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Old 01-30-2002, 02:35 PM   #1 (permalink)
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Hydro Assist Steering

Ok guys,
Here's another mod I'm working on: Hydro assist steering.

I already got the left side swivel housing from a RHD Defender that has the two arms on it (one in the rear for the tie-rod and one in front for the drag link from the RHD steering box.

Now I want to put a ram in front of the axle to push this thing. Anyone have any idea how I can make this work with the existing steering box and power steering pump?

I'm thinking there has to be a way to get an output from the box similar to what some people are doing on the Saginaw boxes. Then, all I'd need to do is find a stronger pump. Suggestions?

-j
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Old 01-30-2002, 02:37 PM   #2 (permalink)
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Doug,
You mentioned something about having found a better pump that will fit. Got any details?

-j
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Old 01-30-2002, 10:04 PM   #3 (permalink)
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Have a look at this, I've been thinking it might work for some time now.

http://www.ticonsole.nl/

Check the power steering kit out. It is for series Rovers but if it works like I think it does it should also add additional boost to the Coil Rover steering.

Andrew
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Old 01-31-2002, 03:40 AM   #4 (permalink)
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Shouldnt be too hard to do. All you need to do is to tap into the ps box to the two pressure feeds. The ps box does have a ram in it that forces a rack back and forth. One side of the ram is pressured by the external line on the outside of the box so this is v.easy to tap into. The other side of the ram is forced by pressure inside the entire ps box. So you just need to find a place on the ps box to tap intp this pressure feed which wont break the box in half.

So the external feed is easy and for the internal feed just drill and tap a hole in the casing and let me know how it goes because I dont think I will be far behind you.n

Sam
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Old 01-31-2002, 05:26 AM   #5 (permalink)
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John-

Is this for your 90 or 110...or both?

Johnathan
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Old 01-31-2002, 09:05 AM   #6 (permalink)
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Quote:
Originally posted by Jtisdale
John-

Is this for your 90 or 110...or both?

Johnathan
I'm starting with the D90 since it really needs the extra boost steering and then I'll look into doing the same thing (mirror image) on the D110 if it works out. It will be easier on the D90 since the pumpkin is on the right side of the axle and that leaves space on the left side for the hydraulic cylinder. At least, that's the way it looks right now. I'll have a further look at how everything fits under there when I get a chance.

-John
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Old 01-31-2002, 09:06 AM   #7 (permalink)
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John, give me a call.

--D
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Old 01-31-2002, 10:13 AM   #8 (permalink)
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Alternate ZF pumps

John - long time no talk.

Try this site for alternate ZF pumps. I'm sure you can get them anywhere without actually having to buy it from this place in the UK.



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Old 01-31-2002, 10:14 AM   #9 (permalink)
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Hmmm, didn't take the URL. Lets try again

http://www.4x4winches.com/zf.html
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Old 01-31-2002, 12:16 PM   #10 (permalink)
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Talk to Lakerat on ths board he owns west texas off road and can drill and tap any box for ram assist. Good quality work!!!
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Old 01-31-2002, 12:58 PM   #11 (permalink)
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Quote:
Originally posted by Billb
Hmmm, didn't take the URL. Lets try again

http://www.4x4winches.com/zf.html
Hey Bill!! Nice to hear from you again..

I owe you a check for the dues... Damn, things are slipping away from me!

I'll check that link out..

-John
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Old 01-31-2002, 01:25 PM   #12 (permalink)
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Quote:
Originally posted by Jason M
Talk to Lakerat on ths board he owns west texas off road and can drill and tap any box for ram assist. Good quality work!!!
I'll look into it! Thanks!!!
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Old 02-04-2002, 04:00 PM   #13 (permalink)
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Ok, another possibility.. I was playin around under my D90 and got to thinking: Why not just replace the steering dampner with a hydraulic ram?

I realize that means that drag link has to take loads of stress and the ball ends may not take it. What do you think?

-John
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Old 02-04-2002, 06:35 PM   #14 (permalink)
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Should be fine with the proper reinforcements...However, if the tire size is up there then I'd worry about the knuckle/ball tie-rod intersection strength. Pretty wimpy components stock actually...Especially when your tossing about 7-10K lbs at it via the ram.

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Old 02-05-2002, 08:10 AM   #15 (permalink)
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Hmm.. well that's where I was thinking the weak point is too. I'm wondering if they can be beefed in order to make them hold up to the ram. It would be a helluva lot easier to throw a ram into that space and have it up, out of the way, protected, and not obstructing suspension movement.

If I put it on the front of the axle, I really have to watch the clearance under the pitman arm, the front skid plate, and the draglink. And to top it off, it's not protected and I'll be bashing it on the rocks. Not a good thing in my book.

-John
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Old 02-05-2002, 08:42 AM   #16 (permalink)
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Good point's on the clearance issue...Yea'. go for it in the stabilizer space. What do you have to loose? Just buy a little 1/4" plate and start weldin'. I think one or two gussets would be plenty...And mayby a little strap on the knuckel. Presto!

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Old 02-05-2002, 08:47 AM   #17 (permalink)
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Just seems like an ideal place for a ram. I've already got the RoverTym Stainless drag link which is pretty damn strong. I think what I'll have to do is fab up a new link from the steering box to the drag link that will accept the ram and be stronger. Then look for stronger ball ends.

When I do this I'll make sure to carry more spares ( I already carry spare tie-rod, ball ends, and drag link) and then I'll have my underhood welder up and running so I should be able to fix it on the trail.

Sound like a plan?

Only other thing is that this will put a whole lot more stress on the panhard rod. I may have to strengthen that. Or once that factor is added in, maybe the ram on the axle housing isn't such a bad idea...

I dunno. Gonna hafta get the D110 running right and then I can wheel that while I tear into the front of the D90. You know I can't stand a weekend without wheeling..

-John
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Old 02-05-2002, 09:11 AM   #18 (permalink)
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Yea, you nailed it...The pan-hard will be taking a ton of stress with the ram...However, I wouldn't think that the rod strenght would be such an issue, as would be the box/pan-hard support. It looks pretty beefy, but not as butch as most. I dunno'. Try it, carry a spare support arm, and go for it. That's what I'll do, Unless I can't use it at all once I move the axle forward. In that case I'll make a mount/support a lot like this:

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Old 02-05-2002, 09:40 AM   #19 (permalink)
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I'll hafta look into that. More ideas for the never ending project list.

I did figure out how to tighten up the LR steering boxes.

Apparently, there is a set-screw with a lock nut on it on top of the box and by tightening this, play can removed from the box. Woo Hoo!! Don't need a new box for the D110. I'll hafta try that and see what happens..

-j
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Old 02-05-2002, 12:20 PM   #20 (permalink)
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Allen wrench and a normal wrench and you can tighten the box in under 1 minute. Carefull not to make it too tight and have it bind.

Also check wear in the ball joints and steering u joints.

If for some reason you need a new box meridian is the way to go. If you could live with a week of down time I am sure they could do the RHD one on the 110.

Ron
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Old 02-05-2002, 03:06 PM   #21 (permalink)
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yup, that's what I'm gonna do. I already know the play is in the box and there are no other problems that I can find. (Easy Merv! Down boy, down boy!)

Thanks.

-John
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