"jamesgangnc" wrote in message
...
On Jul 6, 1:44 pm, "Harold" wrote:
"jamesgangnc" wrote in message

...

My last set of tires wore away completely on the insides long before
the rest of the tread was gone. I was talking to one of my buddies
and he had the same problem. I'm thinking the axle develops a bow in
it. So earlier this spring I left the floor jack under the middle of
it with it jacked up some. Too early to tell if the new tires are
wearing the same or not. Can't measure the distance between them at
the top and bottom cause the street and the boat are in the way so I
don't know if the camber is ok now or not. Anyone else have this
problem and do any investigating?

4 things to check

1 tires- Carlisles are junk. Goodyear Marathons seem to be pretty good
2 camber- Slight negative camber is good (slight upward bend in axle)
3 toe- A little toe in is good. Toe out scrubbs inside of tires and may
cause wandering.
4 tracking- axle is perpendicular to direction of travel

You can measure or observe all of these conditions.

I'm thinking my wear pattern rules out 1 and 4. Both sides wore out
on the inside. But more importantly I have a 2" square tube axle so
how do I change 2 or 3 if that might be my problem? And I can't say
that I have been bothered by any wandering.

Camber and toe in are best adjusted by an axle shop. It requires bending the
axle.
You can check by raising the tires off the ground spin the tires and make a
scribe mark on the treads all the way around. The scribe must be stationary
while you are doing this.

Measure the distance between marks top and bottom. The difference is camber.
Measure the distance between marks front and back. The distance is toe.
0 to 1/4in is good for toe in. I'm not exactly sure about camber but there
should be some negative camber.

On Jul 6, 2:30*pm, "Harold" wrote:
"jamesgangnc" wrote in message

...
On Jul 6, 1:44 pm, "Harold" wrote:





"jamesgangnc" wrote in message

....

My last set of tires wore away completely on the insides long before
the rest of the tread was gone. I was talking to one of my buddies
and he had the same problem. I'm thinking the axle develops a bow in
it. So earlier this spring I left the floor jack under the middle of
it with it jacked up some. Too early to tell if the new tires are
wearing the same or not. Can't measure the distance between them at
the top and bottom cause the street and the boat are in the way so I
don't know if the camber is ok now or not. Anyone else have this
problem and do any investigating?

4 things to check

1 tires- Carlisles are junk. Goodyear Marathons seem to be pretty good
2 camber- Slight negative camber is good (slight upward bend in axle)
3 toe- A little toe in is good. Toe out scrubbs inside of tires and may
cause wandering.
4 tracking- axle is perpendicular to direction of travel

You can measure or observe all of these conditions.

I'm thinking my wear pattern rules out 1 and 4. *Both sides wore out
on the inside. *But more importantly I have a 2" square tube axle so
how do I change 2 or 3 if that might be my problem? *And I can't say
that I have been bothered by any wandering.

Camber and toe in are best adjusted by an axle shop. It requires bending the
axle.
You can check by raising the tires off the ground spin the tires and make a
scribe mark on the treads all the way around. The scribe must be stationary
while you are doing this.

Measure the distance between marks top and bottom. The difference is camber.
Measure the distance between marks front and back. The distance is toe.
0 to 1/4in is good for toe in. I'm not exactly sure about camber but there
should be some negative camber.- Hide quoted text -

- Show quoted text -

How do they "bend" an axle?

"jamesgangnc" wrote in message
...
On Jul 6, 2:30 pm, "Harold" wrote:
"jamesgangnc" wrote in message

...
On Jul 6, 1:44 pm, "Harold" wrote:





"jamesgangnc" wrote in message

...

My last set of tires wore away completely on the insides long before
the rest of the tread was gone. I was talking to one of my buddies
and he had the same problem. I'm thinking the axle develops a bow in
it. So earlier this spring I left the floor jack under the middle of
it with it jacked up some. Too early to tell if the new tires are
wearing the same or not. Can't measure the distance between them at
the top and bottom cause the street and the boat are in the way so I
don't know if the camber is ok now or not. Anyone else have this
problem and do any investigating?

4 things to check

1 tires- Carlisles are junk. Goodyear Marathons seem to be pretty good
2 camber- Slight negative camber is good (slight upward bend in axle)
3 toe- A little toe in is good. Toe out scrubbs inside of tires and may
cause wandering.
4 tracking- axle is perpendicular to direction of travel

You can measure or observe all of these conditions.

I'm thinking my wear pattern rules out 1 and 4. Both sides wore out
on the inside. But more importantly I have a 2" square tube axle so
how do I change 2 or 3 if that might be my problem? And I can't say
that I have been bothered by any wandering.

Camber and toe in are best adjusted by an axle shop. It requires bending
the
axle.
You can check by raising the tires off the ground spin the tires and make
a
scribe mark on the treads all the way around. The scribe must be
stationary
while you are doing this.

Measure the distance between marks top and bottom. The difference is
camber.
Measure the distance between marks front and back. The distance is toe.
0 to 1/4in is good for toe in. I'm not exactly sure about camber but there
should be some negative camber.- Hide quoted text -

- Show quoted text -

How do they "bend" an axle?

