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  #1  
Old 08-23-2008, 12:45 PM
Stumbler
 
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help? self-levelling won't level out, stuck up high!

i have just rebuilt my self-levelling suspension, filled it up and teh car is stuck up high on maximum extension of shocks. i may have turned the actuator arm a full revolution when i was working, and thus not returned it to it's rightful place (rotation) when i reconnected the sway bar. would this make a difference?

i have now tried disconnection it, and turning the actuator arm a full revolution in each direction, but it doesn't seem to make any difference at all, but perhaps i need to turn it more revolutions? assuming that is that turning it makes any difference at all.

also, while the car was up and the actuator arm disconnnected, i started teh engine and moved it up and down but the suspension did n't move at all? presumably it should? however, once back down, i could swear teh car is now riding even higher! i have tried bouncing on it to set it, but that makes no difference.

also, the fluid level is correct.

any help most gratefully accepted as it's a roly poly ride now, especially with a back full of logs!

thanks in advance.

stumbler

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  #2  
Old 08-23-2008, 01:07 PM
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Did you rebuild the SLS valve? If so, you may have flipped the cam backwards when you put it back together. If you did put the cam in backwards, you would know if the valve works when the lever is pointing toward the differential instead of the front of the car. Then the lobes on the cam would be over the valves in the valve body. The lever would also work opposite I believe. Down would be fill and up would be release instead of the usual way.

Another thought would be that you either have a kink or dirt in a return line. Does fluid recirculate back into the reservoir?
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  #3  
Old 08-23-2008, 02:04 PM
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Hi chad,
No i didn't rebuild the SLS. really all i did was replace the spheres and a connecting lines. there is a return flow running through so not a dirt problem.
two things:
1. does it make any difference if i revolved the SLS arm all the way around when putting it back together? I presume it doesn't make any difference.
2. i haven't been able to bleed it using the nipple on top of the sls, as it's rusted too tight to turn at the moment. could that be a problem?
3. when i detached the sls arm fromteh sway bar, i noticed that when i moved the sls, it wasn't completely smooth in operation, it had a slight 'notch' mid way through the turn. is this normal? i have moved it backwards and forward many times in case it was a bit of dirt but it doesn't seem to change, and it does feel quite mechanical, though somewhat odd too.?
thanks
stumbler
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Old 08-23-2008, 02:47 PM
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Quote:
Originally Posted by stumbler View Post
Hi chad,
No i didn't rebuild the SLS. really all i did was replace the spheres and a connecting lines. there is a return flow running through so not a dirt problem.
two things:
1. does it make any difference if i revolved the SLS arm all the way around when putting it back together? I presume it doesn't make any difference.
2. i haven't been able to bleed it using the nipple on top of the sls, as it's rusted too tight to turn at the moment. could that be a problem?
3. when i detached the sls arm fromteh sway bar, i noticed that when i moved the sls, it wasn't completely smooth in operation, it had a slight 'notch' mid way through the turn. is this normal? i have moved it backwards and forward many times in case it was a bit of dirt but it doesn't seem to change, and it does feel quite mechanical, though somewhat odd too.?
thanks
stumbler
Put some penetrating oil on the bleeder screw and keep working at it. On the w123's, like my wagon, the system is self-bleeding. I'm not sure if yours is or not. It sounds like you need to bleed it though. I would try that first.

As far as the notch you felt, it's smooth all the way around on my valve. That feeling could have been the o-rings in the valve binding up or possibly a damaged valve piston. If the piston is damaged, you could find a used SLS valve from another member. Daw_Two is always in the yards and could probably find one for you.
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2006 Nissan Pathfinder LE
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  #5  
Old 08-23-2008, 03:42 PM
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If yours is self-bleeding, i'd be surprised if mine wasn't, although having said that, why have a bleed nut? there is no way i want to get involved trying to replace the sls, too rusted in, it was something i considered and rejected.
the trouble is the car is just not worth having a garage sort it. if i can't sort it, it won't get done. i think the sls actuator is knackered, surely the suspension should have moved when i moved the actuator arm, with the engine going?
i'll keep trying that bleeding screw to see if it can make any difference.

but i would like to confirm from anyone that knows,
Does it make any difference if i have revolved teh sls actuator arm? i just want to clarify that moving 'screwing it in or out wouldn't make any difference'?

many thanks
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Old 08-23-2008, 04:10 PM
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If your system is self bleeding, the bleeder screw on the valve is used for releasing the pressure in the system prior to working on it and can also be used for fluid flushes.

In order to bleed the air from my SLS, I jumped on the rear bumper about a hundred times. The rest of the air came out during normal driving.

The only thing that rotating the arm does is change the position of the cam lobe in the valve. You could rotate it as many times as you want and it won't hurt anything, unless you unseat an o-ring while doing it.
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2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

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1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
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Old 08-23-2008, 05:58 PM
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make sure the arm is not slipping on the valve.
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  #8  
Old 08-23-2008, 06:18 PM
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Mobetta,
am i right in suspecting from your suggestion that you mean i have to open up the sls unit. i just can't do that, i can't get it off without causing all sorts of other collateral damage! it's just so rusty up there. why oh why did mercedes ever think it was a good idea to put such delicate but important mechanics outside the car, unlike the spheres which are nicely protected inside it?
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Old 08-23-2008, 08:02 PM
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He means the arm that you were rotating around. That arm is screwed to the shaft of the cam in the SLS valve with a bolt. If the bolt is loose, the arm could be slipping on the shaft and wouldn't make the cam turn around.

If this is the case, the cam could be in the fill position.

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2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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