likesadvice wrote:
John -
The first tire to show excessive wear was the door side rear. I replaced this tire with a new bias ply.
The next tire to show excessive wear was the slide side front. I replaced this tire with my spare.
The next tire to show excessive wear was the door side front. At this point I'd had enough. I couldn't drive the interstates in the North Dakota oil patch with another tire having the tread wore off one side. All tires were showing some irregular wear. I wasn't about to put on another bias ply. I had the tire shop put on 4 new steel belted radials and kept the first purchased bias ply as a spare.
The technician said the manufacturer made a mistake and improperly measured the placement for the spring hanger from the edge of the next spring hanger, rather than measuring from the previous spring hangers center hole.
I'm not signing anything until the alignment is checked. Thanks for the help.
Hi likesadvice,
Thanks for the good words in your other reply. Hopefully my learning experience on messed up trailer running gear alignment can help someone....
Did you by chance know which hanger the tech moved? And did he move more than one?
Your description on tire wear and that the tech had to move a hanger, points to the thrust angle of the front axle being wrong. And then the rear axle not parallel to the front.
In the day of mass production welded fabrication, it makes the most sense the hangers are placed in a weld jig to hold location and they use the bolt hole to create all 6 hangers in the correct relationship to each other. Then create the correct relationship to the tow ball before tach welding the hangers in location to later full weld out.
However that is me thinking how I would do it, not necessarily how your frame builder does it. My goodness, if they are measuring every hanger to be in location and tweaking, the room for error can go up big time. That said, my hangers where welded on wrong too. They could not have been using a jig or if they did, it had human error in the middle of it. And this is no QC to check the final outcome before shipping.
A few things to note.
You started out with bias tires, had extreme wear. Then changed to radials and you reported a white knuckle experience, Did the bias tires have the white knuckle experience too?
With the front axle being way off in relation to the tow ball (out of square to the centerline of the trailer,) the camper can do what they call "dog tracking". The trailer is not puling straight true behind the truck, it is pulling on an angle as the front axle is steering to the left or right. When you switched to radials, the side walls of the tire may have had more flex then the bias. That flex in this dog tracking condition I can see it creating a tail wagging experience.
My camper did not dog track, but I was also using a Reese DC as my anti-sway control and I have a 1 ton truck as a TV, so the heavier truck and hitch is more rigid and possibly mine was not out as bad as yours. This may have helped hold the trailer more central but the thrust angle being wrong just plain scrubbed off tire wear at an accelerated rate.
Did you have the TT tires aired up to may side wall cold pressure? This should be done even with good alignment. If the tires are down in air, and the trailer dog tracking, the softer tire for sure could aggravate a white knuckle ride
Hope this helps
John