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View Full Version : Trailer bouncing on right side


jakethebt
07-09-2013, 09:11 AM
This past Saturday my brother was following me home from the lake. He said that my right side of my trailer was bouncing a lot more than the left side. I had noticed it before from the truck, but was never concerned enough to investigate. From behind, he said the difference was pretty drastic. Single axle trailer. We looked at the springs, but could not find any obvious defects. I have heard of the mid-90s trailer leafs breaking before, dropping the fender down on the tire.

Any ideas? Is the bouncing right side about to go? Is the left side already broken and should be where I am focusing my attention?

One note, I put new trailer tires on last spring before driving it home after purchase. Maxxis tires. Same on both sides and I check tire pressure often and it is usually the same side to side and the tires donít seem to leak over time. There are no obvious differences in the tires.

madcityskier
07-09-2013, 09:15 AM
Lose weights on one, new it's out of balance? If one spring had been replaced there could be a difference. Maybe as simple as tire pressure. Did you leave a filled fat sac on one side?

bigmac
07-09-2013, 09:26 AM
Take the tires in and get them spin balanced? At that time they can check to make sure they are both round. Out-of-round tires aren't that uncommon, especially trailer tires. You can check leaf spring quality by measuring the distance between tire and fender. If they're both roughly equal then that's not likely to be the culprit.

I'd bet on tire/wheel out of balance or out-of-round.

Double D
07-09-2013, 09:33 AM
Or your tire could have a bad belt or a bubble in it ready to pop. That happened to me and I had one heck of a shake back there before it blew.

thatsmrmastercraft
07-09-2013, 10:16 AM
Have a look at the wheel bearings. When they are loose, it is not uncommon to bounce or track poorly.

johnnye23
07-09-2013, 12:45 PM
I would check air pressure,then swap wheels/tires side to side and see if it follows.

jakethebt
07-09-2013, 01:40 PM
Thanks for all the ideas. I will try and switch tires and see if it follows. I can do that myself and not have to take it anywhere.

No ballast, no uneven weight. Tires are running at same pressure. Only difference I can think of on right to left balance would be the spare tire in the front on the right side.

The bouncing is mainly in reaction to bumps. It tracks fine, but when you hit a bump, the right side seems to bounce more. Kind of makes me think springs?

I will check the bearings too. Just looking for looseness in the bearings? Loose gland nut? Feel for wobble in the brearing or grinding?

thatsmrmastercraft
07-09-2013, 01:50 PM
Thanks for all the ideas. I will try and switch tires and see if it follows. I can do that myself and not have to take it anywhere.

No ballast, no uneven weight. Tires are running at same pressure. Only difference I can think of on right to left balance would be the spare tire in the front on the right side.

The bouncing is mainly in reaction to bumps. It tracks fine, but when you hit a bump, the right side seems to bounce more. Kind of makes me think springs?

I will check the bearings too. Just looking for looseness in the bearings? Loose gland nut? Feel for wobble in the brearing or grinding?

Raise and support the trailer axle. Grab tire at top and bottom and look for play. Do the same thing on side to side. Also turn the wheel and listen/feel for noise and/or roughness.

If you ever hear of someone losing a bearing buddy while on the road, you can count on it being the result of a bad wheel bearing.

sp00ky
07-11-2013, 12:50 AM
Or your tire could have a bad belt or a bubble in it ready to pop. That happened to me and I had one heck of a shake back there before it blew.

Same thing happened to me right before sidewall exploded.

TxsRiverRat
07-11-2013, 10:56 AM
Brakes seized on that side?

mtajpa
07-11-2013, 11:11 AM
Happen to me I noticed the rear axle bouncing a bit in my rear view mirror, Turned out to have a separated tire.

P-hat_in_Cincy
07-11-2013, 11:19 AM
Or your tire could have a bad belt or a bubble in it ready to pop. That happened to me and I had one heck of a shake back there before it blew.

Ditto! I learned to watch my guide poles. If one started to shake more than usual, I would pull off and check the tire.

jakethebt
07-23-2013, 01:12 PM
Thanks for all the help so far.

Tires are good. Pressure are good. Wheels feel tight. Bearings feel ok. Brakes dont appear to be dragging. It stops fine and I can roll it around my garage by hand.

The one thing I noticed is the right side, bouncy side, the tire is closer to the fender than the left side. Weak spring? I can even see a slight bit of evidence of a rub on the outside tread portion of the tire. At least that is what I think it could be from?

I have looked at the springs. I can not tell any difference. No cracks, etc. They are both a bit rusty as the PO left the trailer out side. The trailer will get a repaint some day, but not yet. I have heard of springs breaking in this year range, so that is where my focus is. Is there any way to check the springs?

Any idea where I can get direct replacement springs?

wakeX2wake
07-23-2013, 01:43 PM
i know this has been covered but... mine did that exact thing for about 50 miles before it blew out on me.

BrooksfamX2
07-23-2013, 02:03 PM
Or your tire could have a bad belt or a bubble in it ready to pop. That happened to me and I had one heck of a shake back there before it blew.

Yes, this happened to me last year. Tire was separating and bouncing like crazy...........

jakethebt
07-23-2013, 06:41 PM
Mine is only bouncing when I hit bumps, and then it is a very uneven bounce. The left side seems to respond ok, but the right bounces several times more.

thatsmrmastercraft
07-23-2013, 06:51 PM
How old are your tires and what tire are you running? Look at DOT date codes for age.

jakethebt
07-26-2013, 12:50 PM
Bought brand new maxxis last spring. Running at 50 psi, both sides, no slow leaks. Keep indoors all year.

thatsmrmastercraft
07-26-2013, 01:32 PM
Bought brand new maxxis last spring. Running at 50 psi, both sides, no slow leaks. Keep indoors all year.

Is 50 max psi for those tires?

I would do some backyard calculations on spring rates. Measure the spring height, then put a few people in the boat and measure again. Might have to stop by Old Country Buffet to do a good job, but you might find a difference in spring rate that way. Sometimes a leaf cracks and it isn't noticeable until the spring pack is taken apart.