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Old 10-26-2016, 07:31 PM   #1 (permalink)
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4 wheel steer with traditional rack

Hey All,
I'm building a light duty buggy with dana 25 axles and a geo metro 1.0l engine, just to move light things around the farm. I have two dana 25 front axles and want to do 4 wheel steering, but on the cheap. I looked into full hydro steering but cost may be prohibitive unless i can find used orbitals or cylinders.

I was thinking - typical power rack and pinion steering systems use a hydro assist - some of them like in the hondas have hydraulic lines from the control valve to the double end cylinder that does the steering - has anyone tee'd these valves and run it to a second rack and pinion? Here is a pic of what i'm thinking:




Doesnt have to be strong; i am using 25" narrow (165) wheels and a light chassis.

Will this work? Has anyone done something like this I can reference?
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Old 10-26-2016, 07:53 PM   #2 (permalink)
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Assuming you are not hooking up the rear steering shaft I dont see it working
Once you start turning the front rack its going to send fluid to the rear at the same time and it will go full lock to either side with no proper control

Being a farm buggy tie both steering shafts together and hook the hydro lines up normally
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Old 10-26-2016, 07:55 PM   #3 (permalink)
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There is a guy on Zukicrawlers that used a electric 12V linear actuator ( think satellite dish ) for rear steer on his ultralight buggy build. It seemed to work really well for him.
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Old 10-26-2016, 11:08 PM   #4 (permalink)
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Quote:
Originally Posted by 92 s dime View Post
Assuming you are not hooking up the rear steering shaft I dont see it working
Once you start turning the front rack its going to send fluid to the rear at the same time and it will go full lock to either side with no proper control

Being a farm buggy tie both steering shafts together and hook the hydro lines up normally

Thanks, didn't think of that.. now have to think of an idea of how to tie one steering input to 2 outputs....

also, would the effective turning be twice as fast? Are there power steering racks that have more than the usual 2.5 turns lock to lock?
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Old 10-27-2016, 12:13 PM   #5 (permalink)
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I remember seeing a fiero years ago, that was done up as a rig for cruising farm fields I believe?
They put a manual rack and pinion in the back, and hooked a winch motor to the input. Push putton, electric steering.

Damned if I can remember where I saw it, but I put it in the memory banks for a never never project.
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Old 10-27-2016, 04:06 PM   #6 (permalink)
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Set the axles up for a normal tie rod and drag link. Put a pivot where the steering box would be and do the same thing at the back. Mount the steering rack longitudinally and make it push the pivots.
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