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Packard Don

Re: Mojave Tan - A 1956 400 Saga

#121

Home away from home

It's best to rebuild or replace brake cylinders in pairs anyway but be sure that whatever you do, you use the size specified.

Posted on: Today 16:11

kevinpackard

Re: Mojave Tan - A 1956 400 Saga

#122

Home away from home

Quote:

Pgh Ultramatic wrote:
Yes but there is a proportion of master cylinder volume and wheel cylinder effective area that needs to be maintained so that the master cylinder has enough fluid to extend the wheel cylinders, yet they can back off sufficiently when the brake is released.

Though, since the brake springs pull the cylinders "in" when brake pressure is off, I don't think you could easily get past the baseline "off" position in the wheels, so there would never really be enough fluid in the master to extend them all.

So it's possible that the larger size of cylinders makes it so the master runs out of fluid before the brakes are fully engaged. This makes sense with what I was seeing on my test drive. As seen in the video, braking at 50 mph was only slowing me down so much, even with the pedal fully applied. New cylinders, proper adjustments, and bleeding will hopefully solve an those issues.

Posted on: Today 20:17

Pgh Ultramatic

Re: Mojave Tan - A 1956 400 Saga

#123

Home away from home

What I find a little odd is that the BTV was the same for both Clipper and Packard so running the Clipper rear cylinders shouldn't be a problem, in that regard. Perhaps someone put fronts on all 4 wheels.

Posted on: Today 20:39

kevinpackard

Re: Mojave Tan - A 1956 400 Saga

#124

Home away from home

Quote:

Pgh Ultramatic wrote:
What I find a little odd is that the BTV was the same for both Clipper and Packard so running the Clipper rear cylinders shouldn't be a problem, in that regard. Perhaps someone put fronts on all 4 wheels.

I'll measure when I get the old ones off, but I'm thinking they are at least 1 1/8" in the rear which is larger than the Clipper. Plus the Clipper had 11" drums vs the 12". Not sure how much of a difference that makes in regards to cylinder size.

Posted on: Today 23:41

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