Steering for 2006 Suncruiser

[lesmccoy3]

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 

 

[Utclmjmpr]

Are you using the correct tire pressure??>>>D

 

[lesmccoy3]

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]

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]

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.

 

[Harvard]

OP, do you have an alignment report to share?

In particular, where is the caster set in respect to its spec.
For example, +3.5 +/- 1.5 should be set at +5.0 degrees (or more) for best results.


Note the comment by "SuperSteer" in this link.
http://www.irv2.com/forums/f258/alignment-specifications-2002-workhorse-35u-259526.html

 

[lesmccoy3]

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]

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]

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]

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