Biginboca

The top arrow is the direction the ram pushes the pitman arm when the ram is mounted on the pitman arm.

The bottom arrow is the direction needed to steer.

Mounted on the axle the ram pushes identical to the bottom arrow.



If the tire is jammed into a rock when the ram pushes in the top arrow it wants to bend the drag link and severely stresses the drag link end at the pitman arm in an axis maybe 20 degrees off axis. This potentially compromises that rod end also.

TOTL Innovations

Ok now I follow you. Sorry for the confusion on my part.

Biginboca

No worries! I didn't understand this either until it was explained to me also.

blowermax

So what you're saying is that, when the ram is mounted to the pit man arm, it can cause more potential stress on the drag link or tie rod system?

Biginboca

No, not exactly. What I'm saying is the ram on the axle (tie rod) saves the drag link from stress. The drag link would see less stress than normal because most (maybe all) the steering stress is on the ram.

With the ram on the pitman arm it adds significant stress to the drag link and could easily bend it. This would be especially so when the passenger tire is drooped as in my image above.

As far as I can tell the tie rod would see the same stress either way.

DJ1

Exactly. Assist mounted up high @ pitman arm + drooped draglink = x + y force vectors on the steering knuckle = less efficiency. Assist @ tie-rod = x force vector only = max efficiency.

Steering knuckle, tie-rod, and ram-assist mounted parallel to the tie-rod all move on the same plane of direction. All 3 essentially moving all along the x-axis if both the tie-rod and imaginary axis drawn vertically through the steering knuckle's tie-rod mounting hole (which is now the y-axis), are perpendicular to each other.



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blowermax

Gotcha! I was hoping EVO would provide more info on this setup....I couldn't afford PSC so I went with a Redneck ram system and still determining where I am going to mount it...Thx for all the insight!

DJ1

I'm getting the WTO ram also and am mounting it at the tie-rod, double shear on both ends. The only thing I'm doing differently is upgrading all the lines to the PSC high-pressure lines WITHOUT the teflon inserts and will keep the WTO lines as spares.




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Invest2m4

Ah, perfect. A picture of what I have tried to explain to the crowd running out to buy the new PSC steering box. That about sums it up.

chknkatsu

with the passenger side drooped all the way the movement of the draglink is NOT on the same plane as the pitman arm.