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Deb & Kenís Hoppy
01-10-2019, 08:53 AM
Hello, new member here. I've learned a lot from your posts and thank you.
I discovered the street side rear tire on our 2009 2980RL was completely bald just on the inside of the tire. The other three tires were fine and all four were new with only 8000 miles. The first thing I heard from others was it must be a bent axle. So, I put a level on the tire - perfectly plumb! I put a straight edge to the two axles - no deviation. I spun the wheel when it was off the ground - no wobble. I check the pressure before each trip.
I'm stumped! does anyone have some insight into what could be going on?
Thanks in advance.

waynemoore
01-10-2019, 09:08 AM
You need to take it to an expert like a trailer alignment shop. There is just no way you can check it without the proper equipment.

Also welcome to the forum.

jimcol
01-10-2019, 10:38 AM
You need to take it to an expert like a trailer alignment shop. There is just no way you can check it without the proper equipment.

Also welcome to the forum.
I agree with Wayne, you just can't tell without the proper equipment. Axle can be perfect but spindle or even the wheel might be bent.

ChuckS
01-10-2019, 11:14 AM
Only two problems tha5 Iím aware of will cause tire to wear on inside rig only...

Camber of that axle is not in spec...they come pre bent from factory with X amount of camber

If the wheel bearing on that wheel has an issue ...not properly torqued or greased it will also cause this issue..

Also you could take a laser level ... very inexpensive.. and place at center of that axle with laser beam resting just on bottom edge of axle...

Look at the laser beam from side to side and see if it hits the bottom edge across from center out at each wheel... if camber is way out you MAY see a variance but not certain.

RV6A
01-10-2019, 03:04 PM
You need to take it to an expert like a trailer alignment shop. There is just no way you can check it without the proper equipment.

Also welcome to the forum.

This is not correct. With a level, string and tape measure I have aligned many a front end on a car. A trailer is much easier since the castor does not have to be measured or changed. Granted changing camber can be a pain on a solid axle on a trailer but not impossible with the right tools. The "Proper Equipment" makes it easier, but for the DIY "Gear Head" quality alignments are easily attained.

From what the OP posted, everything lines up as it should. I would check how level the ride is, loading of the unit, etc. I think he still needs a string to check alignment with the tow vehicle.

I purchased my 2009 used 3 years ago and it still had the original tires. The passenger side rear tire was worn severely on the inside. This concerned me greatly so I pulled out my camber/castor gauge and string and check the alignment and found nothing out of spec. I put four new Sailun tires on the ground and one as a spare. 10K later no discernible wear can be seen on the tires.

Montana Man
01-10-2019, 10:04 PM
Putting a level on a tire would work if rubber tires were precise in their shapes. They are not. I had the same wear on my monty and took it to a truck alignment shop. They bent the axle back to spec and problem fixed.

Hblick48
01-10-2019, 10:54 PM
You might have a weak leaf spring. I wore out a set of tires in one 8,000 mile trip. All were so worn on the inside that towards the end of that trip, We stopped at Les Schwab in Toolee, Utah and had them flip the tires so the worn part was on the outside. They were nice enough to let us boondock under their awning that night.

Turns out that my rig had two 6,000 pound axles with 2,500 pound leaf springs. Every time the rig bounced, the axle flexed and produced positive caster which wore out the inside of the tires. I replaced the springs with 3,000 pound ones (one extra leaf) and put on new tires.

Just completed 9,100 mile trip and tires still look new. I tracked tread depth on sides and middle of tires at start, mid, and end of trip. Tires wore evenly.

I also did the hillbilly alignment using a straight edge, level, chain, and bottle jack. Right side was way out, bent axle with chain and jack and got it aligned.

BiigDaddy
01-11-2019, 04:25 AM
I also did the hillbilly alignment using a straight edge, level, chain, and bottle jack. Right side was way out, bent axle with chain and jack and got it aligned.

I had my driver side rear tire completely bald on the inside after my trip from Florida back to Michigan. I did exactly as Hblick did with a hillbilly alignment, put on a new Sailun tire, and its been great ever since....

mazboy
01-11-2019, 06:26 AM
get an alignment.

Deb & Kenís Hoppy
01-13-2019, 02:13 PM
Thanks for all of the feedback. Anyone have the process for the hillbilly alignment?

Hblick48
01-13-2019, 02:22 PM
Try
Https://youtu.be/pRyTeqYuGBk

Montana Man
01-13-2019, 02:42 PM
Thanks for all of the feedback. Anyone have the process for the hillbilly alignment?

In the owners manual right next to how to duct tape a broken black tank.

