QRTRHRS
Elite Member
I have a trap door on my non dumping flatbed to access the gooseneck ball. I wish mine was a dump and thought about converting it but the bed has the wrong frame rails (too shallow).I have been looking at the 10 year old IH 4700s with aprox. 140,000 miles online for several years. Never have had a chance to drive one, but would like to get an idea of how they perform. Was wanting to build a tow rig for my gooseneck trailer. The ones I see are as some of you have indicated retired fertilizer rigs. I would install a 11' or 12' flat bed with stake pockets and removable sides. I wonder if you could safely install a flat bed, with hydralic dump feature and gooseneck hitch. Perhaps have goose hitch mounted to frame below a trap door in the flat bed. I would not want to have hitch mounted to the bed unless it was directly bolted to frame. Total trailer weight empty is aprox. 7500lbs with around a 19,000 lb load to be hauled on the trailer. I will be following this topic closely to see how it might work out for those that go the Lo Pro route. I have a 97 F350 with 60,000 miles and also a 97 E-350 225,000 miles. Both 7.3s. They do run for ever, as long as you keep up with fixing them, forever. Actually the only really costly repair was 2 bent valves, 2 bad lifters on the van. New computer on the pick-up. Robert F
The most common dump hydraulics have the ram in the wrong place. I have seen applications with dual rams, one on either side of the bed that may work. You can also go with a front mounted vertical ram that is covered with a box.
My trap door is only about 12"x12". I would go bigger if specing a new bed to allow room for an air bag assisted gooseneck drop tube.
One thing not mentioned so far about medium duty trucks, ie; under CDL. As mentioned, these trucks often as not have low HP rated engines and last a long time. True! But, being non CDL, any yahoo can and often does drive them. Many have had the crap run out of them.
Buying used is always a crapshoot but some signs are an interior that has broken switches and/or excess wear such as a sloppy shifter, worn clutch, bent bumper, etc.