View Single Post
Old 03-07-2012, 09:51 PM   #7
RCrawler
Senior Member
 
Join Date: Jun 2011
Location: Southern Oregon
Posts: 118
I have done quite a bit of research on this lately. The adaptor is pulling at the same point as the jaws of the 5th wheel would. The only difference is the adaptor that tightens to the king pin plate. Because of the gooseneck attachment design, there should be minimal binding that would cause extreme leverage to be put on the king pin box.
The only way that I see that would cause structure failure in the 5th wheel frame is if the adaptor is allowed to work loose on the kingpin. If it isn't tight up against the pin box, then the load is taken off of the king pin itself and is transferred to the plate. Between the leverage working against it and the constant shock loading of acceleration and braking, yes, at that point it could cause a failure.

A coworker runs one on his Dodge. Because of clearance issues with his flatbed, he modified it by extended it back 8" with a piece of 1" plate. This is the second trailer he's used it on and hasn't had any issues with either of them.

Jason
__________________
'11.5 (EDITED) 3500 CCLB 4x4 (EDITED) 6.7 HO, auto, DPF and EGR deleted by (EDITED) , Mini Maxx, 5" exhaust,

'12 (EDITED) 324RLB- 3 bedroom, 1 1/2 bath
RCrawler is offline   Reply With Quote