- 1). Place wheel chock upright on a flat surface. Insert a stud from the bottom of the chock into each of the back two holes in the chock. Place a screw in the top of each stud and tighten them clockwise with a screwdriver.
- 2). Measure the width of the trailer or truck at the front of the surface. Mark the center of the width to center the chock.
- 3). Set the wheel chock on the installation area with its center on the center mark. Trace around the studs with a pencil to mark the position. Remove the wheel chock from the area.
- 4). Set the mounting plates over the marks on the surface so that they center over the two marks. Trace the four screw positions onto the surface. Remove the mounting plates.
- 5). Drill a hole in each of the four screw marks with a ¼-inch drill bit.
- 6). Set the two spacer plates on the surface aligning the screw holes. The spacer plates have an oval opening in the center.
- 7). Set the two mounting plates on top of the spacer plates aligning the screw holes with the round hole facing the rear of the trailer or truck. Place a screw in each of the two holes per side of the chock.
- 8). Slide a washer and lock nut on the protruding end of the screws from underneath the trailer or truck. Turn the lock nut clockwise by hand until it is tight. Insert a screwdriver into the four screws from the top of the trailer. Turn each screw clockwise until they are tight.
- 9). Slide the wheel chock into the mounting plates. The studs slide into the slot on the left and right plates.
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