TM 9-2320-209-10-1 FRAME 2 1. Adjust trailer landing gear (1) to raise or lower semitrailer skid plate (2). Skid plate should be slightly lower than tractor fifth wheel (3). 2. Check to see that semitrailer wheel chocks (4) are in place. NOTE Refer to the operator’s manual, for the trailer to be coupled, for instructions on how to raise or lower landing gear. GO TO FRAME 3 4-218