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RE: Leaking Pressure Differential Warning Actuator (PDWA) on '78 Spit 15

To: "'TR6 List'" <triumphs@autox.team.net>
Subject: RE: Leaking Pressure Differential Warning Actuator (PDWA) on '78 Spit 1500
From: Peter Zaborski <peterz@merak.com>
Date: Fri, 5 Feb 1999 11:19:36 -0700
> From: Power British Performance Parts, Inc.
> [mailto:britcars@powerbritish.com]
> 
> There are two o-rings on the shuttle that seal the 
> center area where the switch is.  These are
> probably bad.  Any good plumbing supply 
> should have the o-rings.

One thing which may not be obvious here... the o-rings should be compatible
with hydraulic fluid. Typically this means something other than the
"regular" o-rings you can get at hardware or auto stores. You have to make
sure they are ethylene propylene (EP) -- usually identified by a red mark on
the rubber.

<http://www.vtr.org/maintain/pdwa.html> has a write-up of the process to
rebuild the PDWA. Good article IMO.

Centering the PDWA is best accomplished by ignoring the Haynes/Bentley
instructions and just using a pointed object (like a straight pick) to
manually center the shuttle after the switch is removed. Quick, painless and
very efficient.

--- Peter Zaborski  CF58310UO ---

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