Author Topic: SOLVED: Bus Won't Air Up  (Read 7775 times)

Offline buswarrior

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Re: SOLVED: Bus Won't Air Up
« Reply #45 on: April 17, 2019, 01:38:52 PM »
The discharge muffler on an MC9 should catch "normal" amounts of oil. So long as you "Drain Daily" ... only a really bad compressor will get oil to the drier.

The desicant will withstand a little, since oil mist is a reality of operation. But a soaking will render the "desicant" function useless.

What are you getting out of the "Drain Daily"?

Happy coaching!
Buswarrior
Frozen North, Greater Toronto Area
new project: 1995 MCI 102D3, Cat 3176b, Eaton Autoshift

Offline GnarlyBus

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Re: SOLVED: Bus Won't Air Up
« Reply #46 on: April 17, 2019, 02:20:14 PM »
This is the drain daily rear discharge muffler, right? Does it purge on it's own at all? It does have some wet oil slobber evidence.

This is the rear tank drain as well, right?

I'm installing pull cords on my front tanks later and the under driver tank is easy. Expecting lots of junk to come out of the front tanks today and then I can monitor them in the future and see how much is making it past the dryer.
1984 MC-9 w/ 6v92TA & Allison 740
Oregon Summers & Arizona Winters
Full-Time since 2015

Offline chessie4905

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Re: SOLVED: Bus Won't Air Up
« Reply #47 on: April 17, 2019, 02:41:06 PM »
At least first time, open tank drains and leave them open at least overnight to completely drain any oil / residue.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline GnarlyBus

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Re: SOLVED: Bus Won't Air Up
« Reply #48 on: April 19, 2019, 10:49:59 AM »
Fired up the bus today and the bus air is working properly again! The air dryer is purging properly again.

I drained the tanks for about 30 seconds each for the first time ever and nothing but a short burst of moisture left the wet tank. Other tanks were just air. Adding pull lanyards so I can be on top of draining these every time.

Thanks everybody for the help!

Also, I added a psi gauge near the discharge muffler to make sure the compressor was cycling.
1984 MC-9 w/ 6v92TA & Allison 740
Oregon Summers & Arizona Winters
Full-Time since 2015

Offline Jim Blackwood

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  • I'm 25% Farnsworth ;-)> 1996-MCI 102DL3
Re: SOLVED: Bus Won't Air Up
« Reply #49 on: April 19, 2019, 11:06:16 AM »
Thanks for leading the way. I'll be following up on my own system later.

Jim
I saw it on the Internet. It MUST be true...

Offline buswarrior

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Re: SOLVED: Bus Won't Air Up
« Reply #50 on: April 19, 2019, 12:05:09 PM »
This is the drain daily rear discharge muffler, right? Does it purge on it's own at all? It does have some wet oil slobber evidence.

This is the rear tank drain as well, right?

I'm installing pull cords on my front tanks later and the under driver tank is easy. Expecting lots of junk to come out of the front tanks today and then I can monitor them in the future and see how much is making it past the dryer.

Manual valve. Feel free to replace that one pictured with something that has a handle.

Mind your shoes and pant legs, there's likely going to be a big mess blasted out of there.

No, it isn't connected to the rear tank. It is inline to the air drier.

happy coaching!
buswarrior
Frozen North, Greater Toronto Area
new project: 1995 MCI 102D3, Cat 3176b, Eaton Autoshift

 

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