Re: Rebuild ZF pump

[e6941tb@gnn.com]

Alan Cordeiro wrote:
> 
> >
> >Mike Arman wrote:
> >
> >> Rebuild the pump - all O rings, and you MUST replace the big one under the
> >> check valve - not in the kit! - get it from a hydraulic supply company.
> >
> >????? where is it? Did not see anything like it inside the pump.
> >
> >Igor Kessel
> >'89 200TQ
> 
> The kit from Linda@Carlsen for about $25 had ALL rings, including the
> one below the pressure relief valve ( set to 150 bar, to bleed off
> excess pressure from the steering servo if the backpressure increases
> beyond 150 bar, like when you turn the steering wheel all the way
> at either end...)

Yeah, I know (see my recent repost). I got that kit for $15 locally this
past Summer.

> Alan Cordeiro
> '86 5kQ, no leaks (from the ZF) for over 1.5 years
> ( other leaks.... will soon consider steering rack rebuild/replace...
> also need to replace the "bomb" one of these days....#$$$ hydraulics)

Along with a P/S pump rebuilt I replaced the bomb, a pressure hose and
rebuilt the rack. You gonna need a coupla special tools, in order to do
the rack. I had to machine mine. If you are serious about rebuilding it
yourself, I can give you the dimensions, so you won't spread the whole
project over a week's time, waiting for a machinist to build the tools.

The rack rebuilt is a fairly complex job. It ain't no simple caliper or
P/S pump rebuild, x-cuze my English here.
But like I said in a previous post, I had some horrible experience with
the hydrolic parts, rebuilt by a third party, so as of several years ago
I either perform the rebuild myself (zero failure rate so far) or bite
the bullet and buy a new unit, if a rebuilt kit is unavailable.

Igor Kessel
'89 200TQ