Brake pedal slowly goes to the floor when constant hard pressure is put
on it. I replaced the master cylinder because of this, and with the
new unit on it's still doing it. With the pedal on the floor, and the
accelerator pressed the truck does not move. Is this normal or
something to get fixed. I'm pulling an 11000# fifth-wheel. Please
help!
Marsh
.boB - 19 Aug 2006 23:22 GMT
> Brake pedal slowly goes to the floor when constant hard pressure is put
> on it. I replaced the master cylinder because of this, and with the
[quoted text clipped - 4 lines]
>
> Marsh
Did you also replace the vacume booster?

Signature
.boB
Arrived: 2006 FXDI, Red.
1997 HD FXDWG - Turbocharged Stolen 11/26/05 in Denver
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2001 Dodge Dakota QC 5.9/4x4/3.92
1966 Mustang Coupe - Daily Driver
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Chris Thompson - 20 Aug 2006 13:24 GMT
>> Brake pedal slowly goes to the floor when constant hard pressure is put
>> on it. I replaced the master cylinder because of this, and with the
[quoted text clipped - 6 lines]
>>
> Did you also replace the vacume booster?
any fluid leaks in the rear?
I know its an obvious question, but stick with the basics.

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05 CTD
06 Liberty CRD
Real Trucks don't NEED spark plugs.
btsdad@gmail.com - 20 Aug 2006 17:35 GMT
No Leaks, new wheel cylinders and calipers.
I did not replace the vacuum booster.
> >> Brake pedal slowly goes to the floor when constant hard pressure is put
> >> on it. I replaced the master cylinder because of this, and with the
[quoted text clipped - 27 lines]
>
> Real Trucks don't NEED spark plugs.
John Kunkel - 20 Aug 2006 19:39 GMT
> Brake pedal slowly goes to the floor when constant hard pressure is put
> on it. I replaced the master cylinder because of this, and with the
> new unit on it's still doing it. With the pedal on the floor, and the
> accelerator pressed the truck does not move. Is this normal or
> something to get fixed. I'm pulling an 11000# fifth-wheel. Please
> help!
If there are no external leaks, the MC is bypassing internally. There seems
to be a lot of reports of brand new MC's being bad right out of the box.
A booster won't cause the problem you're having.
Scootter - 23 Aug 2006 19:27 GMT
Sounds like a faulty replacement.
It can happen
>> Brake pedal slowly goes to the floor when constant hard pressure is put
>> on it. I replaced the master cylinder because of this, and with the
[quoted text clipped - 8 lines]
>
> A booster won't cause the problem you're having.