A Brake Diaphram

[Joe Cannarozzi]

The front brakes on ALL prevo are standard non maxi single diaphragm brake chamber. Under normal braking they may see 10 or 15 pounds of air pressure, minimal. If it should leak it will only leak when you are using the brakes.

I have never looked here and had no idea if these were original or not so I opened them up. Good thing I did.

Everything is pretty crusty on the surface but very clean on the inside and will easily provide many more years of service with simply a new pancake and rubber brake line.

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You have to check the return spring behind the plunger to make sure it is not overly corroded. This one was fine.
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This is not new but the inside of the original chamber.
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[dalej]

Great photos and post Joe!

[BrianE]

Great post Joe. This points out the fact that when updating chassis components there is no real need to install brand new brake chambers. For the hands on folks, they come apart easily and are easily overhauled. One must be very careful however when disassembling the emergency dual brake chambers.

[phorner]

Great post, Joe.

But I gotta ask.....

Which job is dirtier.....tearin' em apart to re-build?..... or replacin' em?

[Joe Cannarozzi]

Paul, Paul, Paul.

I can't believe you even asked that question.

I could not have been more surprised to crawl under what I defined as one of the best looking and well kept Liberty's in the club (yours), only to emerge dirtier than I have ever gotten on anyone's yet,and 2 days in a row.

Then to add insult to injury you give me hand cleaner with enough grit to rip the first 2 layers of skin off prepping me for the burn of the gasoline you then handed me, and we hear complaints about water-boarding, sheesh.

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I could not get this dirty working on our bus if I tried and it is 15 years older than yours.

In answer to your question I guess it depends on whos I'm working on

[phorner]

I hear ya, Joe....

Was pretty surprized myself to see how much grime one (apparently clean) bus can deposit on a guy. I think the Liberty just enjoyed your touch so much she insisted on leaving her mark

It was fun though.......