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Old 05-13-2007, 01:33 AM   #1 (permalink)
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Unimog 404 Power Steering

A quick question about putting Power Steering in a 404 Unimog..I am wondering what options there are to acheive this?

I dont want to go Hydro sterr as its going to be on the road.

Is there an easy bolt in option that is readily available?
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Old 05-13-2007, 08:20 AM   #2 (permalink)
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Quote:
Originally Posted by TractivForce View Post
A quick question about putting Power Steering in a 404 Unimog..I am wondering what options there are to acheive this?

I dont want to go Hydro sterr as its going to be on the road.

Is there an easy bolt in option that is readily available?
Several venders have toyed with power assist on these. None sell them off the shelf cause the market is not big enough.

Again..... get a red star or use google advance to search pirate. All you need to know is in here already.
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Old 05-13-2007, 10:45 AM   #3 (permalink)
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The power steering box from an old U421 is the easiest way to convert an U404 to power steering.


www.killeraxles.com
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Old 05-13-2007, 11:21 AM   #4 (permalink)
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Quote:
Originally Posted by Wolfgang View Post
The power steering box from an old U421 is the easiest way to convert an U404 to power steering.


www.killeraxles.com
Any chance you know of a 421 box that I can buy?
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Old 05-13-2007, 03:23 PM   #5 (permalink)
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Thanks Guys
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Old 05-14-2007, 10:30 AM   #6 (permalink)
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Quote:
Originally Posted by Wolfgang View Post
The power steering box from an old U421 is the easiest way to convert an U404 to power steering.www.killeraxles.com
Yeah but arn't those like nearly imposible to find at a reasonable cost compared to using domestic parts and good customizer/welder?

Tractive.... have you looked in the DIY FAQ thread that is stuck near the top of this forum. There might be a link to powersteering threads in there
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Old 05-14-2007, 07:00 PM   #7 (permalink)
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Old 05-14-2007, 09:32 PM   #8 (permalink)
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I called Matt and the he quoted me a price of like $3000 + about a year ago. Thanks but no thanks.
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Old 05-14-2007, 09:52 PM   #9 (permalink)
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check out

/forum/mercedes/154685-404-power-steering.html

http://pirate4x4.com/forum/showthread.php?t=399840
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Old 05-16-2007, 11:26 AM   #10 (permalink)
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i have a 411 mog and that has hydro asist steering on
it does not use or connect to the steering box apart from the steering arm that connect to the body of the ram(its just a standard box)
it has a pump and the hoses go from the tank to the pump then to the ram then back to the tank it must have some sort of valve that as soon as you start to turn it allows the ram to open or close
ive never seen it done like this before but it works well and could swap it over onto anything you want
you can see it working on youtube.com (type in minimog/cowm)

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Old 05-16-2007, 11:46 AM   #11 (permalink)
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Quote:
Originally Posted by zukibrit View Post
i have a 411 mog and that has hydro asist steering ...it has a pump and the hoses go from the tank to the pump then to the ram then back to the tank it must have some sort of valve...
Look on the steering shaft between steering wheel and steering box and see if their is a small unit plumbed in with hydraulic hoss also. This would be the valve you speak of that interprets the input from the steering wheel. It may be somewhere else though. Could you take some pics of the whole set up. Im curious.
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Old 05-16-2007, 12:09 PM   #12 (permalink)
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nope nothing on the shaft or box
ive just striped it of to go onto the off roader im building but i will take some pics of how it all connects together for you
like i said ive never seen it done like this and its an original schmidt vf1 snowblower so mabe if you contact the schmidt restroration they might give you the type of ram used
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Old 05-16-2007, 12:55 PM   #13 (permalink)
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This type of steering is easy to install. The valve is where the draglink touches the cylinder. You can find the same system in older Corvettes.

We can get this steering brand new for all types of trucks here in Europe.
The price is between 1000 and 1300 USD.


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Old 05-16-2007, 01:35 PM   #14 (permalink)
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if you know about this sort of system could i use a orbital steering valve and go full hydro without the use of the steering arm or would i need another type of ram (single action connected to the axel one end and the steering arm the otherend)
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Old 05-16-2007, 03:20 PM   #15 (permalink)
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You do not need an orbital valve. It is a single action connected to the axel one end and the steering arm the other end.
This system is also street legal.

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Old 05-16-2007, 03:54 PM   #16 (permalink)
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A guy I know over here in OZ converted a RHD Pinzgauer 6x6 to power steer with a Merc G wagon Box. It might also work on a 404?
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Old 05-16-2007, 06:25 PM   #17 (permalink)
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I bought Doug's Unimog mentioned by CoachGeo
http://pirate4x4.com/forum/showthread.php?t=399840

This thing is the BOMB... 1 finger turning even in 4x4 locked.
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Old 05-16-2007, 07:58 PM   #18 (permalink)
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E700 Ford hydraulic valve mounted on drag link.
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Old 05-16-2007, 09:58 PM   #19 (permalink)
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E700 Ford hydraulic valve mounted on drag link.
I think I see what's going on there but I'm not sure. Can you explain?
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Old 05-16-2007, 10:10 PM   #20 (permalink)
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I understand it now. How well does it work?
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Old 05-17-2007, 04:49 AM   #21 (permalink)
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wolfgand reed my post again the system is up and running on a 411 and is working correctly i want to go FULL HYDRO so im not worried about the suspension travel afecting the steering or visversa it going on a offroader so does not need to be legal that way i can have my front axel placed infront of the engine for max articulation
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Old 05-17-2007, 10:53 AM   #22 (permalink)
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Quote:
Originally Posted by Tyson Pfenneberger View Post
E700 Ford hydraulic valve mounted on drag link.
what modification did you have to make to the Mog's Pitman arm to mate up with the E700 valve?

Am I correct in thinking that this unit acts simular to an orbital valve in that as the pitman arm swings it turns slightly the innerds of this box and from this valving sends hydralic fluid to the ram you replaced the steering stabilizer with.

Would you mind posting pics of how you mounted your ram. Its been noted a lot that the steering stabilizer mounts are not beefy enough to use with a ram.

THANX in advance
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Old 05-17-2007, 06:03 PM   #23 (permalink)
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The E 700 steering works pretty well. It is not the one finger steering of full hydro but is comparable to recirculating ball types. All the components I used were used parts. Such that, I am sure if I upgraded the pump and tweaked the draglink valving, I bet the performance could be improved considerably .
I modified the pitman arm by grinding a matched taper to the E 700 existing valve stem taper. The ram is mounted with brackets top and bottom of the axle and no stabilizer mounts were used. As for the rod end, I welded a tapered bung to the existing steering arm and tied it into the portal box. If I were to do it again, I would use a shorter ram and tie it to the axle directly off the end of the ram.
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Old 05-21-2007, 08:35 PM   #24 (permalink)
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Sweet manufacturing power steering servo,installs in the steering column,tunable with internal torsion bars.Still utilizes steering box and drag link,you will need to add a hydro ram,I'd say it'd be better than a torque generator as the hydro assist doesn't input into the steering box.
http://www.sweetmfg.biz/products2.asp?edit_id=33
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Old 05-21-2007, 10:26 PM   #25 (permalink)
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Quote:
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...,tunable with internal torsion bars....
Wonder of that is tubable at factury or user tunable?
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