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Installation Instructions SPECIFICATIONS ?? Fits 1997-2003 Ford F-150 (not Supercrew) KING PIN TRAILER PLATE INSTALLATION FOR KING PIN BOXES WITH A FLANGE : Figure3. 1. Place the Trailer Plate {J2} over the King Pin, with the guide wedge towards the rear of the trailer (wedge facing down). Align the Trailer Plate {J2} square with the king pin box and clamp in place to prevent movement. 2. Mark the holes for drilling through the Trailer Plate {J2} onto the King Pin Box flange. 3. Remove the Trailer Plate {J2} or use it as a guide and drill ¼ ” holes through the flange. 4. Re-install the Adapter Plate (as in step 1). 5. Use the ¼” bolts provided, to secure the Trailer Plate {J2} onto the king pin box flange. A minimum of 10 bolts must be used to fasten the plate on. For use with heavy trailers, more bolts will be needed to secure this plate. Figure 3 FOR KING PIN BOXES WITHOUT FLANGES: (Figure 4) 1. Place the Trailer Plate {J2} over the King Pin, with the guide wedge towards the rear of the trailer (wedge facing down), and hold in place to prevent movement. 2. The Trailer Plate {J2} can be secured to the King Pin Box sides by welding angle iron supports to the King Pin Box, or use the procedure in step 3. (Angle iron is not provided). 3. For the holes where you cannot reach the backside, drill holes with a #8 drill and tap with a ¼”-20 tap. 4. If the Trailer Plate {J2} extends beyond the King Pin Box, then install the Knee Braces as shown in Figure 4. 5. Install the Trailer Plate {J2}, using the ¼” bolts provided, to secure the Trailer Plate {J2} onto the King Pin Box . A minimum of 10 bolts must be used to fasten the plate on. For use with heavy trailers, more bolts will be needed to secure this plate. The fasteners used in step 4 do not count as part of the minimum number of bolts re- quired. FOR KING PIN BOXES THAT ARE SHORTER FRONT TO BACK: (Figure 5 ) 1. Place the Trailer Plate {J2} over the king pin, with the guide wedge towards the rear of the trailer (wedge facing down), and measure the distance from the front and rear of the king pin box to the respective edges of the Trailer Plate {J2} (to the bend of the Trailer Plate {J2} in the front). Referring to Figure 5, fashion two plates, 3/16″ to 1/4″ thick, that will cover the holes of the Trailer Plate {J2} showing in front and rear of the king pin box. 2. While the trailer plate is in position under the king pin box, clamp these plates to both the front and rear of the Trailer Plate {J2}. Remove the Trailer Plate {J2} and drill matching holes in the two support plates with a 1/4″ bit using the Trailer Plate {J2} as a guide. 3. Fasten the two support plates to the Trailer Plate {J2} with the 1/4″ Bolts {K7} and Lock Nuts {K8} provided. 4. Replace the Trailer Plate {J2} on the king pin box, check for square alignment and weld the support plates to the king pin box. 5. Attach the Knee Braces {K2,3 & 4} to the king pin box and the Trailer Plate {J2}. Braces {k2} may have to be welded on if the interior of the king pin box is not acces- sible.
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