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Old 10-31-2007, 11:05 AM   #1
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Question Help for a vibration problem

I recently installed a new complete henschen axle, w/drum brakes (3500#) on my '77 six metre Minuet, along with new aluminum wheels rated to 2810# ea and new Cooper ST225-75R15 load range D, rated to 112mph. The tires & wheels were balanced at a local tire store. The lug nuts are tightened to 100 ft lb and tire pressure is set to 50 lb. I also installed a new Equil-i-zer hitch with the lightest bars (600lb) and it has been properly set and adjusted (I think). The trailer now rides a good 4 to 5 in higher and everything rides level. I'm towing with a Honda Pilot, which is more than enough for this lightweight trailer.

Unfortunately I have a vibration at speeds above 50 mph which I didn't have before with the brokendown old axle, worn out passenger car tires and the lousy old hitch set up without sway control. It was as smooth as silk up to 75 mph, though I'm sure was quite unsafe.

Andy always suggests balancing the running gear, including the hubs & drums as a unit, but finding anyone around here (metro Atlanta) that can do it is a problem.
Does anyone have experience with "Dyna Beads" and any other suggestions for me.

Thanks, Geo...
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Old 10-31-2007, 11:12 AM   #2
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I think you need to balance your drums too.

There is a process described on Inland RV's website.
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Old 10-31-2007, 11:16 AM   #3
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Quote:
Originally Posted by georgezink
I recently installed a new complete henschen axil, w/drub brakes (3500#) on my '77 six metre Minuet, along with new aluminum wheels rated to 2810# ea and new Cooper ST225-75R15 load range D, rated to 112mph. The tires & wheels were balance at a local tire store. The lug nuts are tightened to 100 ft lb and tire pressure is set to 50 lb. I also installed a new Equil-i-zer hitch with the lightest bars (600lb) and it has been properly set and adjusted (I think). The trailer now rides a good 4 to 5 in higher and everything rides level. I'm towing with a Honda Pilot, which is more that enough for this lightweight trailer.

Unfortunately I have a vibration at speeds above 50 mph which I didn't have before with the brokendown old axil, passenger car tires and the lousy old hitch set up without sway control. It was as smooth as silk up to 75 mph, though I'm sure was quite unsafe.

Andy always suggests balancing the running gear, including the hubs & drums as a unit, but finding anyone around here (metro Atlanta) that can do it is a problem.
Does anyone have experience with "Dyna Beads" and any other succestion for me.

Thanks, Geo...
How bad is the vibration? If you can feel it in the tryck while towing, then it must be pretty severe.
I would suggest to jack up one side of the trailer at a time, so the wheel is barely off the ground, and slowly rotate it and do a visual inspection first.
Check bearing adjustment, and make sure that the brake isn't too tight. See if the wheel has a tendency to rotate by itself to a stop, or if it stays where you put it. This might require loosening the bearing slightly if it's adjusted too tightly. I have had brake hub imbalance so severe before, that the wheel would act like a pendulum, always rotating to the same position.
From the sound of it, though, something might not be hub-centric with your setup. Check the tires also, make sure there are no out of round areas.
Even with out of balance hubs, I have never heard of anyone feeling teh vibration in the truck while towing. I am not an alarmist by any stretch, but this would require immediate investigation if it was my rig.
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Old 10-31-2007, 11:24 AM   #4
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Try rotating your tires 180 degrees on the axles one at a time. that way when it changes you will know which one is the problem child.
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Old 10-31-2007, 11:31 AM   #5
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Try rotating your tires 180 degrees on the axles one at a time. that way when it changes you will know which one is the problem child.
How that?
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Old 10-31-2007, 11:37 AM   #6
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I'll try to explain.

Quote:
Originally Posted by uwe
How that?
If the combination of the tires which maybe balanced or not completely may be causing a bigger problem than the one piece along. Rotating the tire changes the relationship of the running gear and the tire. THe changes the overall balance of the setup. A bad tire can cause a vibration as well. even new ones.
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Old 10-31-2007, 11:45 AM   #7
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Vibration

I would put Centramatic's on both trailer and tow vehicle. Never need balanceing again.
I went thru this with my Argosy and the final solution was the ball socket was worn out and I had it replaced. Be sure the welder know's what he is doing. No more vibration.

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Old 10-31-2007, 11:46 AM   #8
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Quote:
Originally Posted by thecatsandi
If the combination of the tires which maybe balanced or not completely may be causing a bigger problem than the one piece along. Rotating the tire changes the relationship of the running gear and the tire. THe changes the overall balance of the setup. A bad tire can cause a vibration as well. even new ones.
Ahhh, you mean taking the wheels off the wheel studs and remounting 180...that makes sense. Although, the author claims that the tires/wheels were balanced.
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Old 10-31-2007, 12:26 PM   #9
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Thanks for the suggestions.

Vibration is not bad, but annoying.

I'm trying to find a place that can balance the drums.

I'll check the bearing and brake adjustment as you suggest and will look for out of balance/ out of round.

I'll try rotating as well -- couldn't hurt.

Centramatic sounds good but is too expensive.
Has anyone heard of, or had experience with, "Dyna Beads"?

The ball is new and the old ball & socket worked fine just prior to this.

I think I'll first try to have the tires/wheels balanced at a different shop to see if that makes a difference.
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Old 10-31-2007, 12:38 PM   #10
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I had the same problem with a utility trailer. The tire dealer seemed to think balancing a tire for a trailer was not as critical as a passenger vehicle so he was at best, close. It was still far enough off to shake my truck.
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Old 10-31-2007, 04:47 PM   #11
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Getting a complete balance around here is out of the question. I spent most of the day on the phone, to no avail. I know how it should be done, per Andy's website (I bought the axle from him), but I can't find anyone here that can do it. I'll try a good spin balance and hope that helps.

Still would like to hear from someone with experience on "Dyna Beads".

By the way, replacing the axle was a snap. Did it by myself. A bit heavy, but a lever and a fulcrum, brute strength and awkwardness held it in place while I threw the bolts home. No welding, no adjustment -- fit like a glove.
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Old 10-31-2007, 04:54 PM   #12
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Member "Li Pets" and others have used Dyna Beads, here is just one of the threads that I found when I did a search. Try it, you'll find many more.
Dave

http://www.airforums.com/forums/f438...ate-32907.html
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Old 10-31-2007, 05:13 PM   #13
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For less than $100, you can get a static, bubble balancer, at places like J.C.Whitney Automobile, Truck & Motorcycle: Parts & Accessories or Harbor Freight Harbor Freight Tools that should allow you to balance the drums and wheels. Static balance is more than adequate.
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Old 10-31-2007, 07:34 PM   #14
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Why not try having the tires lug centric balanced - it's more precise - at least from what I've read. It's either discount tire or tire discounters that is able to offer that. May be a relatively inexpensive first effort.
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