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Old 11-11-2013, 11:03 PM   #85
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Originally Posted by Jim Flower View Post
Like this?
Backing uphill in the mud. Jim
You can only back straight up and no uphill mud climbs.

That leaves me out....
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Old 11-11-2013, 11:13 PM   #86
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This is really simple.
Route the chains the way they are supposed to go.
You will never have this happen again.
If you do "jackknife" again and you have the chains in the proper place all you will need to do is loosen 4 nuts and re-center the cross bar on the trailer.
Ask me how I know.....
This is actually one benefit of the ProPride vs the Hensley design.
Bruce
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Old 11-12-2013, 07:06 AM   #87
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Thanks everyone. I have contacted a mobile rv service. I'll have them check out the entire hitch and I should be on the road again by Thursday, a little wiser. With great gratitude, Annie
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Old 11-12-2013, 09:24 AM   #88
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Keep having fun Annie!! We've all made mistakes and the important thing is no one was hurt and you'll be back on the road and having fun very soon! In the meantime, enjoy some camp coffee.
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Old 11-12-2013, 10:35 AM   #89
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This thread is starting to remind me of a state park in Utah, Dead Horse Point. It has been beat to death and all we are getting now is speculation, which apparently has no end.
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Old 11-12-2013, 03:17 PM   #90
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Originally Posted by anniemaine View Post
My stinger is significantly bent and slightly twisted.
Are there 2 bends or just one. In the picture looking down it looks like it bent as it comes our of the TV receiver as well as where it attaches to the adjustable portion of of the bar.
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Old 11-12-2013, 04:30 PM   #91
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Looking at the picture of the hitch head and not the stinger, it would seem that there are two possibilities to bend the ends of the hitch head plate upward, 1) a turn with the chains caught between the head and bars---
Looking only at the photo which was posted by Annie, I can see how one might conclude a chain got caught between head and bars.
However, the above photo of a different hitch from a different angle indicates a clearance of more than 2" between the bar and the plate which was shown as "rippled" in Annie's photo.
It seems to me there is plenty of room for a chain to be pulled across the bar without getting caught.

If a chain were routed over the left bar and the TT swung to the right, the weight of the drooping chain between bar and receiver would keep the chain down on the bar. The chain would follow close to a straight line between bar and the chain attachment point. The chain might or might not contact the plate. If it did, the tension in the chain would not be sufficient to damage the plate. Remember, Annie said her chains almost touched the ground, so there would be plenty of excess length to keep them from becoming taut. Only about 1.6" of chain would be pulled across the bar as the TT swings.

Quote:
---or 2) a jackknife situation where either the chains or bars moved upward to bend the plate.---
I see no way that a bar could move upward. The front end of a bar is prevented from moving upward relative to the plate by virtue of its being locked in its socket. And, I see no way that a chain would cause any load on the plate.

Quote:
---The point of the bend and the bars/chain condition or markings should tell. The greater damage on the head looks to be on the left side.
I agree there is not enough evidence to say what caused the "ripple".

Instead of automatically assuming the main head was prevented from rotating due to an incorrectly routed chain, I think we should defer passing judgment until we have a better basis for knowing what really happened.

Ron
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Old 11-12-2013, 05:10 PM   #92
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Quote:
Originally Posted by Ron Gratz View Post

I agree there is not enough evidence to say what caused the "ripple".

Instead of automatically assuming the main head was prevented from rotating due to an incorrectly routed chain, I think we should defer passing judgment until we have a better basis for knowing what really happened.

Ron

When you complete your investigation of the evidence I hope you'll invite me to your courtroom for the passing of judgment.


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Old 11-12-2013, 05:41 PM   #93
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oh oh . . . two hitch conspiracies in one thread.
I actually really like my Hensley. I was just trying to demonstrate the accuracy of Sean's assessment of what happens in a nasty situation. I have created lots of nasty situations while trying to learn all sorts of things. Most of the nasty stuff has only happened once, except for backing into things, which I have now remedied. Jim
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Old 11-12-2013, 05:42 PM   #94
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Old 11-12-2013, 07:02 PM   #95
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---If you do "jackknife" again and you have the chains in the proper place all you will need to do is loosen 4 nuts and re-center the cross bar on the trailer.---
In order for the cross bar to "slip", it has to overcome the friction force between bar and frame.

The friction force depends on the tension in the U-bolts and the condition of the surfaces of cross bar and frame.
The tension in a U-bolt depends on the condition of the U-bolt threads and the amount of torque applied to the U-bolt nuts.

Seems to me that if the friction force is too great, the cross bar will not slip when it should, and hitch/stinger damage could occur.
And, if the friction force is too small, the cross bar will slip when it should not, and the sway-resisting ability of the hitch will be reduced.

My first question is -- how does one know the correct amount of torque to apply to the U-bolts?

The online version of the ProPride INSTALLATION And OPERATION Instructions which I cited in an earlier post simply states:
"Step 7: Tighten the U-Bolt Hex nuts with your 11/16 socket."
I find no mention of the proper amount of torque.

My second question is -- how far can the cross bar slip? It looks as if the U-bolts pass through slots in the cross. If so, the amount of "slip" would be limited by the length of the slot and the proximity of the bolts to the sides of the A-frame.

If the cross bar slips 1" and the length of the yoke assembly is 20", the upper unit of the hitch head could rotate an additional 3 degrees before further rotation is prevented.
This means that an overload condition could occur at a TV/TT relative angle of approximately 86 degrees instead of approximately 83 degrees.

It seems to me that a slipping cross bar simply allows one to back into a slightly sharper angle before potential damage occurs.

Ron
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Old 11-12-2013, 07:53 PM   #96
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Old 11-12-2013, 08:05 PM   #97
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Originally Posted by Jim Flower View Post
I actually really like my Hensley. I was just trying to demonstrate the accuracy of Sean's assessment of what happens in a nasty situation. I have created lots of nasty situations while trying to learn all sorts of things. Most of the nasty stuff has only happened once, except for backing into things, which I have now remedied. Jim
Sorry Jim, my inability to communicate well. The sarcasm wasn't directed to you. The "two conspiracies" suggestion was making light of those who are trying to inflate the bending of a hitch bar assembly from backing too sharply, while possibly limiting the ProPride's movement with improperly positioned safety chains. When you posted the Hensley hitch damage from something similar, I snickered to myself "two conspiracies", and made a dumb reply.
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Old 11-12-2013, 08:36 PM   #98
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Annie, I congratulate you on giving things your best shot and sharing the bent bar issue. Fortunately, you will be or are back on the road by now continuing your journey. I would imagine that anyone who has pulled a trailer has has an aww sh** moment at one time or another but the most important things is that you recognized there was a problem, are getting it corrected and now have more knowledge as to hopefully prevent it from happening again.
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