Print Page - Replacing E-1 brake application valve with an E-3

Title: Replacing E-1 brake application valve with an E-3
Post by: MC7S50 on April 13, 2007, 07:19:05 AM

I need to change the E-3 brake application valve on my MC-7 because it sometimes leaks quite a bit of air. Has anyone done this job? I am wondering how long it will take to do it.

Thanks

John

Title: Re: Replacing brake application valve on an MCI
Post by: Brian Diehl on April 13, 2007, 08:42:05 AM

I replaced the one on my 96A3. Other than being hard working in the spare tire compartment it is not a bad job. I would allocate about 2 hours to do the job. It shouldn't take you much more than an hour is all fittings come apart easily. Let us know how it goes.

Title: Re: Replacing brake application valve on an MCI
Post by: MC7S50 on April 13, 2007, 08:05:28 PM

Today I found out that my bus still has the original E-1 brake application valve on it. This is apparently no longer available and must be upgraded to the E-3 valve.

Has anyone done this conversion?

Title: Re: Replacing brake application valve on an MCI
Post by: JackConrad on April 14, 2007, 06:01:23 AM

Before you change the valve, make sure it is the problem. I had a bad parking brake valve that would cause air to leak out the bottom of the brake application valve (I think it leaked when the parking brake was applied). I found this AFTER I replaced the application valve. Also, I think you will find that the E3 is capable of applying more braking force. When I changed mine, a replacement E1 was available, but had to be ordered. Can't help with the conversion difficulty. Jack

Title: Re: Replacing E-1 brake application valve with an E-3
Post by: MC7S50 on April 14, 2007, 08:27:14 AM

Thanks, Jack. It may be the parking brake valve. The air leaks out of the exhaust port on the back of the E-1, and it does seem to be while the parking brake is applied. I will do some more testing. I have heard that the E-3 does increase the air pressure available for brake application. That might be a good thing. It looks like the air lines would have to be modified and several ports on the E-3 would have to be plugged off.

Title: Re: Replacing E-1 brake application valve with an E-3
Post by: captain ron on April 14, 2007, 09:54:39 AM

I replaced one of those valves on mine, MCI sent me the wrong valve and said they didn't have what I needed. I took the old one to NAPA and they had it and was very reasonable. It was a 15 minute job. Mine was right below the E. brake and only leaked when the brake was released if I remember correctly. It was a black plastic valve.

Title: Re: Replacing E-1 brake application valve with an E-3
Post by: LUKE at US COACH on April 16, 2007, 04:19:34 PM

Hi John and Folks:

John, if you determine that in fact your E-1 valve is the problem, we do have them rebuilt in stock. You can call us toll free at: 1-888-262-2434.

I Hope this HELPS!!!

Happy and SAFE!! Bussin' to ALl.
LUKE at US COACH

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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: MC7S50 on April 13, 2007, 07:19:05 AM