The Ford Barn

GasWorksGarage · 11-02-2018, 08:53 AM

hello all,

I recently replaced the entire brake system new lines wheels cylinders master cylinder shoes turned drums. I can get a peddle. I can pump it up and it will hold until I release and then right back to the floor. This is the 3rd master cylinder thinking I must have got 2 bad in a row ( doubtful ).
I have bleed over 2 gallons of fluid through it. If I bench bleed the master cylinder it holds until I mount it.

Has to be something I am missing.

Please help!!!

thanks in advance

big job · 11-03-2018, 03:25 AM

The F6 should have a brake booster and thats where the residual check valve is. If you
have no booster then the check valve is in the master cylinder. I still think there is a air
bubble in there somewhere. Sometimes this will work disconnect batt so stop lights
don't come on pump it up put a stick on pedal to the seat and leave it over night. If it
does have a booster that's the first you bleed . Could also be a bad booster piston thats
blowing by its seals. I too have a F6 same symptoms bad booster= Napa About $180 for
a new Bendix may have to redrill holes in the bracket. sam

ponymare · 11-03-2018, 06:29 AM

Just throwing this in, but did you adjust the shoes out against the drums.

GasWorksGarage · 11-05-2018, 08:10 AM

hello,

yes the shoes where adjusted out till a slight drag. no bosster

rich b · 11-05-2018, 08:21 AM

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Sometimes it helps to adjust the brakes out as tight as you can, bleed the brakes, and then back off the adjustment.

11-02-2018, 08:53 AM	#1
GasWorksGarage Senior Member Join Date: Aug 2016 Posts: 168	1952 Ford F6 brake question hello all, I recently replaced the entire brake system new lines wheels cylinders master cylinder shoes turned drums. I can get a peddle. I can pump it up and it will hold until I release and then right back to the floor. This is the 3rd master cylinder thinking I must have got 2 bad in a row ( doubtful ). I have bleed over 2 gallons of fluid through it. If I bench bleed the master cylinder it holds until I mount it. Has to be something I am missing. Please help!!! thanks in advance

11-03-2018, 03:25 AM	#2
big job Senior Member Join Date: Sep 2013 Location: Dighton, Mass Posts: 1,230	Re: 1952 Ford F6 brake question The F6 should have a brake booster and thats where the residual check valve is. If you have no booster then the check valve is in the master cylinder. I still think there is a air bubble in there somewhere. Sometimes this will work disconnect batt so stop lights don't come on pump it up put a stick on pedal to the seat and leave it over night. If it does have a booster that's the first you bleed . Could also be a bad booster piston thats blowing by its seals. I too have a F6 same symptoms bad booster= Napa About $180 for a new Bendix may have to redrill holes in the bracket. sam

11-03-2018, 06:29 AM	#3
ponymare Senior Member Join Date: Sep 2014 Posts: 160	Re: 1952 Ford F6 brake question Just throwing this in, but did you adjust the shoes out against the drums.

11-05-2018, 08:10 AM	#4
GasWorksGarage Senior Member Join Date: Aug 2016 Posts: 168	Re: 1952 Ford F6 brake question hello, yes the shoes where adjusted out till a slight drag. no bosster

11-05-2018, 08:21 AM	#5
rich b Senior Member Join Date: May 2010 Location: Minnesota Posts: 1,827	Re: 1952 Ford F6 brake question Sponsored Links (Register now to hide all advertisements) Sometimes it helps to adjust the brakes out as tight as you can, bleed the brakes, and then back off the adjustment.