Thread: standard height and slotted swivels

Wouldn't that just increase the self centering force of the steering?

yeah thats what i thought

Vern, what tyres are you running. I think I have read that guys run more castor on bigger tyre'd comp trucks. If 3 degrees is ok on 29s and 32s I'm thinking a couple more may be ok if running 32s or bigger.

How much will you be driving it before the change?

will only drive it to get engineered and roadworthy, then change it all. Running the same springs as on my old rangie, that had 4.5" front bumpstop clearance and the swivels were rotated. Stock tyres for engineering, then only running 285/75, downsizing from 35's. (for now)

Originally Posted by uninformed

Vern, what tyres are you running. I think I have read that guys run more castor on bigger tyre'd comp trucks. If 3 degrees is ok on 29s and 32s I'm thinking a couple more may be ok if running 32s or bigger.

How much will you be driving it before the change?

Hi Serg

You have missed something in your process, to fit large diameter tyres under the guards, there has to be more clearance available.

The extra clearance for the large tyres is achieved by extending the working position or length of the springs. The other end of the radius arm pivots on a chassis outrigger, that mean that as the axle housing is moved down and away from it's original position, the radius arm rotates in a arc centred on that point on the chassis.

As the arc increases, the king pin caster angle also comes around that pivot point, as the pivot is fixed in respect to the centre line of the radius arm, slotting the flange holes does allow the caster to be adjusted to varying spring requirements and can be done at any time to suit the spring setup.

Personally, I don't like the idea of removing any material from the flanges to adjust the caster angle, instead would look at some after market caster corrected radius arms, but doing this does cause the diff pinion angles in respect to the front drive shaft to increase with the likelihood of binding problems with the universal joints.
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Bugger all material gets removed, they are only slotted a few mm. I could go the arm way, just swap out the front arms when done with the engineer, but i prefer the swivel method.

Originally Posted by Vern

Bugger all material gets removed, they are only slotted a few mm. I could go the arm way, just swap out the front arms when done with the engineer, but i prefer the swivel method.

Whats the arm method?

Hi Arthur, I'm well aware what's going on. I know I didn't go into detail, but what I was getting at was these guys are adjusting castor for their lift AND adding more for the larger tyres.

What is the reason you don't like the idea of slotting?

Slunnie, I'm guessing cranked RA