Help me - leveling system pump leaks!

[mikaelw2001]

Hello Mecedes-friends,

I posted a message similar to this on the tech help forum without any reply so I really hope that You´re able to help me.

Today I tried to find out where my problem with the leveling system lies. To make a long story short everything works but the hydraulic oil ends up in the engine.

There is no visual leaks anywere in the system (pump, lines, valve, nitro bladders or dampers) and as long as the engine is running the hydraulic oil level stays constant and there is a slow but steady oil return in the reservoir. Once I shut the engine of the reservoir is emptied and the engine oil level goes up.

I´m assuming that somehow the hydraulic pump leaks into the engine and the leakage is aggrevated when the engins shuts off.

Is there anyone that recognises this problem? Is this a DIY job to fix? Is there a rebuild kit for the pump or do I need replace the whole pump?

Please help me out,

Mikael Westerberg
1984 500 SEL
Vanersborg Sweden

[Kebowers]

It has an 'o-ring' seal on the shaft that drives it, and it is repairable.