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

To: Triumphs <triumphs@autox.team.net>
Subject: Re: Leaking Pressure Differential Warning Actuator (PDWA) on '78 Spit 1500
From: "Power British Performance Parts, Inc." <britcars@powerbritish.com>
Date: Fri, 05 Feb 1999 12:55:01 -0500
References: <000901be511e$cade7d40$6788170a@c53808a19533.amfam.com>
Michael L. Coop wrote:

> Hello Listers, I'm still working on the brake system rebuild on my '78 Spit.
> Last night, I finished reinstalling the newly re-built calipers, repco pads,
> new shoes, new wheel cylinders, turned rotars and drums, and braided
> stainless steel hoses.
>
> About 3 years ago, I had already replaced the master cylinder with a new
> one.
>
> As my helper and I began bleeding the brakes, we noticed that we were making
> very little progress in achieving a good amount of brake pedal.   We started
> with the longest line (right rear) and proceeded sequentially to the next
> longest line until all lines had been bled.
>
> While topping up the reservoir, I happened to notice that the PDWA unit was
> leaking brake fluid.  At first, I thought perhaps the Master Cylinder had
> overflowed onto the mounting surface of the PDWA.   So, I thoroughly cleaned
> up the fluid and began bleeding the system again.
>
> Sure enough, the PDWA is definitely leaking.   It appears to be leaking from
> the area where the electrical snap connector attaches to the unit.
>
> I don't have a clue where to find a replacement PDWA.  I don't think they
> are in production anymore.   And, Haynes and Bentley both say they aren't
> re-buildable.
>
> HELP!   Anybody got a good idea about how to solve this problem?
>
> Mike Coop
> Michael Coop Agency, Inc.

Mike,

You can remove the big plug on the one end and remove the shuttle (take out the 
switch
first).  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.  Be sure that you center the shuttle before reinstalling the switch.

Good luck!

--
Regards,

Brian Schlorff    '61 TR-4     '64 TR-4     '72 TR-6     '79 Spit
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