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Old 05-14-2003, 07:03 PM   #1 (permalink)
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creeping hydro assist

I joined the ranks of everyone running their homemade hydro assist steering. My YJ has a 5.0 and 37's. I couldn't turn the tires sitting still with the ford pump screaming at me so I did the ram. Kept the stock pump for now, will put saginaw pump later. Worked great! Now can steer with one finger!

I did notice something that didn't seem right. With the ram disconnected and the motor on. The ram would creep out to full extension with no steering wheel input. I thought there had to be strain on the system before the ram worked? Or just normal behaviour?

Would debris in the system cause this? Should I put in a cooler and filter just to be safe or is there another problem? I didn't notice the system getting hot or anything.

I did a search and found lots of stuff about over heating and such but not the problem I described.

Thoughts?
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Old 05-14-2003, 11:54 PM   #2 (permalink)
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I am not positive on this but I think that the ram would want to go either in or out when its not hooked up. I think there would be just enough pressure coming from the pump. I bet you could hold it back with your hands though so I wouldnt worry about it.

I would run a cooler since its so cheep, its good insurance.
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Old 05-15-2003, 07:12 AM   #3 (permalink)
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AFAIK it shouldnt move as you described, seems maybee your orbital isnt shutting off the flow all the way.

and yes.. you need to run a cooler.
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Old 05-15-2003, 07:39 AM   #4 (permalink)
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I don't think that it is a serious problem.
Looks like there is a small amout of oil coming thru the valve.
On single ended cylinders if the pressure is the same at both ports the rod will extend.

I don't know if this cause a slight pull to one side when going straight.

hth
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Old 05-15-2003, 08:32 AM   #5 (permalink)
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i'm not positive, but if i remember correctly, a properly installed ram(i.e. lines hooked up correctly) with the vehicle off the ground, the tires should drift to one side...if they don't, then the lines are likely crossed. i believe your system is fine.
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Old 05-15-2003, 08:49 AM   #6 (permalink)
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It's fine. On a single-ended ram the piston area is larger on one side than the other (retraction side is smaller because the shaft reduces the piston area). So, with equal pressure on both sides of the piston it will extend.

Filter is up to you, but a cooler is HIGHLY recommended. Any tranny cooler will work.
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Old 05-15-2003, 02:16 PM   #7 (permalink)
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Thanks!

Thanks guys! I will be putting a cooler on ASAP and guess I won't worry about the rest!
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