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Master cylinder questions...       #: 175
 Moderated by: NoPower, Mike69, MaDMaXX
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 Posted: Tue Nov 14th, 2017 05:09 am
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Undrstm8ed
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So the Master Cylinder I believe is the culprit. Since I've had the truck at anytime I'm sitting at a light or at a stop. After a moment or so, the pedal will slowly sink some leading me to believe the Master is failing. Everything from the rear to front in brakes is new with exception of front calipers and now front brakes.

My question is; 4x2 models use a 0.938 in master bore and the 4x4 uses a 0.975 Master bore. I do know from some researching and past experiences that a larger bore isnt always better in some cases.

Anyone have any thoughts in this?




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 Posted: Tue Nov 14th, 2017 02:27 pm
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mhoward
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I would stick with what Ford put on it. But yes, the pedal behavior you describe is the master cylinder leaking past the rubber rings.



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 Posted: Tue Nov 14th, 2017 05:04 pm
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 Posted: Tue Nov 14th, 2017 07:38 pm
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You did check to make sure you do not have a wheel cylinder or a brake line leaking right?. I had the metal brake line rust through back at the rubber hose that goes to the rear end housing.





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 Posted: Tue Nov 14th, 2017 07:50 pm
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Fortunately, I dont suffer from the "rust" belt syndrome however, both rear wheel cylinders were replaced with new when I swapped the 9" drum brakes. And with the few "EMERGENCY" stops ive had to make with dumb-ass drivers both in SoCal and here in Vegas.. I would have blew that line clear off and become a rocket of momentum.. open your  in door because I'm coming through with NO brakes!! lmao

It started about the 2nd-3rd year I had the truck I believe and I've neglected it but now with me looking at doing the 95-97 dual piston brakes and swapping out to a 4x4 frame too if I should consider that as an upgrade/minimal requirements considering the means.



____________________
"Be never first, never last and never noticed." - Unknown

"The slave is held most securely when he is held by the chains of his own will and of his own fears, and when he is locked down by his own slavish desires for a comfortable life." - Michael Bunker

"Mundus vult decipi, ergo decipiatur. Mundus vult decipi, ergo decipiatur" - ~ attributed to Petronius (Gaius Petronius Arbiter (ca. 27–66 AD))
Roman courtier during the reign of Nero.

"Those who expect to reap the blessings of freedom, must, like men, undergo the fatigue of supporting it." - Thomas Paine


~ Undrstm8ed Truckumentry Write Up Pg.

~ Undrstm8ed Trailermentry Write Up Pg.
.
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