Home » Public Forums » GMCnet » [GMCnet] ride height adjustment
| Re: [GMCnet] ride height adjustment [message #30571 is a reply to message #30543] |
Tue, 16 December 2008 11:33   |
Rick Denney
Messages: 430
Registered: January 2004
Karma:
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Senior Member |
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Rob Mueller writes...
> G'day,
> Ken Frey sets the front ride height by setting the front wheels straight
> ahead and putting a level on top of the right and left axles. He adjusts the
> torsion bars until the bubble is centered.
> He noted this method compensates for different size tires.
> Comments?
Personally, I think one needs to isolate front and rear to set the
torsion bars. The air bags will adjust for side-to-side mismatches in
the torsion bars, leading to diagonal imbalances.
Ken Burton dials out this imbalance by using wheel scales and
adjusting the torsion bars and air bags systematically to achieve the
correct ride height while maintaining equal side-to-side weights.
For those of us who don't have scales, there is probably an easier
way, though it is still a bit time-consuming.
First, I would jack up the coach in the front from the exact center of
the front cross member. That way, the coach is free (up to a point) to
rock back and forth with changes in the air bags. Then, I would adjust
the rear air bags to provide approximately correct ride height and a
level coach on the front. That sets the rear such that it won't be
attempting to correct for a front imbalance. Then, I would lower the
front and adjust the torsion bars to achieve proper front ride height,
without touching the bags. That should prevent an imbalance in the
front caused by an opposite bias in the rear.
Once the torsion bars were set, I would then adjust the bag leveling
valves to achieve proper ride height on the rear when in Travel mode.
My coach was correct as received so I have not ever gone through this.
But I think getting rid of those diagonal biases is one key to getting
a coach to handle properly--my coach has been pretty good despite a
range of issues that are frequently seen on the list of causes of poor
handling.
Rick "who would NEVER have different tire sizes side-to-side on the
coach--ESPECIALLY on the front" Denney
'73 230 Ex-Glacier "Jaws"
Northern Virginia
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'73 Glacier 230 "Jaws"
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