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Old 06-20-2015, 10:43 AM   #1
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Reese Revolution Pin Box

Picked up our new Flagstaff 8528IKWS last month and brought it home. Finally got ready to start using it and decided to weigh it at a scale about 6 miles from home. When back home and unhitching I noticed metal pieces in the bed of the truck. The cotter pin from the castle nut where the pin box rotates had sheared off. I called Reese and they thought the nut may not have been torqued enough and maybe dirt or sand between the pivot plates.
I disassembled the pin box and cleaned, lubed (it was very dry) and re-torqued the nut. Wonder if anyone else has had this happen.
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Old 06-20-2015, 10:47 AM   #2
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I hope you didn't lube the actual shaft that the pinbox rotates on. We were told by the 2 engineers that designed it to NEVER lube the pivot shaft, just a little lithium grease on the flat plates.
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Old 06-20-2015, 10:49 AM   #3
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OC correct. Sounds like a torque issue for sure. This a near disaster waiting to happen. I would see my dealer for a review of what has happened, just for warranty sake.
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Old 06-20-2015, 10:50 AM   #4
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I lubed everything on the pinbox. I guess I'll contact tech at Reese and ask. They are very helpful.
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Old 06-20-2015, 10:52 AM   #5
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OC's words are gospel...no one on this site knows more about that pin box.
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Old 06-20-2015, 10:59 AM   #6
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Quote:
Originally Posted by randygk View Post
Picked up our new Flagstaff 8528IKWS last month and brought it home. Finally got ready to start using it and decided to weigh it at a scale about 6 miles from home. When back home and unhitching I noticed metal pieces in the bed of the truck. The cotter pin from the castle nut where the pin box rotates had sheared off. I called Reese and they thought the nut may not have been torqued enough and maybe dirt or sand between the pivot plates.
I disassembled the pin box and cleaned, lubed (it was very dry) and re-torqued the nut. Wonder if anyone else has had this happen.
How many pounds did you torque it to? X'2 what OC said, just dry lube the pad area. That's a first that I heard of that the cotter pin broke.....Was it loose when you retorqued it?
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Old 06-20-2015, 11:01 AM   #7
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Did you remove the hitch completely off the pivot shaft in the back?
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Old 06-20-2015, 11:09 AM   #8
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The pin was sheared on both ends with the rest of the pin still in the threaded bolt end. Nut had started to loosen a little bit. I just emailed the tech I had contacted about lube requirements and there is a case #. Torque is 80 lb ft min, then tighten to next cotter pin hole. I noticed they call for a 1/4" cotter pin as the one I removed was about .190". It's probably one of those 1/2 inch plywood being less than 1/2" thing. I can't understand why they would not want the shaft lubed, but hopefully I'll find out.
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Old 06-20-2015, 11:12 AM   #9
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Just lowered pin box enough to clean and lube. Don't know what the pin box weighs, but maybe another time I'll remove it completely.
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Old 06-20-2015, 11:30 AM   #10
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From the manual;
MAINTENANCE:
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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