MCI C-3 Brakes

luvrbus · November 24, 2016, 05:51:34 AM

Did the C-3 use spring brakes or DD-3 my parts manual just shows the DD-3 for the 1986

sledhead · November 24, 2016, 06:50:56 AM

my 1990 has DD-3

dave

luvrbus · November 24, 2016, 07:10:25 AM

Quote from: sledhead on November 24, 2016, 06:50:56 AM
my 1990 has DD-3

dave

Thanks Dave that kinda confirms what I was thinking without seeing the bus someone has converted it over to Maxi spring brakes since he tried a regular spring brake and it is too long.
That is going to be hard chamber for me to find for him unless some Eagle person has one laying around

olebusman · November 24, 2016, 10:33:29 AM

Try Rochester City Lines in minneapolis (507-288-4353). He had some mini max stuff. olebusman

luvrbus · November 24, 2016, 10:48:06 AM

Quote from: olebusman on November 24, 2016, 10:33:29 AM
Try Rochester City Lines in minneapolis (507-288-4353). He had some mini max stuff. olebusman

Thanks a bunch

Dave5Cs · November 24, 2016, 05:07:33 PM

Clifford if they don't have it try my place its in West Sacramento and they have everything including rebuilding DD3's if you ever need that. Capital Clutch and Brake. All Commercial supplies.
http://www.ccbparts.com/
Dave

Scott & Heather · November 24, 2016, 09:05:32 PM

Cliff,

was this for me? I'm trying MCI dealer in Dallas Monday morning first thing. My 1992 has spring brakes from what we've seen. Two air ports and they apply the brakes below 40psi. Any other way to tell for sure?

brmax · November 25, 2016, 03:29:15 AM

Not saying it has been changed but if,
On standard spring brake chambers there is a typical inspection plugged hole on the end. This can be the access to use the tool caging the (high tension spring) many times it can be caged, with the insert and turn clockwise to lok a bit and verifying this, its like a half turn then holding to tighten the cage nut about 3"
I have found many times these springs to be broken and making it difficult to caged during r&r.
When this happens many ops would notice a slow release in a wheel and possible skidding on that one. Not all! notice and a very good inspection point, so if the part to use cage bolt is jacked to the side its history 95%time and caution needs stepped up for removal. Of course the park brake app on that wheel also compromised.
So anyway a photo of chamber always good, to add the hose connector casting is (round for short stroke, square on long stroke) long stroke is really made for a certain brake shoe like q+ I believe one of the terms and could be more.
So if it parking knob pops out on its own at low pressure like 30psi after a low air light and then a noise signal its a typical spring brake system.

Try to have a good weekend there
Floyd

luvrbus · November 25, 2016, 06:43:03 AM

He only has 2 air lines going to the chambers like springs brakes,the Maxi is not hard to install a new diaphragm and the spring seems to never break in one

Scott & Heather · November 25, 2016, 06:46:35 AM

I'm trying to figure out without climbing under there at the moment which I truly have....if I had DD3's and I had all my air dumped (reading 0 psi on gauge) would the coach roll?

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eagle19952 · November 25, 2016, 08:09:31 AM

would the coach roll?

it could...if the brakes are mal-adjusted or if you only made a soft application, or no application or a combination of the three.

even spring cans will not hold if not properly adjusted.
there are two things always in easy reach of he seat on travel days.
a tire pressure gauge and a 9/16" wrench

luvrbus · November 25, 2016, 08:15:34 AM

Quote from: Scott & Heather on November 25, 2016, 06:46:35 AM
I'm trying to figure out without climbing under there at the moment which I truly have....if I had DD3's and I had all my air dumped (reading 0 psi on gauge) would the coach roll?

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It shouldn't and a DD-3 will apply when the air pressure is low too,get me a photo

brmax · November 25, 2016, 09:33:35 AM

My phone is to old to invest in accessories, But you must have one of them there selfie sticks to take group pictures.
I just let the younger ones chatter about who gets to take a pic as they have the hi dollar phones. (I'm happy with my old antique qwerty keyboard Samsung)
I ate to much pie and cannot fit, also

Floyd

Dave5Cs · November 25, 2016, 03:32:56 PM

dd3 have 3 hoses going to the can. yes the emergency will apply if air is below 65 lbs.

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Scott & Heather · November 26, 2016, 10:22:37 PM

I only
Have two lines going to the can. Brakes do not apply when below 65 psi but the parking brake knob pops out around 40 psi or so. Cliff is going to make me climb under there and get all dirty. Just great lol

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