[Mgs] Brake pressure balance switch

[David Ambrose]

My '69 is like this too. Easiest thing to do is to unscrew the switch, 
and look in the hole. If fluid comes out, you need to rebuild that unit. 
If there is a groove right in the middle of the hole, All is good with 
the hydraulics. You might be able to get a small screw driver in there 
and recenter the piston. I believe it can get pushed off to one side 
when you bleed the breaks.

Rebuilding that imbalance detector is easy, once you get it out of the car.

Cheers,
Dave Ambrose


On 6/8/2018 5:30 AM, Hans Duinhoven via Mgs wrote:
> The switch (in my 71 BGT) is actuated by a kind of piston in the hydraulic circuit.
> The piston is housed into a front - back cross brake line connection, where the piston will not be moved from its center position, when the pressure at both sides is equal.
> The piston has at both sides o-rings, which have the function for building the pressure, like the piston rings in an engine.
> If one of these rings is faulty (leaking), the actuator will be moved and will actuate the brake pressure switch.
> In my 71 BGT these o-rings can be replaced easily.
>
> Cheers,
> Hans
> 71 BGT NRG WW
>
> -----Oorspronkelijk bericht-----
> Van: Mgs [mailto:mgs-bounces at autox.team.net] Namens Charley Robinson via Mgs
> Verzonden: vrijdag 8 juni 2018 1:41
> Aan: PaulHunt73; MGS
> Onderwerp: Re: [Mgs] Brake pressure balance switch
>
> Not so;  if the rear brakes aren't working then the brake balance
> sensor/switch is doing its job.  If I found out that both front & rear
> brakes were working normally then I'd start looking for the reason for
> the false indication.
>
> CR
> On 6/7/2018 2:04 AM, PaulHunt73 via Mgs wrote:
>> Of course.  But that's a different issue to why the balance light is on.
>>
>> PaulH.
>>
>> ----- Original Message -----
>>> Not necessarily. She's driving the thing. I'd want to know if the
>>> rear brakes are working. Obviously the front brakes are working or it
>>> wouldn't stop. As to turning the wheels, I know how to multiply
>>> force. ;-)
>>>
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