(4) Apply tractor parking brakes by pulling out parking brake valve (3). Remove four wheel chocks (4) from
stowage on tractor and chock wheels on tractor.
(5) Remove hitch pin (26) and crowbar (27) from rear of semitrailer below loading ramps. Reinstall hitch pin (26).
(6) Adjust ramp span width to match payload track width as required (para. 2-20).
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