Steering for 2006 Suncruiser

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lesmccoy3

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Joined
Apr 18, 2019
Posts
6
I have a 2006 Suncruiser on a work horse chassis, w-22 I think.  Chevy engine, Allison transmission.
  I have to constantly adjust the steering wheel while driving.  +/- about 5 degrees or so.  But it is constantly having to steer it.
  I have had other class A motor homes and sure don't remember having to steer it as much.
  I have new tires on it, and have had the front end aligned.
  Should this be able to correct, or is it built into the system?  Anyone with any comments.
Thanks
Les in Peoria Arizona 
 

lesmccoy3

Member
Joined
Apr 18, 2019
Posts
6
Yes, I am using the tire pressure listed on the coach sticker.
  At one time I put the front tires 10 pounds under ( to 90 lb).
  But could not tell any difference.
Les in Peoria
 

Harvard

Well-known member
Joined
Feb 14, 2011
Posts
220
POPULAR MECHANICS MAY 1973:
START QUOTE:
If too little caster exists, the car will wander and weave,
thus necessitating constant corrections in steering.
END QUOTE:


There are at least two ways to increase the effective
runtime caster:

1. Decrease the tire inflation pressure to the required
minimum for load (to increase Pneumatic Trail), this
should give you the maximum available benefit from the
existing caster angle. It appears this effect is much more
pronounced on larger wheels (ie 22.5 inch vs 16 inch)

AND/OR

2. Increase the caster angle during an alignment
(to increase caster trail).
 

PJ Stough

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Joined
Sep 20, 2009
Posts
2,394
Location
Central Iowa
lesmccoy3 said:
Yes, I am using the tire pressure listed on the coach sticker.
  At one time I put the front tires 10 pounds under ( to 90 lb).
  But could not tell any difference.
Les in Peoria

The tire pressure listed on the sticker may not be the optimum pressure.  That can only be calculated by having all four corners of your RV weighed individually, and then going by the tire pressure chart for your particular tires.  Another issue may be too much weight on one side of the RV.
 

lesmccoy3

Member
Joined
Apr 18, 2019
Posts
6
I don 't have the alignment report with me.  But I will retrieve it when I get back to Arizona and see what it is Thanks for the help.
Les in Peoria
 

Heli_av8tor

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Mar 3, 2017
Posts
1,008
Location
NW Illinois
I went through all the above with minimal effect.

What did fix it was a trac bar and heavy duty anti-sway bar front and rear. Day and night difference.
No longer do I dread seeing a semi about to pass.

Tom
 

Harvard

Well-known member
Joined
Feb 14, 2011
Posts
220
Heli_av8tor said:
I went through all the above with minimal effect.

What did fix it was a trac bar and heavy duty anti-sway bar front and rear. Day and night difference.
No longer do I dread seeing a semi about to pass.

Tom

What caster setting did you end up with?
 

Heli_av8tor

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Mar 3, 2017
Posts
1,008
Location
NW Illinois
I didn't get a report. I just know they added a shim to get it "right".

Their equipment and the mechanic was old school.

Tom
 

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