[Spridgets] Mighty vac bleeding

[Rick Fisk]

But that is not "proportioning".  A proportioning valve adjusts the bias between the front and rear brakes (either manually as on race cars or automatically adjusting for load bias).  A valve that turns off a blown brake circuit isn't proportioning anything.  Just my opinion....   :-)

Sent from my keyboard

> On Jun 29, 2019, at 5:24 PM, CosmicMag1380 via Spridgets <spridgets at autox.team.net> wrote:
> 
> Respectfully  disagreeing with the terminology... There is a 5 port union in the system that has a shuttle valve in it to close off a side of the system in the event of a catastrophic failure. They came about with the advent of disc brakes on the spridgets. The later models had a warning light sensor built in to them. The early ones didn't have the light fitting. They are often referred to as a proportioning valve as they have equal pressure on all ports until a sudden fluid leak and a good stomp on the brake pedal. If the pressure is low on one side of the system, the shuttle valve is supposed to close off the bad side leaving some braking capacity because of the other side. One front wheel and the opposite side rear wheel makes up the pairs.
> 
> Just my 2 cents if it means anything to anyone,
> Kent 
> 
>> On Sat, Jun 29, 2019 at 4:10 PM Rick Fisk via Spridgets <spridgets at autox.team.net> wrote:
>> Just a small nit guys,  but a couple of you have mentioned the brake "proportioning valve".  No proportioning valve on a Spridget.  The device you're refering to is the PDWA - Pressure Differential Warning  Assembly.  It simply turns on a light to tell you if the pressure is different between your front and rear brakes, no proportioning.
>> 
>> Linda's car does not have one, so ignore all of this Linda.   :-)
>> 
>> Rick
>> 
>> Sent from my iPhone
>> 
>>> On Jun 29, 2019, at 3:05 PM, crusaderchuck55--- via Spridgets <spridgets at autox.team.net> wrote:
>>> 
>>> Ok it works just fine...mine does.  
>>> Everyone is seemingly skipping one valuable step.   
>>> Loosen the bleeder screw, thrn close it just enough that it's closed but not tight!   Attach the bleeder hose and pump up the mighty vav to as much vacume the gauge will read.  Now ever so slightly crack the bleeder screw and watch the gauge on the mighty vav!   Just before it reads ZERO shut the bleeder screw.
>>> Repete until you have a steady stream coming into the bleeder cup.  Close the bleeder after the last pull of fluid and then snug it closed and if ya got one, put the rubber protective cap onto the bleeder nipple to keep dirt out of it and move to the next wheel.
>>> When bleeding a car without a proportioning valve start with the wheel FARTHEST from the master cylinder and work your way forward .  if it has a proportionong valve the same rule applies but you only do front as 1 circuit and then the front as 1 circuit and if the proportioning valve goes off center...recenter it.
>>> Then be certain the master cylinder is at a proper level install the master cylinder cap....
>>> Yer done!
>>> Chuck
>>> 
>>> Sent from my LG Mobile
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> 
> 
> -- 
> Kent
> 1960 Bugeye
> 1983 Garage full of spridget parts!
> 2017 Home built shed full of excess spridget parts!!!
>  
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