Re: Hydraulic pumps

[jakov@myri.com (Jakov Seizovic)]

> > 
> > The real bad news was that when I took off the noisy pump, it was full of
> > tiny metal pieces (surprise, I wonder where the noise was coming from), so
> > I bought a new filter, flushed the system twice, and am holding my fingers
> > crossed that the rack didn't go while it had the metal junk coming through
> > it at 200 bars.
> > 
> > 	Jakov
> 
> Jakov,
> 	Is the filter you are refering to the one in the reservoir? Or is
> there another one? The plastic filter in the reservoir has a couple of
> vertical slits along its length which seem to defeat the purpose. I couldn't
> figure out how this could possibly trap anything reliably.
> 
> Also, how do you flush the system? When I replaced the pressure accumulator,
> I drained the reservoir and filled it with new fluid. Is there a procedure
> for getting all the old fluid out of the rack and the pump?
> 
> Zafer
> 
> 87 5000 CS TQ
> zm@mhcnet.att.com
> 

Zafer,

yes, the filter I am referring to is in the reservoir, and I don't think it
is very helpful either. The best it can hope to do is protect the pump from
the pieces in the rest of the system, but not the other way around. There is
a metal screen in the banjo bolt on the pump end of the hose that feeds the
brake accumulator and booster, so at least they were safe (I replaced the banjo
bolt, too). As far as flushing the system, I don't know of any procedure
(I guess they didn't expect their hydraulic system to be quite as bad as it
turned out). The procedure that I followed when I found metal pieces in the
fluid drained out of the pump was: 1) freak out and curse the stupid design;
2) disconnect all the hoses that I could get to and curse the stupid design;
and 3) drain the fluid and hope for the best.

I guess I could have taken the power-steering rack off and made sure that
everything was out.


	Jakov