Hblick48
01-13-2019, 04:50 PM
Here is a better video. https://youtu.be/H3tbsnVKxjU

First place a straight edge across face of tires, around mid point. All 4 tires should touch the straight edge. If one (or more) points have a space, the axle is bent. My right front was out over one quarter inch. Used a 30 ton Harbor Freight bottle jack and chain. Has to do the right front twice and the right rear once to get it right. Then check the vertical alignment with a level. Should be slightly "bubble out."

Like I said in an earlier post, it worked for me.

K0LCB
01-13-2019, 05:33 PM
Did you measure distance between tires on each side?

waynemoore
01-13-2019, 06:01 PM
I just don’t understand? My Montana is part of the family and I want it to have the best care possible. Just like the TV it gets the best of care, all the required maintenance is done on time.

I know how to do a lot of thing myself on the TV and rig. But I am no expert and I just don’t have to Proper equipment or facilities to do do it correctly.

I want an expert doing that type of work on my baby. Plus I spent far to much money to be messing around with it myself.

Hblick48
01-13-2019, 06:33 PM
KOLCB..I didn't measure anything. Waynemore..I've been wrenching on cars for over 50 years. I hate to pay someone for something I can still do myself.

My hillbilly alignment was successful. In fact I just finished installing new brakes and drums on the Montana. Have the parts to replace brakes on TV.

However, TV developed a transmission problem midway through our last trip. I thought that if I needed a rebuilt one, I'd attempt to do it myself. If I were 20 years younger, I would attempt it, but now that repair is beyond me at this point in my life. Going to a Powerstroke Specialist for that one.

bigred715
01-15-2019, 04:24 PM
Most likely alignment. Take it to shop that can do alignments on big rigs and trailer.They have to bend axle to align. None of these trailers come aligned fro factory.

vipermanden
01-16-2019, 01:47 PM
I had the same thing happen to my driver side rear tire. Took it to a truck alignment shop, and he instantly showed me what was wrong. Those yellow octagon plates on the front and back of the leaf spring, have a grease fitting, and they all should be lined up and be at the 6 o'clock position. Apparently the factory did not tighten those bolts to 75 ft. pounds and that bolt came loose and the octagon spun bending one of the side rails that are supposed to keep it from spinning. So now before every trip, I make sure those yellow octagon plates have not rotated. So the truck guy had to take off everything and bend the side rail back into position and rotate the octagon to the right position and he measured the axles and they were good to go. I then got 20,000 more miles on my remaining tires and the new one I put there. So just do a quick check and make sure those octagon plates have not moved. and those 4 bolts are 75 ft. pounds

prndl
01-16-2019, 02:41 PM
This happened to my friends Montana Mountaineer on the rear axle.
He had broken a leaf spring center pin and the axle had shifted back about two inches on one side. Probably when he hooked a curb somewhere.

bearstop
01-16-2019, 04:57 PM
Hello, new member here. I've learned a lot from your posts and thank you.
I discovered the street side rear tire on our 2009 2980RL was completely bald just on the inside of the tire. The other three tires were fine and all four were new with only 8000 miles. The first thing I heard from others was it must be a bent axle. So, I put a level on the tire - perfectly plumb! I put a straight edge to the two axles - no deviation. I spun the wheel when it was off the ground - no wobble. I check the pressure before each trip.
I'm stumped! does anyone have some insight into what could be going on?
Thanks in advance.


I had the same problem and it turned out that although the other three tires were okay both axles were bent. They are made with a bend but mine were way out of whack. Have your RV dealer check the axles.


Bearstop

prndl
01-16-2019, 05:28 PM
Im not really doubting the bent axle reports but, can you possibly imagine what kind of torque or "moment" in engineering terms it takes to bend a three inch metal tube three feet away from the fulcrum point pressing on a point only 10-12" away from the other side of the fulcrum point.

Okie-Dokie
01-17-2019, 06:45 AM
Had wear on curbside tire after mobile service checked and repacked the bearings. Didn't watch the entire procedure so don't know if they torqued after. could not tell if there was abnormal wear on opposite tire but took it to CW and had alignment checked. Within specs so went back on the road. No further problems so can only conclude that not being properly torqued can cause this type of abnormal wear although I would expect it to create a wobble or wavy pattern.

MrMeeks
01-17-2019, 07:12 AM
I'm having the same tire wear problem on my 2008 2955 RL. Already replaced one axle and now the other axle shows tire wear problems. Repair shop couldn't find any problem with the axle. I will go back and have the leaf springs checked to see if they can support those 6k axles. Thanks to all!

