lets talk steering. castor woes and return line blowouts.

[TorkDSR]

lets talk steering geometry: castor woes and a box/pressure problem

1, the easier problem: hydro steer box and pump from wto; 2 return ports on the box for a hydroboost truck. keep blowing return lines before my cooler. what kind of pressure is supposed to be in the return line? please dont tell me my cooler is blocked

2, what is optimal castor angle for a trail only truck? and why? i wanna shim my schizzle 6-8* to correct for a clocked t-case. that will bring it to 2-0* castor angle.

thanks guys

 

[4X4HIGH]

Not sure about your first question but the second question i think i can help you with.

Caster angle is anywhere from 6*-11* on most factory vehicles. The less you have the less your tires will return to center when you make a turn. You will have to use your hands to make your turn and also to return the wheels back to a straight position. The less caster angle you have the worse it is going to be to drive and handle.

 

[TorkDSR]

thanks, im really trying to figure this out for a trail only truck. hopefully the ram will help overcome the toughness

 

[originalspanksta]

.......

 

[TorkDSR]

i don't think anything he stated supported anything you vomitted up earlier





keep the facts coming guys!

 

[originalspanksta]

The less caster angle you have the worse it is going to be to drive and handle.

.....

 

[TorkDSR]

yunit hooked me up off the bbs

from a website

The tilted steering axis has another important effect on suspension geometry. Since the wheel rotates about a tilted axis, the wheel gains camber as it is turned. This effect is best visualized by imagining the unrealistically extreme case where the steering axis would be horizontal-as the steering wheel is turned, the road wheel would simply change camber rather than direction. This effect causes the outside wheel in a turn to gain negative camber, while the inside wheel gains positive camber. These camber changes are generally favorable for cornering, although it is possible to overdo it.

Most cars are not particularly sensitive to caster settings. Nevertheless, it is important to ensure that the caster is the same on both sides of the car to avoid the tendency to pull to one side. While greater caster angles serve to improve straight-line stability, they also cause an increase in steering effort. Three to five degrees of positive caster is the typical range of settings, with lower angles being used on heavier vehicles to keep the steering effort reasonable.

i think that answers all my questions.... 8* here i come
easier steering, but my camber thrust angle will be a little more perpendicular to the road... there goes the high speed cornering

 

[originalspanksta]

all im saying is that the 8* shim is awfully far. It looks like it will take you all the way to 0*caster. i think you could go 4-5* and see the benefits on the driveshaft and in the steering in a nice compromise.

 

[jarheadk5]

hydro steer box and pump from wto;

Stupid question time...
Have you talked to WTO about this?
My first impulse would be to say "blocked or restricted cooler", but you said not to say that... so I won't.
Having NOT said that, are any of the flexible return lines bent really tightly, or any hard lines kinked or dented? There's obviously a restriction in the return circuit somewhere...

 

[TorkDSR]

see.... everything worked fine untill i put the new pump/ box on. so all the lines are the same, and so is the cooler. so i've ruled out a blockage... unless some giant hunk of crap came outta the box and into the lines.
and there doesnt appear to be any bent lines
calling them isnt a half bad idea

 

[BlueBlazer]

If you increased the flow through the cooler (which happens when you add a ram to the system) then any restriction in there before will be much more evident. If the hose is blowing off before the cooler, then that is a big red flag that the cooler is clogged somehow, it just wasn't bad enough before with the amount of flow going through it. Basic hydraulic principle, more flow with same restriction = higher pressure before the restriction, thus blown lines.

 

[TorkDSR]

there is no ram in the system yet.. like i said, just the box and the pump

 

[BlueBlazer]

Sorry, I assumed since you put a hydro steer box on you also installed a ram. I still think your cooler is the problem from the way you describe things, but without seeing your setup in person and the operating conditions when it happens it is hard to say.

To answer one of your earlier questions, the return side should have no pressure except the little that is created from restriction of lines and fittings and such.