I was so frustrated the last time I did this I disconnected the plug from the
sensor, carefully unscrewed the sensor, centered the plunger/slider put in a
few drops of brake fluid, and put the sensor back in then reconnected the
plug. Worked fine.
Andy
On 05/01/98 05:16 PM Dennis F. Kimberlin said...
>
>Andrew Mace wrote:
>>
>> On Fri, 1 May 1998, Andrew Dixon wrote:
>>
>> > On the topic of the PDWA, I firmly believe one should go through the
>> > centering technique whichever method one uses. It's purpose is to
shift
>> > braking power from a leak in the front or rear.
>>
>> Well, no, not really. The Pressure Differential Warning Actuator (Warning
>> being the keyword here) only serves to indicate a problem in the system.
>> If there is any "fail-safe" at all in the braking system relative to
>> shifting braking power from a leak, that would be in the dual master
>> cylinder (I think that is what the "tipping valve" does.)
>>
>> > When you bleed the brakes
>> > you create a leak and I've found any method causes the PDWA to shift.
>>
>> Again, you don't create a leak when the PDWA shifts. All you do is
>> activate the warning light circuit by means of a mechanical shift of bits
>> within the PDWA. Perfectly normal brakes can be experienced with the
PDWA
>> "uncentered." And it is quite possible, although not always easy, to
>> bleed brakes successfully without disturbing the PDWA.
>>
>> I'll grant you that sometimes it is as hard or harder to recenter the PDWA
>> than it is to get it "uncentered" during bleeding. And I'll also grant you
>> that when the PDWA itself DOES start to leak, you've got a whole new set
>> of problems!
>>
>> --Andy
>>
>> * * * * * * * * * * * * * * * * * * * * * * *
>> * Andrew Mace, President and *
>> * 10/Herald/Vitesse (Sports 6) Consultant *
>> * Vintage Triumph Register *
>> * amace@unix2.nysed.gov *
>> * * * * * * * * * * * * * * * * * * * * * * *
>I agree with Andy. Same issue on my SPIT; brakes are great after a
>complete rebuild, but could never get the !@#$%PDWA to recenter. The
>bleeding went without a hitch on each cornor.
>One good thing, I guess....got a pretty red light glowing when we run.
>I'm told there is a manual method to recenter the thing, i.e. remove the
>end cap nuts, but haven't screwed the courage up to do that yet.
>Anyone ever do it that way?
>
>Dennis
>75 SPIT
>Omaha, NE
|