What pressurizes the hydraulic shocks? - Benzworld.org

pcmaher · 06-29-2004, 07:29 AM

I've been searching for technical details on the operational aspects of the hydraulic shocks on my 1995 S600. There is a lot of conflicting info out there. Does the power steering pump supply the pressure for the shocks, or is there a seperate pump? I know there are two seperate reservoirs for these systems, but that's all I'm sure about. I would really appreciate a knowledgeable person to bring me up to speed on how these systems work.

Brett San Diego · 06-29-2004, 08:58 AM

the power steering and ADS system run off what is called a tandem pump. It is two separate pumps built into a single housing that run off a single pulley driven by the poly-rib belt. The pumps run two separate hydraulic circuits with different fluids for power steering and ADS/self-levelling. The power steering reservior is located right on top of the pump housing located (it appears from some curtailed diagrams I have access to) on the left hand side (US driver's) of the engine. The suspension reservior is located just forward of and above the left wheel well with a removable hatch in the plastic cover specifically for access to it for filling.

Brett

Peter Guenther · 06-29-2004, 09:07 AM

99% correct except on the 600s the power steering resovoir, is on the intake manifold with a black screw cap

Brett San Diego · 06-29-2004, 09:42 AM

diagrams are not specifically from the 600.

Brett

pcmaher · 06-29-2004, 11:39 AM

Thanks guys. I understand now. Are there filters in these circuits that require routine replacement?

Merc600sec · 07-01-2004, 05:04 AM

Did some pics on this on my gallery, the shocks suspen sys has a filter in the resevoir, and one on each rear shocker .
the filter in the res is a magnet and gauze. if it is black you may have some probs.

pcmaher · 07-01-2004, 05:17 AM

Nice gallery Merc600sec! Your pics illustrate the system nicely. When I checked the oil, a minimal amount registered on the dip stick. I'm not sure if the reservoir was empty, or just barely full. I put in about 1/2 liter to get the fluid level to the mid mark on the dip stick. Is it possible that there is air in the system? If so, how can I tell? I seem to remember seeing an article stating that this system needs to be bled if air gets in it. Do you think this is necessary? How is this done?

Benz-Friend · 07-01-2004, 07:18 AM

PCMaher: How did you get to see MERC600SEC's gallery? I see no link in his remarks.

I appreciate your response.

Brett San Diego · 07-01-2004, 08:17 AM

pcmaher · 07-01-2004, 08:19 AM

I see someone got you the answer already. These guys are fast!