ChuckS
01-17-2019, 08:19 AM
Iíd venture that some of the tire wear issues folks are having is caused by...
.. wrong air pressure for load
.. suspension hasnít been routinely lubed...
***If itís not a wet volt system it needs to be and Iíd correct that before anything else
.. wheel bearing issue on tire with wear.. either too loose and or failing
.. broken spring or worn out leaf spring hangers due to lack of lubrication or extreme angle during backing

... yellow plates will not be on all suspension systems.will depend on year of the RV and whether it has the ďcorrect trackĒ installed.. not all do... mine doesnít

margerush
01-18-2019, 05:46 AM
Our brand new 2016 3160RL had little to NO grease in all of the zerk fittings. So now before every trip, hubby pumps grease in all zerk fittings & greases the wheel bearings. Two yr old tires seem to be wearing evenly.

MrMeeks
01-26-2019, 09:35 AM
Just curious. Have same problem but can't convince any service advisor that leaf springs could be the issue. Already had one axle replaced 3 years ago. Trying again this week. I found leaf springs at e-trailer with 6 leafs. Existing ones on trailer have 5. How did you know how old springs were for 5k axle?

Hblick48
01-26-2019, 10:14 AM
Just curious. Have same problem but can't convince any service advisor that leaf springs could be the issue. Already had one axle replaced 3 years ago. Trying again this week. I found leaf springs at e-trailer with 6 leafs. Existing ones on trailer have 5. How did you know how old springs were for 5k axle?

If you look at my post #7 above, it explains why the tires wear on the inside due to weak or under rated springs. I bought the 3,000 lb springs from Etrailer after I posed a question on their website. One of their technicians suggested the heavier springs. Number of leafs indicate the weight rating. 3,000 pound one had one extra leaf.

It definitely was NOT the axle. While I had the them off the ground with no load, they had a slight upward bow just like they're supposed to have.

On 2 occasions on prior trips, the factory original 2,500 pound springs actually broke close to the shackle. Each time we were able to get to a shop to replace the spring...had to go with 2,500 pound ones since all 4 needed to be the same. I now have 2 almost new springs in my "spare parts bin" since they were replaced during the upgrade.

Note that all 4 of my tires wore heavily on the inside edge. The left side was perfectly aligned, I only had to align the right side.

The heavier springs absolutely solved the inside edge wearing problem.

PSFORD99
01-26-2019, 10:40 AM
If you look at my post #7 above, it explains why the tires wear on the inside due to weak or under rated springs. I bought the 3,000 lb springs from Etrailer after I posed a question on their website. One of their technicians suggested the heavier springs. Number of leafs indicate the weight rating. 3,000 pound one had one extra leaf.

It definitely was NOT the axle. While I had the them off the ground with no load, they had a slight upward bow just like they're supposed to have.

On 2 occasions on prior trips, the factory original 2,500 pound springs actually broke close to the shackle. Each time we were able to get to a shop to replace the spring...had to go with 2,500 pound ones since all 4 needed to be the same. I now have 2 almost new springs in my "spare parts bin" since they were replaced during the upgrade.

Note that all 4 of my tires wore heavily on the inside edge. The left side was perfectly aligned, I only had to align the right side.

The heavier springs absolutely solved the inside edge wearing problem.

I agree, although a friends brand new Montana fifth wheel with the 7K axles had terrible outside tire wear with very little miles. My advice to him was get it aligned, he did, and the alignment was bad from the factory. He replaced the worn tires with some new Sailuns and no further tire issues, this has been three years so far . It can be just alignment, but as you pointed out, it can be other issues .

If shackles , leafs etc are looking okay, alignment would be my first check.

Hblick48
01-26-2019, 10:49 AM
I agree, although a friends brand new Montana fifth wheel with the 7K axles had terrible outside tire wear with very little miles. My advice to him was get it aligned, he did, and the alignment was bad from the factory. He replaced the worn tires with some new Sailuns and no further tire issues, this has been three years so far . It can be just alignment, but as you pointed out, it can be other issues .

If shackles , leafs etc are looking okay, alignment would be my first check.

I have read many threads on this forum stating that Keystone (and probably all trailer mfg) do not align as part of the manufacturing process.

If I were to buy a brand new rig, I would insist that the dealer align pre delivery. No alignment No purchase.

PSFORD99
01-26-2019, 11:25 AM
I have read many threads on this forum stating that Keystone (and probably all trailer mfg) do not align as part of the manufacturing process.

If I were to buy a brand new rig, I would insist that the dealer align pre delivery. No alignment No purchase.


I think you make a good point, I fabricated a set of braces, copied from the MorRyde X factor, although I didn't have any tire or axle issues at the time, along with the MorRyde wet bolt kit. 11years and not a problem with my suspension or tires.

I am on my third set of tires, got the OE's off after a couple years, went to the overrated G614's , only decent tire at the time, they aged out, now running the Sailun S637's, highly recommended .