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 51 
 on: July 21, 2014, 09:21:13 PM 
Started by krank - Last post by krank
I have noticed that my alternator does not start to charge until air pressure has built up to 70 (or so). From what I can see, it appears that the alternator is direct drive. Why would it need air pressure to "engage" the alternator. BTW, I have not had the bus on the road yet, just in the build process, so the only movements for the bus is shunting it around at the shop into an open/available bay to work on it.
I plan on installing a one lunger compressor (110v) off a 10 gallon tank unit and connecting it to the wet tank solely for the purpose of have air available to move the bus right away to a more friendly/less sensitive spot for warm up when in a campground.

 52 
 on: July 21, 2014, 09:10:40 PM 
Started by Mex-Busnut - Last post by twostick
Off topic a touch but this is an interesting spin on a skoolie.

Kevin

 53 
 on: July 21, 2014, 09:01:41 PM 
Started by BlueScarecrow - Last post by twostick
Hi Clifford... Thanks for writing.

I'm only theorizing, but it makes perfect sense.

Oil is seeping in through the blower seals (or from somewhere) into the blower and when the piston retracts and reveals the intake port the blower blows in fresh air along with some oil and it is combusted along with the fuel. This is the reason for the blue smoke. The reason that it does not run away, is probably that the amount is too small to support combustion.

When I gunned it the other day and it ran away for a few seconds, the amount probably reached the window of combustion and it took off! Since it was only a minute amount, the run-away lasted only a few seconds.

Then too, when the piston retracts and reveals the intake port, the blower blows in fresh air along with some oil in through the intake and right out the exhaust port. The oil lands on the superheated exhaust manifold... turns into white smoke... which travels out through the tailpipe. Remember it takes only a minute amount of oil to give a billowing white cloud.

When I did Special Effects in LA, we built a small cracker out of a 25 gallon drum. We filled the bottom with Johnson & Johnson Baby Oil just to cover the air manifold and we could make smoke all day without refilling the drum.

You are right about the zip. I use my brothers address as a base. He lives on 85th and Chaparral. I've been bouncing it around from location to location until I find a nice spot where it's not a bother to anyone and I have electricity to work on it. I have it parked at my apartment building right now. The owner is cool. Thought the Rolling Stones were in town.  Wink

What do you think of my theory?

Like to hear my theory on gravity?

Thanks again for writing!

If you like... send me an email and I'll send you my contact info.


Best regards,
Mike

N9EWS



I haven't read the entire thread but another reason a screamer will run away briefly is if it is dead idled for a prolonged period or driven at low speed, especially at low engine temps or if it has a few tired cylinders. What happens is the unburnt fuel that doesn't slobber out the exhaust collects in the air box and when enough of it collects, all it takes is for the engine to be revved up quick and it will inhale it, and away she goes.

I used to see it at trucking companies that would use an old beater with a 671 or 8v71 for a yard tractor and it would idle for days, never get out of second gear and the temp hovering about 130 deg.

The first guy that goosed it across the yard would get the ride of his life for a few seconds.

Kevin

 54 
 on: July 21, 2014, 08:52:03 PM 
Started by BlakeWright - Last post by Iceni John
Go back to Home Depot, buy back that compressor, then install it in your bus connected to the accessories air system, not the brake system!   It is for inflating tires and running air tools, and for absolutely no more than releasing brakes enough in an emergency to pull off the road to a safe place where a tow truck can safely hook up to you.

Even a little rinky-dink cheapo compressor can produce 120 PSI, but not at sufficient volume to safely supply brakes.   That's why a Tu-Flo 700 produces umpteen times more air volume than a cheapo electric compressor.

John

 55 
 on: July 21, 2014, 08:18:32 PM 
Started by Kwajdiver - Last post by luvrbus
They have changed names it is Divine Transportation I think the phone number is the same 602-340- 0018 last I heard they were still doing outside work

 56 
 on: July 21, 2014, 08:11:00 PM 
Started by Kwajdiver - Last post by eagle19952
does anyone have recent recommendations?...
Yes..start a new post...dredging up 10 year old posts is just pushing current events down the page. Angry

 57 
 on: July 21, 2014, 08:00:03 PM 
Started by Kwajdiver - Last post by Jeremy Watson
Hello,
I am on the hunt for a great shop in Phoenix to work on the 8v71 in my 1971 MCI MC-7. This thread is a little dated, does anyone have recent recommendations? Thank you!

 58 
 on: July 21, 2014, 07:28:26 PM 
Started by BlueScarecrow - Last post by Jeremy Watson
Hello,
I recently purchased a 1971 MCI MC-7 with a rebuilt 8v71. I have been on the hunt for a great (and honest) mechanic in Phoenix to inspect and service it for me. While searching I came across this thread and noticed a couple members speaking highly of Michelangleo of Phoenix. I tried calling the number that was listed today and that number (602-340-001) is no longer associated with that business.

Can anyone recommend someone here in Phoenix?

Thank you!

 59 
 on: July 21, 2014, 05:53:21 PM 
Started by BlakeWright - Last post by wg4t50
I am also in the camp about returning a perfectly fine compressor for a refund, sounds like a desperate bus wannabee. Embarrassed Sad
Seems most of us take the high road and glad I do.
Dave M

 60 
 on: July 21, 2014, 05:31:59 PM 
Started by BlakeWright - Last post by eagle19952
The drive hub had sheared the key and was spinning freely on the compressor crankshaft....

well that's going to cause more problems....

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