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Self Leveling Unit


hannam.john

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My understanding is that the Range Rover should sit level when unladen without the assistance of the self levelling unit. Discoveries/90's/110's do not have the unit fitted and still manage to sit roughly level.

What age/condition are the rear springs in?

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The self levelling unit only makes a difference when you have weight in the back - with a load on it pumps up as you drive away with the bouncing of the suspension till it gets to normal ride height again. It meant they could use a soft spring and still maintain ride height. Didn't help with body roll though.

Just fit some new disco rear springs and that will sort it, or a bit heavier duty if you want a firmer ride through corners. If you google Land rover spring rates you should find a site someone made with a comparison of spring lengths/rates which is useful.

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  • 2 weeks later...

Yes, they can be rebuilt. It's a specialised job and probably a shock absorber rebuilder would be a good start, preferably one that deals with old cars. The self-levellers have a pressurised gas inside so it's not something you do on your kitchen table unless the inlaws are visiting.

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I'm in the middle of the same job and I did find these links: http://www.landroverclassicparts.com.au/ProductDetailLarge.aspx?largerProduct=133215 for an exploded diagram, and http://www.ebay.de/itm/Range-Rover-Rangerover-Hydromat-NRC4163-/370230493405?pt=DE_Autoteile&hash=item56337500dd has one for sale. They aren't cheap, and there don't seem to be that many around anymore as the uninformed apparently chucked them away over the years, as if the factory just put them on for no real reason. But you're in England and should be able to find a used one sooner or later for a rebuild. I don't see why rebuilding one would be too much different to a gas-filled shock. Don't forget all the other parts like the balljoints and gaiters and so on. Good luck!

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  • 4 weeks later...

I'd be interested to hear if anyone has had one of these overhauled. I have the bigger version on my 110 and i like the ride. It is however 22 years old (but i think still functioning for now), so it would be nice to know of somewhere it could be overhauled. I'd always heard that they were not serviceable and once they stopped working they were scrap - so glad to be proven otherwise.....!

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John

Did you get sorted?

I think I have a Boge unit in the back of the garage somewhere! I have definitely got the ball joints for it. I am out the country just now, but can have a look next week if you are interested.

Mike

if no one has taken you up on it I would be very interested!

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No probs.

Can you PM me at the weekend please as I have a brain like a sieve?

I was supposed to be back in country tomorrow, but have put off travelling until the stike action is over.

I have definitely got the ball joints but can't remember where I pit the SLU!

Cheers

Mike

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  • 4 weeks later...

The Boge SLU's in my opinion are a fantastic piece of technology. They mean you can have soft suspension but still tow and carry decent weights - but without the complexities of air suspension. I often wondered how practical it would be to mount one on each wheel for load sensing suspension!

Si

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  • 3 weeks later...

Just a note that I got mine rebuilt and it does indeed work well . . . but I think it's responsible for a loud honking noise when I hit a bump! I'm waiting to see if it's one of those things that will go away.

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Just a note that I got mine rebuilt and it does indeed work well . . . but I think it's responsible for a loud honking noise when I hit a bump! I'm waiting to see if it's one of those things that will go away.

Mother - in - law in the back seat? Sorry, couldn't resist it!

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And here I am thinking there was a helpful answer!

Anyway, it couldn't be as the mother-in-law is usually strapped on the roof rack. And the brother-in-law would be too scared to get in an old car like this in case it caught fire.

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