Sinking brake pedal at stop light.

[Shoelessjoe]

Hey Guys, I was driving my dads 100 today and noticed the pedal soften and sink while at a stop light. I have read through all the threads that I can find and plan on doing a master cylinder rebuild and sending my booster motor to Eurton to be rebuilt. I have seen some reference to replacing the accumulator right away and was wondering if thats a good choice or an unnecessary expense?

Truck is a 2003 with 281,XXX on the clock.

Any thoughts would be greatly appreciated.

Thanks, Joe

 

[Bomar]

Just replace the unit with new. It will be the best $2300 you can spend.

 

[Shoelessjoe]

Thanks for the recommendation but I am mechanically inclined and willing to do the work if it means saving $1500 or so. At this point i really just need to know if I should order the accumulator right away or if the old one is good to reuse.

Thanks,

 

[FxFormat]

Try to rebuild it first with the kit, only $60 or so. What other symptoms do you have besides sinking peda, any bubbling in the reservoir, any excessive noise, screeches, loss of pressure?

 

[bgolf247]

Start with the cheapest and replace the mc first. Fixed it for me.

 

[Shoelessjoe]

The sinking brake pedal at the stop light is really the only unusual symptom. The truck has close to 300k is i just assumed that the booster motor needs to be rebuilt and might as well do an overhaul while Im in there. Is there a rebuild kit for the accumulator? I was under the impression that it was a non-serviceable part.

Joe,

 

[Shoelessjoe]

Start with the cheapest and replace the mc first. Fixed it for me.

Did you have a similar sinking/softening condition while stopped?

 

[bgolf247]

Did you have a similar sinking/softening condition while stopped?

mine was intermittent. Soft pedal (often notice at stopped cause thats when I push the brake pedal). If I pumped then pressure would come back.

 

[Kofoed]

Try to rebuild it first with the kit, only $60 or so. What other symptoms do you have besides sinking peda, any bubbling in the reservoir, any excessive noise, screeches, loss of pressure?

link please?

 

[bgolf247]

part number 04493 60330

I bought mine from partsouq: PartSouq Auto Parts Around the World

Put your vin in so you make sure you get parts to match your year. Can probably get it faster from other sources.