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Old 07-09-2012, 12:19 PM   #15
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I did. They did not have the information immediately available and will have to call me back.

...still waiting....
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Old 07-09-2012, 01:23 PM   #16
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As some of you know, my company supplies most of the wheel alignment equipment for Ford, as well as most other manufacturers. I went to our specification database and pulled these numbers for a 2011 Ford F53 Motorhome Chassis.

If it is a 16,000 to 22,000 lb chassis, here are the factory specifications.

Camber 1.0 degree Plus or Minus .75 degrees
Caster 4.63 degrees Plus or Minus .75 degrees
Toe .06 Degrees Plus or Minus .30 degrees
(If you want toe in inches, simply divide the degrees by 2. For example .06 degrees is .03 inches, or about 1/32 inch.

If it is a 24,000 or 26,000 lb. chassis the numbers are determined if it is loaded or empty. Here they are.

Empty

Camber .38 degrees plus or minus .75 degrees
Caster 4.5 degrees plus or minus .75 degrees
Toe O degrees plus or minus .50 degrees

Here is how Ford says the loaded specs are....."Loaded with Full Fuel, Water Tanks, and Gear".

Camber .13 degrees plus or minus .75 degrees
Caster 4.0 degrees plus or minus .75 degrees
Toe .04 degrees plus or minus .10 degrees
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Old 07-09-2012, 02:17 PM   #17
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That is EXACTLY what I was looking for!
Thank you Horseshoe!!

Now I have to wait until I get home to compare the numbers against my print out.


Thanks again!!
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Old 07-10-2012, 01:06 PM   #18
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Quote:
Originally Posted by Fiesta48 View Post
Adding caster (3 to 5? degrees )will fix most of the wandering problems most people are experiencing at 10% of the cost. KISS.

How is caster changed on an I beam axel?

Do you simply bend the axel on each side at the kingpin?


I assume if you are increasing caster you are essentially tilting the kingpin forward at the top and back on the bottom by bending something.
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Old 07-10-2012, 02:29 PM   #19
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Caster is changed by putting a wedge shaped shim between the spring mount and the axle. Camber is changed by bending the axle. The key to bending the axle and not having it bend again at the same point is to do it cold. It generally requires a 50 ton or larger jack. If it's heated and bent the steel will loose strength and likely bend again in the same spot when you hit enough pot holes.

At one time one of the aftermarket suspension parts makers (MOOG I believe) made a tapered shim to change camber on a solid rear axle. It fit between the axle tube and the backing plate.
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Old 07-13-2012, 10:53 AM   #20
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Just for future reference... I finally got the information directly from Ford.
Horseshoe was spot on for my coach!

F-53 Alignment Specs.pdf
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Old 07-14-2012, 06:39 AM   #21
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Originally Posted by Horseshoe View Post
As some of you know, my company supplies most of the wheel alignment equipment for Ford, as well as most other manufacturers. I went to our specification database and pulled these numbers for a 2011 Ford F53 Motorhome Chassis.

If it is a 16,000 to 22,000 lb chassis, here are the factory specifications.

Camber 1.0 degree Plus or Minus .75 degrees
Caster 4.63 degrees Plus or Minus .75 degrees
Toe .06 Degrees Plus or Minus .30 degrees
(If you want toe in inches, simply divide the degrees by 2. For example .06 degrees is .03 inches, or about 1/32 inch.

If it is a 24,000 or 26,000 lb. chassis the numbers are determined if it is loaded or empty. Here they are.

Empty

Camber .38 degrees plus or minus .75 degrees
Caster 4.5 degrees plus or minus .75 degrees
Toe O degrees plus or minus .50 degrees

Here is how Ford says the loaded specs are....."Loaded with Full Fuel, Water Tanks, and Gear".

Camber .13 degrees plus or minus .75 degrees
Caster 4.0 degrees plus or minus .75 degrees
Toe .04 degrees plus or minus .10 degrees
Horseshoe,
Would the specs be the same for the 1998 V10 Ford F53 ?.
Thanks, Neil
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Old 07-14-2012, 10:25 AM   #22
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I'll check them when I get back to where my alignment machine is. It might be a day or two, but I'll get it for you.
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Old 07-15-2012, 06:17 PM   #23
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Yes Neil, they are for 2008-2011.
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Old 07-17-2012, 08:04 PM   #24
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Went to a local Ford dealer's Truck Shop and asked about alighment. The service manager told me that the only adjustment is toe in or out. Don't know if he was feeding me a line because camber should be possible on a stright axle too. Now caster might be a trick with that big stright axle but you guys got me wondering so I'll get under the front end tomorrow and see if I have adjustable rods.
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Old 07-18-2012, 03:29 AM   #25
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Quote:
Originally Posted by Horseshoe
Yes Neil, they are for 2008-2011.
Would appreciate the specs you have for the 07 chassis.
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Old 07-18-2012, 07:41 AM   #26
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Originally Posted by chuckftboy View Post
Went to a local Ford dealer's Truck Shop and asked about alighment. The service manager told me that the only adjustment is toe in or out. Don't know if he was feeding me a line because camber should be possible on a stright axle too. Now caster might be a trick with that big stright axle but you guys got me wondering so I'll get under the front end tomorrow and see if I have adjustable rods.
Toe and caster are correctable with little effort. Toe is a simple adjustable link, and caster can be changed with a shim between the axle and the spring pad. Usually caster is adjusted equally on each side because too much of a twist on the axle can cause the spring to bind or other not so good problems.

Camber can be corrected by bending the axle, though no axle manufacturer approves of it or warranties any problems that might happen because of it.
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Old 07-18-2012, 08:29 AM   #27
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Originally Posted by chuckftboy View Post
Went to a local Ford dealer's Truck Shop and asked about alighment. The service manager told me that the only adjustment is toe in or out. Don't know if he was feeding me a line because camber should be possible on a stright axle too. Now caster might be a trick with that big stright axle but you guys got me wondering so I'll get under the front end tomorrow and see if I have adjustable rods.
When Ford sold its heavy duty truck line to Sterling in 2000 they lost a lot of the truck alignment business. Our loacal Ford truck dealer pulled out the HD truck alignment rack and dynamometer in about 2002 to make room for more profitable equipment.

In most cases the camber doesn't need to be changed so there's no money to be made with a piece of equipment that takes up a whole service bay and is rarely used. In our area a couple truck shops still have a HD rack. Because they're so few and far between you have to make an appointment a few weeks in advance.
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Old 07-18-2012, 08:37 AM   #28
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Horseshoe,
Would the specs be the same for the 1998 V10 Ford F53 ?.
Thanks, Neil
Here's a link to the Ford Bulletins.

https://www.fleet.ford.com/truckbbas/non-html/Q59.PDF

"Q-59 Clear vision Alignment" gives the alignment specs for the 1998 through at least the 2004 model years F53 chassis.

The bulletin also covers aligning the steering wheel after aligning the front end. Unlike the Workhorse chassis the Ford F53 chassis has only 1 adjustment for toe in. Once the toe is set the steering wheel may have to be removed and recentered.
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