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01-12-2003, 03:00 PM
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#1
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2 Rivet Member
Join Date: Jan 2003
Posts: 29
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Is a bent axle a "dead" axle??
When checking out my "new" '76 Sovereign before purchase, I noticed one of the axles is bent "up" in the center. (To within 2-3" of the belly if memory serves me) The torsion arms still have plenty of negative angle and both look similarly loaded on each side.
Will the bent axle funtion as originally designed? Can it/should it be rebuilt/straightened?
We're not planning on major travel with the new AS, just to and from the hunting club 100 miles each way once a year. This is NOT to imply I want to shirk any safety responsibilities, this is just for a frame of reference.
Thanks for any input!
__________________
Jason
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01-12-2003, 03:12 PM
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#2
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Rivet Master
Austin
, Texas
Join Date: Oct 2002
Posts: 949
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I have noticed the same thing on my Overlander which has good axles as far as I have been able to discern. I have seen bad axles with the same upward bend in the tube so I really don't know what causes it. It could be that way from the factory to get the necessary camber degree ? Any other ideas?
Chas
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01-12-2003, 04:54 PM
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#3
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Moderator Emeritus
1972 31' Sovereign
High Springs
, Florida
Join Date: May 2002
Posts: 2,311
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It's Normal
But, did you say only 1 of the axles have a bend? Below is a picture of a new axle, with a 2X4 across the bottom. I measured the gap at 5/16". The board was not quite the length of the entire axle, so that measurment may not be entirely accurate.
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
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01-12-2003, 05:03 PM
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#4
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2 Rivet Member
Join Date: Jan 2003
Posts: 29
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Unfortunately, she's about an hour away or I'd post a photo. I'll have to look again to confirm, but Yes as far as I can remember. Only one is noticebly bent up.
Thanks!
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Jason
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01-12-2003, 05:24 PM
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#5
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2 Rivet Member
Join Date: Jan 2003
Posts: 60
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2x4
the 2x4 your using to check the axel is it straight?
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01-12-2003, 07:07 PM
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#6
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3 Rivet Member
1972 31' Sovereign
, Ohio
Join Date: Sep 2002
Posts: 229
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Yes they are all bent up at the center like that.. brand new or old..
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JP
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01-13-2003, 09:00 AM
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#7
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Join Date: Sep 2002
Posts: 222
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JPAIRSTREAM wrote:
Quote:
Yes they are all bent up at the center like that.. brand new or old..
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WHY ??
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01-13-2003, 10:10 AM
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#8
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Contributing Member
2018 Interstate Grand Tour Ext
Austin (Hays County)
, Texas
Join Date: Jun 2002
Posts: 7,164
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Bend in axle
The bend sets the camber of the tires. Camber is the angle of the axle shaft to the ground. The axles have a positive camber.
__________________
John W. Irwin
2018 Interstate GT, "Sabre-Dog V"
WBCCI #9632
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01-13-2003, 01:50 PM
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#9
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2 Rivet Member
Join Date: Jan 2003
Posts: 29
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Makes sense! I'll have to look again but I only remember one being noticeably bent, although the other may have been slightly bent. Maybe the different axles required a different bend??
I should be going back up to check on her within the next couple of weeks, and I'll try to remember to take my camera... (I'll also look at the camber of the wheels, if it's a serious problem it might even be noticable...)
Thanks again!!
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Jason
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12-11-2007, 10:33 PM
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#10
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1 Rivet Member
1968 26' Overlander
Stevensville/Fort Fun
, Montana
Join Date: Dec 2007
Posts: 13
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Axle bent up
I have noticed the same thing on my 68 overlander. I have also seen it on many other trailers , including my boat trailer, so I think it is normal.
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12-11-2007, 11:10 PM
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#11
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by Jason1101
When checking out my "new" '76 Sovereign before purchase, I noticed one of the axles is bent "up" in the center. (To within 2-3" of the belly if memory serves me) The torsion arms still have plenty of negative angle and both look similarly loaded on each side.
Will the bent axle funtion as originally designed? Can it/should it be rebuilt/straightened?
We're not planning on major travel with the new AS, just to and from the hunting club 100 miles each way once a year. This is NOT to imply I want to shirk any safety responsibilities, this is just for a frame of reference.
Thanks for any input!
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A properly aligned "torsion" axle, will have the square tube bent upwards in the middle, or very close to it. That bend alters the caster camber. The correct caster camber is 3/4 degrees, plus or minus 3/4 degree. That means the bottom of the tires should be closer together than the top of the tires, from side to side of the trailer.
If the square axle tube does not have a bend, then that axle is not properly aligned.
The axle tube is also slightly bent rearward, to achieve proper "toe in." Proper toe in is 1/8 inch, plus or minus 1/8 inch. However, a zero toe in on one side and a 1/4 toe in on the other side, is not acceptable. All the toe ins should be the same, for proper tire wear.
Andy
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12-12-2007, 04:40 AM
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#12
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Rivet Master
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg
, Illinois
Join Date: Jul 2005
Posts: 2,944
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This is a very old thread but Andy's reply is dead on. However, I have never seen a 2x4 used to measure it. The 2x4 would have to be very straight. A 6 foot metal level that is really straight would be better but assumes there is no bending of the arms or spindle of the axle to mess up the chamber. A better suggestion (if no Airstream dealer were not available) would be to take the unit to a truck alignment shop that has the proper equipment to directly measure the camber using the chamber gauge which is placed directly on the rims of the tires.
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