety precaution during tiedown and shipment, MTMCTEA recommends units followthe procedures given in steps 1 through 3 below. This requires two, approximately 160-inch long, l/2-inchIRWC cables and sixteen 5/8-inch cable clamps (per vehicle). The word “deck” in paragraphs 1-3 belowrefers to a railcar, airplane, trailer, or ship deck.a. Before securing the carriers run a l/2-inch IWRC cable (minimum diameter) horn the left reartiedown provision to the right rear lifting provision and another from the right rear tiedown provision tothe left rear lifting provision. Secure these two cables, leaving slack in the cables. They will form an “X”on the rear of the carrier. (This will keep the ramp horn falling on someone who is connecting the chainsfrom the deck to the carrier.)b. Connect the tiedown chains/cables from the deck to the tiedown provisions. (Do not leave slack inthe chains.)c. Tighten the two cables on the carrier to remove the slack. This allows the tiedown shackles to hangin the correct orientation (an angle less than 600 from the horizontal).E-1
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