Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-19-2009, 01:18 PM   #1
Rivet Master
 
Zeppelinium's Avatar

 
1975 31' Sovereign
1973 27' Overlander
1977 23' Safari
Palmer Lake , Colorado
Join Date: Oct 2005
Posts: 3,908
Send a message via Skype™ to Zeppelinium
Fixing tread separation damage

This is not fun, especially if it happens when you're far from home. I should have replaced the tires on the Overlander, since it had been in "dry dock" for about 4 years, but they looked so good...

The tire tread failed just outside Idaho Falls. The core still held pressure, so getting to town at low speed didn't require putting on the spare. Commercial Tires didn't have any bias ply 7.00/15s in stock, so they suggested radial 225/75R15 as a close replacement. They even mounted one and did a trial fit, just to make sure. I couldn't tell the difference, so I replaced all 4.

When the tread comes off, you get two kinds of damage. First, the skin is not closely trimmed to the front outrigger, so the tread beats it down and generally cracks the skin for several inches. This is cosmetic damage. The other damage is the inner plastic whell well liner get cracked and usually gets torn away from the shell, allowing pink fiberglass to hang down and allowing the liner to rub on the tire(s).

Click image for larger version

Name:	IMG_0259 field repair-s.jpg
Views:	381
Size:	152.0 KB
ID:	89333 Click image for larger version

Name:	IMG_0279 trim edge-s.jpg
Views:	551
Size:	100.7 KB
ID:	89334

After getting new tires, the first order of busines was to stop the loss of insulation and get the liner off the tires. The spring clamps in the above photo worked fine--even drove about 40 miles using only the clamps (4 of them) to hold the plaster liner to the shell.

To fix the skin I cut away most of the bent aluminum and drilled a few stress relief holes where the cracks seemed to be headed. The next step was cutting a patch and a length of 3/4" L-extrusion to hold the edge of the patch firmly against the outrigger. The vertical web of the extrusion was placed between the existing rub panel and the outrigger, so that there is no edge for any future separated tread to hit/grab.

Click image for larger version

Name:	IMG_0288 trimmed skin-s.jpg
Views:	299
Size:	116.2 KB
ID:	89335

Click image for larger version

Name:	IMG_0307 finished patch-s.jpg
Views:	313
Size:	121.3 KB
ID:	89336 Click image for larger version

Name:	IMG_0297 rub plate-s.jpg
Views:	387
Size:	155.3 KB
ID:	89337

Trimming the banana skin back to the edge of the outrigger required the skin at the front of the wheel well to be trimmed and re-faired. Make sure you get the trim back on. Otherwise, you have a sharp edge that will be a hazard the next time the wheels are removed.

Click image for larger version

Name:	IMG_0298 finished skin-s.jpg
Views:	290
Size:	109.6 KB
ID:	89339 Click image for larger version

Name:	IMG_0287 outer edge-s.jpg
Views:	322
Size:	240.7 KB
ID:	89338

The outer end of the L-extrusion needed a small amount of curve to fit the outrigger (thanks, shrinker tool). A little additional persusion from a plastic mallet got it fitting tight. You can't see the repair unless you get your eye level down below the axle mounting plate.

Reattaching the liner to the skin is a big problem. The liner doesn't have a lot of extra margin along the edge to allow easily riveting it back in place. In addition, if you don't have rivet washers or some long piece of thin aluminum to act as backing, the rivets probably won't hold. Fortunately there was a metal dealer near the tire shop who had 12' x 1-1/2" x 1/8 pieces of aluminum in stock and Lowe's had a box of LONG, I should say VERY LONG, pop rivets. You need a rivet with almost 1/2" grip to hold the skin, plastic, and backing. I installed the inside "rail" as an emergency repair and waited to do the cracks until I was home and had the shop handy.

I don't know if this is a good repair or not. Without access to the back of the plastic, there is no way to put a washer on the rivets. Will they hold and will the plastic tolerate them? And will the Vulkem provide a seal? Don't know, only time will tell.

Click image for larger version

Name:	IMG_0290 cleco-s.jpg
Views:	293
Size:	127.1 KB
ID:	89340 Click image for larger version

Name:	IMG_0295 curved edge-s.jpg
Views:	285
Size:	129.9 KB
ID:	89341

Forming the patches takes a bit of time if the cracks require patching up in the curve. This is particularly true if the crack is in the front radius, where a compound curve is required. All I can say is, you have to shrink the edge of the metal for the new patch before you put the bend in it. How much shrinking (thanks again, shrinker tool) and how much bending is pure esitimation, but I managed to luck out on the first try.

Click image for larger version

Name:	IMG_0296 installed plates-s.jpg
Views:	289
Size:	119.2 KB
ID:	89342

What's the bottom line, here? Check your wheel wells for two things. First, see if your banana skin is trimmed so that a tread can't rip it. Second, the liner cracks probably exist, even if you haven't had a tread separation. Run your hand along the liners to check them. Most of the cracks (all of the ones I've experienced) are in the outboard wall of the liners, so you can easily feel along that surface to find them.

Zep
__________________

Zeppelinium is offline   Reply With Quote
Old 10-19-2009, 01:51 PM   #2
Site Team
 
azflycaster's Avatar
 
1975 25' Tradewind
Dewey , Arizona
Join Date: Mar 2005
Posts: 12,127
Images: 62
Blog Entries: 1
I had the same issue with a bias tire that was very old a few years ago. I noticed the spray of rubber from the wheel well and stopped right away. The only damage I had was the trim piece in front of the wheel has separated from the well. A couple of rivets later it was as good as new.

I lucked out on the tire we noticed when we were with you two weeks a go. I replaced the tire in Fort Collins with another brand and then replaced it with the same brand (Tow master) when I returned home. It seems tires are regional. What they could not find in any Colorado Discount Tire was in stock at my Discount Tire store in Phoenix.

Here is a picture of the old bad tire and another of Roger helping change the more recent bad tire.
Attached Thumbnails
Click image for larger version

Name:	IMG_1376.jpg
Views:	131
Size:	289.8 KB
ID:	89346   Click image for larger version

Name:	IMG_0197.jpg
Views:	140
Size:	763.7 KB
ID:	89347  

__________________

__________________

Richard

Wally Byam Airstream Club 7513
azflycaster is offline   Reply With Quote
Old 10-19-2009, 03:27 PM   #3
Rivet Master
 
Melody Ranch's Avatar
 
1956 22' Flying Cloud
1953 32' Liner
1955 22' Safari
Valley View , Texas
Join Date: Jan 2006
Posts: 3,960
Images: 78
Send a message via Skype™ to Melody Ranch
Ready for the road

Roger....looks like you were ready for anything on the road with you tool boxes full. I feel funny having my truck bed tool box loaded with tools and materials for the unexpected. I hope I never have to use the hack saw and metel snips. Duct tape? Is there any question about its use?

As usual...a great job.
__________________
Melody Ranch is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Goodyear Marathon tread separation ... and our solution RossFam05BH Tires 226 06-26-2010 11:27 AM
Dual Marathon Tread Separation - AGAIN gklott Tires 12 10-17-2008 11:14 AM
Maxxis Tire Tread Separation Al - K4GLU Tires 44 07-26-2008 09:10 PM
Bathroom water damage? Worth fixing? Curtis-79MH 1966-68 Caravel 3 09-12-2006 11:55 AM
Underside damage truck tire tread - 2004 Classic gklott 2001 - 2005 Classic 1 06-11-2004 09:15 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:25 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.