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Author Topic: MCI-9 Push-Pull Control Valve  (Read 1948 times)
Kwajdiver
MCI-9 "Kwaj Diver"
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« on: October 18, 2007, 02:12:35 PM »

Hey guys,

The Push-Pull Control Valve, the air value for setting the parking brakes.   Can I rebuild it, or just buy a new one.  If new one, where's the best place to buy it?

As always, thanks for the help,

Bill
MCI-9 1983
In Gulfport, Ms.
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI
FloridaCliff
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« Reply #1 on: October 18, 2007, 02:16:03 PM »

Bill,

Any of the big truck parts places will have them.

I have also seen a lot of them on ebay, but need to find out what a new one costs to see if really a bargain

Cliff
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1975 GMC  P8M4905A-1160    North Central Florida

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buswarrior
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« Reply #2 on: October 18, 2007, 02:27:46 PM »

the price differential between a new brake valve and the rebuild kit is not really worth the labour involved, and you still risk that the insides of your original might have issues beyond a rebuild.

Buy new from your local big truck parts place.

happy coaching!
buswarrior
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ChuckMC9
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« Reply #3 on: October 18, 2007, 04:04:52 PM »

Yup, even I replaced mine. First exposure dealing with the air system. Boy was I intimidated. But labeled each of the lines to prevent idiocy. (or at least to reduce it:)) And it actually worked!

Plus the truck place will give you a pretty significant cost reduction when you return your original body.
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Kwajdiver
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« Reply #4 on: October 19, 2007, 04:33:35 PM »

Thanks guys,  have it on order from a local big truck parts house.  Will have it Tuesday.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI
Tony LEE
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« Reply #5 on: October 19, 2007, 08:04:06 PM »

Just for future reference, what are the symptoms that indicate a faulty valve.
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Kwajdiver
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« Reply #6 on: October 20, 2007, 03:47:59 PM »

Let me see, if this will fix what I think the problem is first.  Then I will tell all, otherwise, I'm on a wild goose chance.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI
Dreamscape
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« Reply #7 on: October 20, 2007, 04:03:55 PM »

Hi Bill,

Is it the same leak that you had while you were here?

Good Luck,

Paul
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Kwajdiver
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« Reply #8 on: October 20, 2007, 04:14:04 PM »

Paul,

Yes, it is,,, took it to a shop in Panama City, Florida,  the mechanic was sure that it was feeding back through the switch.  I don't seem to have the same problems I thought I had driving from Phoenix to here.  Still hear the air in the front, like we heard.

Looks like I will sell the bus Monday.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI
Dreamscape
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« Reply #9 on: October 20, 2007, 05:33:21 PM »

Bill,

Good Luck on the potential sale.

Keep in touch, we don't want to lose a BusNut Friend!

Paul
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Kwajdiver
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« Reply #10 on: October 25, 2007, 06:00:04 AM »

Replaced the push-pull air value and it seems to have fixed the leaking air problem. 

Paul, I do not have the leak that we sprayed while at your place.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI
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