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Old 07-16-2019, 04:58 PM   #1
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Front End Alignment Today

I have 21,000 miles on my Winnebago Adventurer. It's the 24,000lb F53 chassis (RV is 2017, but the chassis is 2016 according to the sticker).

I've added a Roadmaster Steering Stabilizer, Sumo Springs front and rear and a Roadmaster Rear Anti-Sway bar. The RV handles pretty well. I've weighed the coach and adjusted my tire pressures and outside of bad roads and bridge transitions the RV drives pretty well. I can one hand drive it some, depending on winds and traffic and road conditions.

But it has never had an alignment and I felt it was time to see where I was at.

The tech took 1 1/2 hours and checked everything tires, shocks, steering, bushings and then hooked up the Laser alignment gear on each wheel.

He then set about putting everything within spec... EXCEPT Caster. Caster was currently at 5.7 degrees and spec was 4.65 plus or minus .75. He tried to bring it into spec but the nuts on the U-Bolts on the leaf spring were near the ends of the screw threads and to add shims would leave the nuts at the very end of the bolt. He wanted to order new longer U-Bolts but I chose to accept it as is rather than leave the RV for a week and make the trip back to the shop.

While deciding on this I looked on IRV2 and found other members that had accepted 5.6 and 5.7 previously and so I did the same.

Here's the results - what do you experts say about this? Would you have insisted on getting it to spec?

Final Settings as accepted are:
Camber: 0.5 Left / 0.7 Right
Caster: 5.7 Left / 5.7 Right
Toe: 0.03 Left / 0.02 Right
Total Toe: 0.05
Steer Ahead: 0.00
One more thing - my steering wheel was always slightly cocked to the right since the day I purchased the RV. Just a couple of degrees. Now it's straight ahead.

Also, since the RV was sitting over an open pit I was able to go down and check out everything underneath. That was really a PLUS.
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Old 07-16-2019, 05:07 PM   #2
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Interesting post- Thanks!
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Old 07-16-2019, 05:12 PM   #3
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A little extra caster makes it track straight. No problem leaving it.
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Old 07-16-2019, 05:18 PM   #4
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little more toe in would be good. I like to set at at max, maybe even a little past max.
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Old 07-17-2019, 07:33 AM   #5
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I would love it if someone could post a alignment 101 explanation. I just don't understand the purpose of all this. Why wouldn't tires be pointed straight ahead and straight up and down? Plus whatever that third thing is. Thanks, I'm an alignment newbie I guess.
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Old 07-17-2019, 07:36 AM   #6
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http://yospeed.com/wheel-alignment-e...er-caster-toe/
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Old 07-17-2019, 07:43 AM   #7
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Your caster at +5.7 degrees looks great. I am glad it was not reduced, more is better. IMO.
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Old 07-17-2019, 07:59 AM   #8
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Thanks.
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Old 07-17-2019, 08:04 AM   #9
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Quote:
I would love it if someone could post a alignment 101 explanation. I just don't understand the purpose of all this. Why wouldn't tires be pointed straight ahead and straight up and down? Plus whatever that third thing is. Thanks, I'm an alignment newbie I guess.
How it pertains to the F53 .

F53 chassis front end toe-in adjustment – 1999 Southwind 35S


..
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Old 07-17-2019, 11:16 AM   #10
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Waiter21, thank you for explanation on toe in. Great read and easy to understand.


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Old 07-17-2019, 10:14 PM   #11
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Thanks for posting! I have yet to have my alignment checked, and maybe it’s time.
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Old 07-18-2019, 07:58 AM   #12
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Originally Posted by Waiter21 View Post

Thank you.
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Old 07-18-2019, 09:35 AM   #13
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I understand how higher caster values aid in returning the wheels to center. I believe that I read somewhere that too much caster can cause front wheels to bound back and forth rapidly. Can anyone expand on this?
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Old 07-18-2019, 04:06 PM   #14
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Originally Posted by Fugitive861 View Post
I understand how higher caster values aid in returning the wheels to center. I believe that I read somewhere that too much caster can cause front wheels to bound back and forth rapidly. Can anyone expand on this?
Have you ever seen the front wheels on a shopping cart flop back and forth? That is the results of extremely positive caster. The early F53s with 16" tires had the problem and Ford added a dampener on the tie rod to help stop the problem. Also dynamic out of balance will bring on the issue.
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