Re: Hydraulic pump rebuilt by ZF, and others..

[Alan Cordeiro <cordeiro@avlna.com>]

At 03:49 PM 3/12/96 GMT, you wrote:
>The subject of the hydraulic pump leaking has beeb discussed many
>times
>before but today I got some intersting news which I want to share with
>the list:
>the hydraulic pump on my 200Q modell89 part no 034 145 155 C is
>leaking from 
>the 'X' screws just slightly.
>My local AUDI dealer offered a new pump for 435$ plus labour and he
>stated
>that there is no rebuilt kit available. The only chance is to replace
>the
>complete pump. I called the AUDI service telephone and they basically
>sayed the same thing: No chance for repair , go get a new pump.
>My next step was to call ZF , the manufacture of the pump , and they
>have
>rebuilt kits and also a rebuilt service available. The guy from ZF

>* Hans-Juergen Schneider   *
>* hschnei@ibm.net          *


1. It is possible to rebuild the pumps yourself. Carlsen ( Linda ) will
sell you an original Audi kit for ~$25. PAP will sell you a kit for
$15 on sale, but it is locally pieced together. The biggest problem
in rebuilding was getting the "X" caps out, ( in my case, original
pump, never opened, '86 vintage )

Change EVERY SINGLE O-RING in the pump, don't forget the one below the pressure
relief valve.

Take EXTREME CARE with cleanliness. One technique I used was to keep the rubber
O-rings DRY, and ONE of the mating surfaces of a rotating pair dry as well.
( i.e. a pair of surfaces that move relative to each other during re-assmbly ).
This helps keep the O-ring in place when you screw back the "X" caps, if they
are slippery, they may "squirm" a bit and get twisted while you tighten
them down. And I do mean TIGHTEN THEM DOWN. I ignored the torque specs., figured
that someone at the factory had really tightened them to get me the 8 years
of leak-free service, and I could put it back the same way.
 

2.PAP will sell you a locally re-built pump for $179 ( on sale... or with a bit
of persuading.) They speak highly of their re-builder.


3. Your friendly local dealer......  ( try Carlsen unless you are on great terms
with your local dealer.


Alan Cordeiro
'86 5kTQ, 
no longer keeps opening the hood to check for leaks...