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LX and LXI (Unique Issues) If you have a unique issue with your LX or LXI model coach and it can't be answered in one of the other forums here, then this is where you can list it, WITH THE EXCEPTION OF THOSE ISSUES INVOLVED WITH ANY LAWSUIT.....list your LX and LXI Parts here too.

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  #31  
Old 11-23-2018
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by Dieselbird01 View Post
Thanks Thomas - hopefully this thread will discourage the use of 3030 diaphragm type spring brake chambers on coaches that came with 3036 piston type spring brake chambers.
I agree with you John.
But in a pinch,you can use a 3030 to get home.
But now that i understand the MGM piston type,thats what i will use.


Good thread,and good info.
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  #32  
Old 11-27-2018
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Originally Posted by rshrimp View Post
I have been doing the research on Brakes lately.
Here is what I learned.
On a Chamber with a parking brake, the first number is the service brake size and the second number is the parking brake size.

The number is the number of square inches of diaphram/piston surface
(Square Inches) x (PSI) = (Pounds of Force)

The other factor in brake application force is the length of the slack adjuster. The standards are 5.5 and 6 inch. The longer one will apply more torque to the s-cam.
Swapping between a 5.5 and a 6 inch Slack is like going half way between diaphram sizes.

I had not considered lag time in going from a 30 service to a 36 service. (Thanks John, I learned something here too)

My bus currently has 3030 Piston styles and 5.5 inch Slacks.

My take is this:
If you have 5.5 inch slacks and think you need more drive brakes, go to a 6 inch slack.
If yo are going to replace your chambers I see no down side to more parking brake force (3036) which you would also get with longer slacks.
Did you change to the 3030's or were they on when you bought the coach?
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  #33  
Old 11-27-2018
rshrimp rshrimp is offline
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3030 piston style MGM's that look original with 5.5 inch slacks.
I am going to leave those and switch to 6 inch slacks.
That extra 1/2 inch of leverage on the S-cam will add a bit of braking and spring pressure.
I purchased Bendix Slacks and they require a new Clevis because the hole spacing is different. My drives use a 5/8 offset clevis.

By the way, I drove the bus 250 miles over Thanksgiving and am happy with the tag brake mod.
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  #34  
Old 11-27-2018
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Quote:
Originally Posted by rshrimp View Post
3030 piston style MGM's that look original with 5.5 inch slacks.
I am going to leave those and switch to 6 inch slacks.
That extra 1/2 inch of leverage on the S-cam will add a bit of braking and spring pressure.
I purchased Bendix Slacks and they require a new Clevis because the hole spacing is different. My drives use a 5/8 offset clevis.

By the way, I drove the bus 250 miles over Thanksgiving and am happy with the tag brake mod.

So,i wonder if the 3030 is an LX thing?
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