TM 9-2320-209-20-3-1 e. Raising Rear of Chassis (Both Sides). 1. 2. 3. 4. 5. 6. 7. Chock front wheels as shown. Put hydraulic jack under crosstube bracket (1) as shown. Jack up truck until rear wheels (2) are six inches off the ground. Put four 42-inch wood blocks (3) under truck as shown. Put four 24-inch wood blocks (4) on top of each set of wood blocks (3) as shown. Put one trestle (5) on top of each set of wood blocks (4) and set trestles under chassis (6). Using hydraulic jack, lower truck onto trestles (5) and take away hydraulic jack. Using hydraulic jack, jack up other side of truck and do steps 4 through 6 again. END OF TASK 11-10