Self lev. Susp. Pump question ? 97 e3oo td.

[HERBIEMERCMAN]

hi everyone, i have just had new spheres fitted, it made no improvement on the non cushioned very bumpy suspension at the rear of the car. my garage has checked pipes and slv valve and say the tandem pump is only supplying pressure to the power steering, the rear suspension is not getting any oil pressure at all, the bleed nipple on the slv just dribbles oil with engine running. my question is does the slv system not working also cause the new spheres to not work as i still have the bumpy ride problem? i am assuming the pump when working should fill the spheres and rams with oil ? herbiemercman.

 

[GEORGEROV]

Hi Herbie, Suspension will still be bumpy with no cushioning when there is no hydraulic pressure. The spheres have a pressurised gas filled compartment and you need to have pressurised fluid in the adjacent section to enable this gas filled section to compress (as when the wheel goes over a bump) and absorb the shock.

 

[HERBIEMERCMAN]

thanyou george, that's what my suspision was, i am hoping my local garage can sort this on monday. do you know if they have got the flow and return pipes crossed this could make it look like the tandem pump is not working? the power steering is ok and there is a high flow pouring from the return filter in the supply tank. they moved the actator arm on the slv up and down and could only get a low pressure dribble of oil from the bleed nipple. herbiemercman.

 

[GEORGEROV]

Next logical step would be for them to disconnect the flow line to the levelling controller and see if there is pressure there. If that is ok then controller is maybe at fault. Cant see how they can mess up the connections as the steel pipes will have preformed bends to connect to the manifold.

 

[television]

In the bleed instructions it tell you to take care, the engine has to be running, the pressure is high as it says undo the valve slowly. its around 2 bars thats about 30lbs

That Member here called power steering has the pumps and repairs them.

Could the firm that did the pipes have started the car up without fluid in the pump

 

[Number_Cruncher]

If the pump has been run dry at any time, it may need to be re-primed. Unlike the PAS pump with the reservoir above, the SLS pump is sited above the oil level in the reservoir.

 

[television]

If the pump has been run dry at any time, it may need to be re-primed. Unlike the PAS pump with the reservoir above, the SLS pump is sited above the oil level in the reservoir.

I have looked all through the info and MB say just fill and run and its self bleeding, herbie has the tank above, its a mystery as to why it has failed

 

[230K]

Hi

Did you check the filter in the reservoir isnt clogged?

230K

 

[television]

Hi

Did you check the filter in the reservoir isnt clogged?

230K

I was hoping that he would have posted tonight, the fault is an odd one

 

[power-steering]

Agreed an odd fault. I would say check the following if possible the filter which usually resides in the reservoir as mentioned before.. if the oil was contaminated, it could have blocked up this filter.

Also there should be a valve on the pump, check that isn't clogged up.

Also, check the pipes for any restrictions.. it sounds like a straight forward problem but may take some time and get messy trying to figure out what it is.

If we had the vehicle here, those are the things we would be looking in to..

Goodluck

 

[HERBIEMERCMAN]

the garage that changed the spheres also replaced the hyd pipes and got them crossed. when this was corrected by another inde all was ok. herbiemercman.

 

[television]

the garage that changed the spheres also replaced the hyd pipes and got them crossed. when this was corrected by another inde all was ok. herbiemercman.

We would have never got that one