PeachParts Mercedes-Benz Forum - View Single Post - Rebuilt SLS Pump -- Still not pumping

layback40 · #3 06-05-2010, 10:38 PM

On a side note first, are you sure you have the correct fluid? The wrong fluid will destroy your accumulators. Hydraulic oil is no good. The proper stuff is expensive but only it works. If you have the wrong fluid, you will need to completely empty the system, flush it out a couple of times & then refill with the correct fluid.

There is a DYI about sls, I see you have looked at Andrews thread.
If you disconnect B1 you should have fluid flow with the motor running.
If not, you need to investigate why. Probably an air lock or blockage in the oil supply
Could you turn the pump by hand before you put it back on? A seized pump will damage the drive to it.
These pumps seldom give trouble. If you have assembled it just the same as you disassembled it, all will be good.

To raise the back a little, when the system is working, you can make an adjustment to the threaded rod that controls the sls valve from the anti roll bar.
My guess is that your height problem is probably failed accumulators, was the car very bouncy in the back?
The sls valve down the back would be my next suggestion, Andrew (the author of that thread) can supply you with a kit of O rings & instructions, dont bother trying to save a few pennies by buying individual O rings, his kit works & his experience & instructions are more valuable than the O rings.
If it does turn out that you have a failed pump, I would try & get one from a junk yard.