From the manual;
1. For ease of hookup; frequently lubricate the wedge surfaces, back side of the king pin, and the skid plate surface.
2. Keep pin-box hitch painted to prevent rust and maintain a good appearance. (Do Not paint over labels)
3. Tear down and inspect annually. Repair or replace any wore items. When reassembling use lithium on the wear plate,
wear bushing, and bearing. Tighten large castle nut to a minimum of 80 ft. lbs. and then tighten to nearest through hole
for cotter pin installation.
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