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Custom Fit Trailer Hitch
Never modify the hitch in any way. Do not drill holes into the hitch to mount accessories, etc. Never cut holes or modify the assembly using a torch. This weakens the metal, produces a ragged hole, and presents an unnecessary fire hazard. Never weld a hitch to the vehicle frame. Welding on the frame of the vehicle can weaken the frame.
You can also use a drill to enlarge the access hole. This will allow for easier access for the bolt leader, spacer block, and bolt.
Trailer hitches are powder coated; the way the manufacturer ships the products on pallets, the hitches can get scratched because they are stacked on top of each other. Also, due to the nature of a trailer hitch, being exposed to the elements and constant road travel, the hitch will have a tendency to rust. It is a good idea to periodically check a trailer hitch after it has been installed for any signs of rust. If the paint seems discolored or looks like it has begun to rust, it is a good idea to repaint the rust spots on the hitch to help protect it. Any black spray paint will help to protect your hitch.
Many hitches use carriage bolts and special washer blocks or plates, which act as a wrench inside a boxed-in section of the frame to hold the bolt during tightening. The plates also help reinforce the frame by spreading the load to the frame edges.
Another method used for boxed-in or enclosed sections of the frame is to use U-bolts. Make sure that the two nuts are drawn up evenly on the U-bolt during installation. If one nut is installed at a time, the U-bolt may bend and break.
Some attachments to boxed-in areas are made with "handle nuts." Inserted through an access hole, the handle locates the nut over the hitch attachment hole and prevents the nut from turning when the bolt is tightened. Do not forget to trim off the excess handle or to bend it away from other wiring or other components.
Prevailing-torque locknuts are used for certain critical attachments. These will not spin on freely, but will resist turning all the way on. Do not substitute a free-spinning nut where a locknut has been provided. Hardened washers with peripheral teeth are used on certain slotted attachments. The toothed side should go against the slotted member as shown below.
Prevent corrosive action between steel hitch components and aluminum attachment areas. Remove the paper backing and adhere the isolator to the hitch where indicated in the instructions. Pierce the isolator with a screwdriver to allow a bolt to slide through.
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