With an axle bending tool of course.

"jamesgangnc" wrote in message
...
On Jul 6, 2:30 pm, "Harold" wrote:
"jamesgangnc" wrote in message

...
On Jul 6, 1:44 pm, "Harold" wrote:





"jamesgangnc" wrote in message

...

My last set of tires wore away completely on the insides long before
the rest of the tread was gone. I was talking to one of my buddies
and he had the same problem. I'm thinking the axle develops a bow in
it. So earlier this spring I left the floor jack under the middle of
it with it jacked up some. Too early to tell if the new tires are
wearing the same or not. Can't measure the distance between them at
the top and bottom cause the street and the boat are in the way so I
don't know if the camber is ok now or not. Anyone else have this
problem and do any investigating?

4 things to check

1 tires- Carlisles are junk. Goodyear Marathons seem to be pretty good
2 camber- Slight negative camber is good (slight upward bend in axle)
3 toe- A little toe in is good. Toe out scrubbs inside of tires and may
cause wandering.
4 tracking- axle is perpendicular to direction of travel

You can measure or observe all of these conditions.

I'm thinking my wear pattern rules out 1 and 4. Both sides wore out
on the inside. But more importantly I have a 2" square tube axle so
how do I change 2 or 3 if that might be my problem? And I can't say
that I have been bothered by any wandering.

Camber and toe in are best adjusted by an axle shop. It requires bending
the
axle.
You can check by raising the tires off the ground spin the tires and make
a
scribe mark on the treads all the way around. The scribe must be
stationary
while you are doing this.

Measure the distance between marks top and bottom. The difference is
camber.
Measure the distance between marks front and back. The distance is toe.
0 to 1/4in is good for toe in. I'm not exactly sure about camber but there
should be some negative camber.- Hide quoted text -

- Show quoted text -

How do they "bend" an axle?

Brute force. :) You can check camber with a framing square on flat
ground.

On Jul 7, 1:42*am, "Bill McKee" wrote:
"jamesgangnc" wrote in message

...
On Jul 6, 2:30 pm, "Harold" wrote:





"jamesgangnc" wrote in message

...
On Jul 6, 1:44 pm, "Harold" wrote:

"jamesgangnc" wrote in message

....

My last set of tires wore away completely on the insides long before
the rest of the tread was gone. I was talking to one of my buddies
and he had the same problem. I'm thinking the axle develops a bow in
it. So earlier this spring I left the floor jack under the middle of
it with it jacked up some. Too early to tell if the new tires are
wearing the same or not. Can't measure the distance between them at
the top and bottom cause the street and the boat are in the way so I
don't know if the camber is ok now or not. Anyone else have this
problem and do any investigating?

4 things to check

1 tires- Carlisles are junk. Goodyear Marathons seem to be pretty good
2 camber- Slight negative camber is good (slight upward bend in axle)
3 toe- A little toe in is good. Toe out scrubbs inside of tires and may
cause wandering.
4 tracking- axle is perpendicular to direction of travel

You can measure or observe all of these conditions.

I'm thinking my wear pattern rules out 1 and 4. Both sides wore out
on the inside. But more importantly I have a 2" square tube axle so
how do I change 2 or 3 if that might be my problem? And I can't say
that I have been bothered by any wandering.

Camber and toe in are best adjusted by an axle shop. It requires bending
the
axle.
You can check by raising the tires off the ground spin the tires and make
a
scribe mark on the treads all the way around. The scribe must be
stationary
while you are doing this.

Measure the distance between marks top and bottom. The difference is
camber.
Measure the distance between marks front and back. The distance is toe.
0 to 1/4in is good for toe in. I'm not exactly sure about camber but there
should be some negative camber.- Hide quoted text -

- Show quoted text -

How do they "bend" an axle?

Brute force. *:) *You can check camber with a framing square on flat
ground.- Hide quoted text -

- Show quoted text -

I'm thinking that it's just sagged over the years till it has negative
camber. That seems to be the most logical explanation since I have
the same wear problem on both sides. A bent axle would not likely be
bent symetrically. Nor does it seem reasonable that the toe would
change on both sides.

Question is will my parking it with a floor jack under the center bent
it back over time. Also seems that it would be better to store over
the winter with jack stands under the frame.

On Wed, 7 Jul 2010 04:40:31 -0700 (PDT), jamesgangnc
wrote:

I'm thinking that it's just sagged over the years till it has negative
camber. That seems to be the most logical explanation since I have
the same wear problem on both sides. A bent axle would not likely be
bent symetrically. Nor does it seem reasonable that the toe would
change on both sides.

It is not going to break. The yield point is a substantial percentage
of the stress at which it would break. It it bends sitting, it would
break the first time you hit a bump.

Question is will my parking it with a floor jack under the center bent
it back over time.

No. See above.

Also seems that it would be better to store over the winter with jack stands.

Easier on tires. THe steel doesn't care.

Casady

On Jul 7, 8:50*am, Richard Casady wrote:
On Wed, 7 Jul 2010 04:40:31 -0700 (PDT), jamesgangnc

wrote:
I'm thinking that it's just sagged over the years till it has negative
camber. *That seems to be the most logical explanation since I have
the same wear problem on both sides. *A bent axle would not likely be
bent symetrically. *Nor does it seem reasonable that the toe would
change on both sides.

