WHEEL LIFT INSTALLATION (WRECKER)
Lower wheel lift in place and rest on the frame of the truck as shown in Figure C. Some notching of the truck frame member on the drivers side may be necessary to provide clearance for the HL4000 valve body & hoses. The wheel lift must be centered between the truck frame members, and the rear angle mount must be even with frame ends to ensure that the mount will be flush with the inside of the wrecker tailboard. Re-align truck frame rails to original dimension (refer to item #2) . Then square the unit to the frame and clamp into postition. Now weld all around rear angle mount and frame rails (#1 in Figure C) . The quality of the weld should meet or exceed AWS D1.1 Structural Welding Code (this refers to making a structurally sound weld with one of the following processes: SMAW (ARC), MIG or TIG .
- REINSTALLATION OF WRECKER BED - The wrecker bed is now ready to lower back onto the truck chassis. Be sure that everything is clear when lowering the bed onto the chassis. after the bed is in place, drill (2) holes - 9/16" - through the tailboard of the wrecker bed and the rear angle mount of the wheel lift (refer to Figure G for approximate location of holes) . After the holes are drilled, install and tighten (1) 1/2" x 2" bolt, locknut, and (2) flat washers in each hole.
- HYDRAULIC SYSTEM HOOK-UP FOR HYDRAULIC WRECKER - Now you are ready to tie the new wheel lift valve into your existing hydraulic system. To do this, you must first disconnect the high pressure pump line from the existing valve inlet and tie this line to the inlet (port "IN" in Figure H) on the new valve. You will probably have to splice into your existing high pressure line or run a new line in order to reach the new valve. From the wheel lift valve port "BYD" (see Figure H), run a new high pressure line back to existing valve inlet. Now run a low pressure overflow line (1" OD fitting provided) from "OUT"port to reserve tank. To accomplish this you must tee into your existing overflow line. In the above steps DO NOT bypass existing hydraulic filter. All new lines must be secured to prevent any interference with the HTL4000 slide unit. Also, check and be sure that all hydraulic lines on wheel lift itself are clear from any obstruction such as tailpipes, truck frame, differential, etc.
Should you need further assistance, or if you have questions regarding the installation procedures, please call our Service Dept. Improper installation will void any warranty agreement you have with HT Recovery and the HTL4000 wheel lift.