[urq] Diff lock actuators: repair

[fdekat]

> Date: Thu, 24 Aug 2006 15:10:04 -0400
> From: "Louis-Alain Richard" <laraa at sympatico.ca>
> Subject: [urq] Diff lock actuators: anyone has repaired the small
> 	rubber	boot yet ?
> To: <urq at audifans.com>,	<quattro at audifans.com>
> 
> Both diff lock actuators (857 711 995A) on my car suffer from a leak at
> the little rubber boot. The diaphragm is OK, as well as the plastic body
> and both vacuum nipples. Audi wants 255$ for each one. 
> 
> So anyone has an idea how can we re-seal the plunger with the body ? 
> 
> The OEM setup is a very thin and supple rubber boot that slips over a
> 15mm plastic tube at one end, to a 3mm shaft at the other end. Overall
> length is 30mm. The stroke of the plunger is 20mm, so the small end fits
> into the big end when compressed. 
> 
> What we need is a "shrink tube"-like material that keeps its suppleness
> over and extended temperature range. 
> 
> Any ideas ?
> 
> Louis-Alain
> Preparing for the winter... 


I repaired the leaking seal on one of my actuators using one of these
'condoms' for caulking gun tubes, from Lee Valley..

http://www.leevalley.com/garden/page.aspx?c=1&p=45858&cat=2,42194,40727

Right kind of price, and still working...!  :-)

Regards,

-Frank de Kat-