Help brake switch vacuum pull to much

[Jamous]

Thanks for the info 

[halboyles]

5 hours ago, Henning said:

Seems to me that there's a nut missing.

Definitely.  There has to be a thin nut on both sides of the bracket in order for it to be adjusted properly.

[Jamous]

I know the switch isn't the problem ! I was just asking if this is normal as it was a project car with many parts missing . 

And it had the wrong brake switch in place before I purchased this from Rotterdam.

 

Need a servo now , and one other thing are all the servos interchangeable as in LHD and RHD being the same . 

 

Thanks Jaime 

Plymouth 

[Jamous]

Yes there is a nut missing because I was trying to get the most adjustment possible ,this isn't the problem ??

 

Now I know the servo is now the issue which is being pulled by the vacuum .

 

Having a nut missing won't defect the brake light . 

[02Les]

RHD have twin servos, so not interchangeable. Lucky for you, LHD servos are waaaay cheaper.

[Jamous]

I have you got one lol

[halboyles]

18 minutes ago, Jamous said:

I know the switch isn't the problem !

 

There is an easy way to test this.  Unscrew the switch all the way back out and see if the problem persists.

I could be wrong but it appears that the switch is contacting the lever on the the booster.  Maybe it is touching just enough to activate the vacuum valve.

Here's a properly adjusted switch.  Your switch is screwed all the way in in comparison.

[jimk]

+1 on backing off the switch and test the brakes.

The servo has two chambers.  With nothing pushing in the input rod, vacuum is in both chambers.  When the input rod is pushed in past some point a valve opens the outer chamber and air enters and pushes against the diaphragm.  The diaphragm is connected to the output shaft that pushes on the master cylinder.

If the switch is holding the input shaft too far towards the servo, the outer chamber is getting air and the brakes will be applied all the time.

Do the no switch test.  It might save some $$ 

[Jamous]

Ok guys !!! Switch backed off ..

Started engine and the same as above with the pedal .

The servo I need must share the same as other older model cars like escort or similar.? 

 

video attached 

[Jamous]

As soon as it started it shot forward 

[jimk]

So now I can shut up!

[ray_]

11 minutes ago, jimk said:

So now I can shut up!

 

Well I doubt that.

 

 

[stone02]

Hey,

  a quick question. does the foot pedal assembly

have it's return spring in the bottom of the pedal

box? this may be just enough tension to keep

the pedal where it should be. i can not see

the spring below the pedal at the fulcrum point.

let us know.

stone

[Jimmy]

16 hours ago, stone02 said:

Hey,

  a quick question. does the foot pedal assembly

have it's return spring in the bottom of the pedal

box? this may be just enough tension to keep

the pedal where it should be. i can not see

the spring below the pedal at the fulcrum point.

let us know.

stone

 

Pic for reference:

 

 

If that spring is broken or missing, Jimk could still be on to something.

[Jamous]

Thanks the spring is there for sure