DeTomaso Mailing List: April 99, Message #130

FOREST W GOODHART wrote:
> 
> -- [ From: forest * EMC.Ver #2.5.3 ] --
> 
> I just can't let this misconception go on any longer. The brake
> differential pressure switch is just that, a switch. It does not block
> flow from a broken or ruptured system.

Whoops, I gotta disagree with that.  I had just such a failure and the
Diff/Press valve (switch) did just like it was supposed to: sensed the pressure
difference, moved to that side, the BRAKE light came on and I stopped leaking
fluid out the rear wheel cylinder.  For all intents and purposes, the flow of
fluid was stopped to the rears.  And according to my internal mechanical
diagrams... it's supposed to do just that.

The point made about really having to slam the brakes to get it to center once
the repairs have been made is TRUE.  Once I got the system fixed (and rebuilt
the diff/press switch) the system still showed a failure.  Then I read the
factory manual which recommended "slamming" the brake pedal... so I did. 
Viola!! the light went out, and I had fantastic braking again.

I for one, would not take the switch out, I'd disassemble it, clean it, and
rebuild it.

FWIW,
Asa Jay



-- 
Asa Jay Laughton
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