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Author Topic: Front unloader valve.  (Read 8250 times)

Offline Rayj1954

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Front unloader valve.
« on: February 05, 2018, 07:06:25 AM »
Is it possible to get to the valve from the spare tire hold?


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RayJ.   83. MC9

Offline buswarrior

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Re: Front unloader valve.
« Reply #1 on: February 05, 2018, 07:14:11 AM »
What part are you talking about?

Air drier purge valve?

Levelling valve exhaust?

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Buswarrior
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Offline chessie4905

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Re: Front unloader valve.
« Reply #2 on: February 05, 2018, 07:22:02 AM »
You have an MCI? What model?
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Offline Utahclaimjumper

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Re: Front unloader valve.
« Reply #3 on: February 05, 2018, 09:41:22 AM »
 You don't understand folks,, you are supposed to have a crystal ball for these things.>>>Dan
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Offline Dave5Cs

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Re:
« Reply #4 on: February 05, 2018, 10:44:29 AM »
unloaders are in the top of your compressor in the rear.
maybe he is talking about leveling valves and no you can t get to them from there.

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Offline thomasinnv

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Re: Front unloader valve.
« Reply #5 on: February 05, 2018, 10:53:34 AM »
My guess would be that he is talking about the air dryer purge valve. No you cannot access it from the spare tire compartment, u got to get yourself under the bus

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Some are called, some are sent, some just got up and went.

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Offline Rayj1954

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Re: Re: Front unloader valve.
« Reply #6 on: February 05, 2018, 04:14:49 PM »
Quote from: buswarrior on February 05, 2018, 07:14:11 AM
What part are you talking about?

Air drier purge valve?

Levelling valve exhaust?

Help us, help you!

Happy coaching!
Buswarrior
Not really sure. It is just in front of the front axle almost middle of the coach at the bottom of a tank (somewhere near 8 gal). I'm really new sorry. It is 83 mc9. It is down on the bumpers and the valve is stuck open parked on gravel.

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RayJ.   83. MC9

Offline Dave5Cs

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Re: Front unloader valve.
« Reply #7 on: February 05, 2018, 04:20:10 PM »
What type of Bus do you have what area are you close to that someone here might want to help you out if you need it? Look at our profiles at the bottom of our posts. You need to include the coach type you have.
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"Perfect Frequency"1979 MCI MC5Cs 6V-71,644MT Allison.
2001 Jeep Cherokee Sport 60th Anniversary edition.
1998 Jeep TJ ,(Gone)
 Somewhere in the USA fulltiming.

Offline chessie4905

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Re: Front unloader valve.
« Reply #8 on: February 05, 2018, 04:31:52 PM »
Sounds like it could be a drain valve at bottom of tank. Did this just happen? Does it have a cable attached or air line/s? If air lines, how many?
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Offline Rayj1954

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Re: Re: Front unloader valve.
« Reply #9 on: February 05, 2018, 09:34:59 PM »
Quote from: buswarrior on February 05, 2018, 07:14:11 AM
What part are you talking about?

Air drier purge valve?

Levelling valve exhaust?

Help us, help you!

Happy coaching!
Buswarrior
It is possible, I am not sure. It is at the bottom of a tank in front of the front axle.  One of the local mechanics told me there was an unloader valve in the front of the bus when I lost the ability to get the system aired up.  I finally found it and sure enough it is stuck open, (bleeding off all the air).  This beast is on a gravel lot and down on its   bumpers. Can't get a jack in to get it up. Got to get this off and rebuilt or replaced.

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RayJ.   83. MC9

Offline Rayj1954

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Re: Re: Front unloader valve.
« Reply #10 on: February 05, 2018, 09:37:11 PM »
Quote from: chessie4905 on February 05, 2018, 04:31:52 PM
Sounds like it could be a drain valve at bottom of tank. Did this just happen? Does it have a cable attached or air line/s? If air lines, how many?
No cables, an electrical wire  two lines on the tank I can see.

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RayJ.   83. MC9

Offline chessie4905

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Re: Front unloader valve.
« Reply #11 on: February 06, 2018, 03:35:35 AM »
If it looks like this, and hooked to bottom of tank, it is used to eject moisture automatically, every time air compressor cycles.

https://www.amazon.com/Bendix-Automatic-Drain-Valve-281923RX/dp/B0045VITV2
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GMC h8h 649#028 (4905)
Pennsylvania-central

Offline bevans6

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Re: Front unloader valve.
« Reply #12 on: February 06, 2018, 09:09:54 AM »
Sounds like the purge valve on the bottom of the air dryer (which looks like an air tank) is stuck open.
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Offline Rayj1954

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Re: Re: Front unloader valve.
« Reply #13 on: February 06, 2018, 02:17:19 PM »
Quote from: chessie4905 on February 06, 2018, 03:35:35 AM
If it looks like this, and hooked to bottom of tank, it is used to eject moisture automatically, every time air compressor cycles.

https://www.amazon.com/Bendix-Automatic-Drain-Valve-281923RX/dp/B0045VITV2
Thank you very much. Sure looks like it from as close as I can get to it.

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RayJ.   83. MC9

Offline Rayj1954

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Re: Re: Front unloader valve.
« Reply #14 on: February 06, 2018, 02:18:11 PM »
Quote from: bevans6 on February 06, 2018, 09:09:54 AM
Sounds like the purge valve on the bottom of the air dryer (which looks like an air tank) is stuck open.
Thank you...

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RayJ.   83. MC9
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