It is not going to break. The yield point is a substantial percentage
of the stress at which it would break. It it bends sitting, it would
break the first time you hit a bump.



Question is will my parking it with a floor jack under the center bent
it back over time.

No. See above.


Really? Cause it bows up about 3" in the center when I lift the
entire trailer and boat from the center of the axle with the floor
jack. You're saying that doesn't matter, that's not enough to bend it
any. Even if I do this for cummulative months?

On Wed, 7 Jul 2010 06:46:03 -0700 (PDT), jamesgangnc
wrote:

On Jul 7, 8:50*am, Richard Casady wrote:
On Wed, 7 Jul 2010 04:40:31 -0700 (PDT), jamesgangnc

wrote:
I'm thinking that it's just sagged over the years till it has negative
camber. *That seems to be the most logical explanation since I have
the same wear problem on both sides. *A bent axle would not likely be
bent symetrically. *Nor does it seem reasonable that the toe would
change on both sides.

It is not going to break. The yield point is a substantial percentage
of the stress at which it would break. It it bends sitting, it would
break the first time you hit a bump.



Question is will my parking it with a floor jack under the center bent
it back over time.

No. See above.


Really? Cause it bows up about 3" in the center when I lift the
entire trailer and boat from the center of the axle with the floor
jack. You're saying that doesn't matter, that's not enough to bend it
any. Even if I do this for cummulative months?

Consider buildings, water towers, bridges. They are loaded initially,
and bend at that time. They then stay elastically bent forever,
without any permanent deformation. Things are not designed so weak
that they are loaded too near the breaking point and take up a
permanent set, creep is a word for it. Something like an axle will
break the first time you hit a bump if it has already been loaded to
the yield point just sitting there. To digress, brittle materials
cannot be permanently bent. That is what brittle means. Those Roman
stacked masonry arcades with the aquaducts on top that are still
standing after a couple of thousand years are a good example. They
have not shown any signs of slumping.

Casady

On Jul 7, 10:37*am, W1TEF wrote:
On Wed, 7 Jul 2010 06:46:03 -0700 (PDT), jamesgangnc





wrote:
On Jul 7, 8:50*am, Richard Casady wrote:
On Wed, 7 Jul 2010 04:40:31 -0700 (PDT), jamesgangnc

wrote:
I'm thinking that it's just sagged over the years till it has negative
camber. *That seems to be the most logical explanation since I have
the same wear problem on both sides. *A bent axle would not likely be
bent symetrically. *Nor does it seem reasonable that the toe would
change on both sides.

It is not going to break. The yield point is a substantial percentage
of the stress at which it would break. It it bends sitting, it would
break the first time you hit a bump.

Question is will my parking it with a floor jack under the center bent
it back over time.

No. See above.

Really? *Cause it bows up about 3" in the center when I lift the
entire trailer and boat from the center of the axle with the floor
jack. *You're saying that doesn't matter, that's not enough to bend it
any. *Even if I do this for cummulative months?

Did I understand you right - it bows a full 3"?

There is no way it should flex a full 3" and that is probably your
problem.- Hide quoted text -

- Show quoted text -

No, you don't understand. It only flexes up when I put a floor jack
under the center of the axle and jack it up till it's trying to lift
the whole thing off the ground. It's only a 2" square tube axle with
a 19' V8 boat on the trailer. 2" square axles can be used up to
3500lbs. The axle between the springs normally doesn't have any
significant load. The load is all on the last 4" from the springs to
the spindle.

I'm doing this because I'm thinking that over the 20 yeasr of it's
life it has slowly sagged in the other direction. Now I'm trying to
make it sag back the other way but hopefully a bit faster since I'm
putting a lot more stress on it.

In article ,
says...

On Wed, 7 Jul 2010 06:46:03 -0700 (PDT), jamesgangnc
wrote:

On Jul 7, 8:50*am, Richard Casady wrote:
On Wed, 7 Jul 2010 04:40:31 -0700 (PDT), jamesgangnc

wrote:
I'm thinking that it's just sagged over the years till it has negative
camber. *That seems to be the most logical explanation since I have
the same wear problem on both sides. *A bent axle would not likely be
bent symetrically. *Nor does it seem reasonable that the toe would
change on both sides.

It is not going to break. The yield point is a substantial percentage
of the stress at which it would break. It it bends sitting, it would
break the first time you hit a bump.



Question is will my parking it with a floor jack under the center bent
it back over time.

No. See above.


Really? Cause it bows up about 3" in the center when I lift the
entire trailer and boat from the center of the axle with the floor
jack. You're saying that doesn't matter, that's not enough to bend it
any. Even if I do this for cummulative months?

Did I understand you right - it bows a full 3"?

There is no way it should flex a full 3" and that is probably your
problem.

Hummmm, wonder if it's actually the original axle? Could have been
damaged and he did mention a different setup on the spindles welding or
something like that..

--
Rowdy Mouse Racing - We race for cheese!