[V8] P/S, hydraulic pump leaks

[bkrussow at comcast.net]

Thanks everyone for suggestions and input. All of it is needed and welcome. 



I'm going with the rebuild kit, new serpentine belt, scrapped knuckles and hard hat. I have a Bentley for my old 5000 so I'll look into that. 



Bob 
----- Original Message ----- 
From: kneale at knitknacks.com 
To: bkrussow at comcast.net, v8 at audifans.com 
Sent: Sunday, June 14, 2009 3:28:23 PM GMT -06:00 US/Canada Central 
Subject: RE: [V8] P/S, hydraulic pump leaks 

I'd guess your pump is leaking from one of the mushroom caps you can't see 
while it's in place. 

The pump can be rebuilt.  Last kit I bought was $6 from Autohausaz.  It did 
include the shaft seal.  I've never seen a shaft seal leak oil out.  What 
they normally do is suck air in, causing the oil to foam up.  The resulting 
froth contributes to the famous Pentosin Volcano. 

I don't believe you can source a new pump.  They'll all be rebuilt. 
However good that is depends upon the rebuilder.  I'd only trust a know 
rebuilder or one from ZF itself. 

Be aware the V8 version of the pump is V8-specific.  No other pump will fit 
into the bracket, at least not without grinding away part of the body of a 
5k/100/200 pump. 

The Bentley for Type 44s has a great writeup on pump resealing.  You'll 
need a press if you decide to do the front seal because you have to remove 
the pulley flange, which is pressed into place. 

  

Original Message: 
----------------- 
From:  bkrussow at comcast.net 
Date: Sun, 14 Jun 2009 19:35:56 +0000 (UTC) 
To: V8 at AUDIFANS.COM 
Subject: [V8] P/S, hydraulic pump leaks 




Some background, 1990 V8q, 71k miles. Not many miles but still pushing 20 
years old. Here is the problem I need the collectives help with. 



The P/S--Hydraulic pump is leaking, No visible leaks at or around the hoses 
never been touched since Hans torqued them on in DE. No leaks from the 3 
screw caps I can see. I think it may be leaking from the shaft seal, down 
to the A/C compressor, to the ground or blown back to the exhaust and then 
smokes comes out the lt frt . The serpentine belt is wet with the oil. 



Of the repair options out there, which one you lean towards, 

1. Buy a rebuilt from local parts store 

2. Re-seal this one and hope it works, ( if its the shaft seal is that part 
of the kit ) 

3. Send this pump out to a authorized ZF rebuilder 

4. Trade the V8 in on a Peogout, since after Lemans, ALL IS LOST 



Thanks, Bob 
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