6-71 Shutoff not working and engine wouldn't stop.

mung · September 15, 2014, 05:48:20 AM

I missed Dave's post about a free valve cover, where is it?

luvrbus · September 15, 2014, 05:55:31 AM

The last time Wg4t50 (Dave) offered it was in the Jake Brake ordeal still on the front page

Rick 74 MC-8 · September 15, 2014, 06:00:10 AM

the Schrader valve is a great idea. But I believe thats a 3 Way solenoid so it would just vent unless you added air faster than it could vent.

mung · September 15, 2014, 06:37:54 AM

Does anyone know why the push rod has the open back end instead of being closed so it can't slip out? Also is there anything moving in that area of the engine that might have been damaged if the rod did fall below the control tube lever? I hope not!

eagle19952 · September 15, 2014, 07:31:44 AM

I don't think anything was damaged.
I believe it fell out while you were repairing the broken bolt.
I understand that if the rod was able you would not have had the problem.
But if you had no air or electric now or in the future what would you do ?
I believe that the electric air valve only exhausts under certain switched conditions, otherwise there would be a constant air leak.
The knobs are the valve cover hold downs.
At least get a gasket,leaky Detroit's don't rust

i am in Homosassa.

chessie4905 · September 15, 2014, 07:40:07 AM

Since the engine is almost vertical, you can reuse the gasket if it is relatively new rubber and doesn't tear coming off. Have someone turn the switch on and off (don't actually start it) to see if the plunger is moving the rack into no fuel. (with air in system) Check this before you fix any thing to see if that is your problem. You should also hear a hiss/click when the switch is thrown. All the parts in head should have a thin coating of semi-transparent black oil.

mung · September 15, 2014, 07:44:42 AM

I could hear the hiss when I was turning the switch on. It was working fine before all of this so that is why I think it slipped off.

I will see if anyone local has a gasket and if not order it.

I will pull the cover tonight to see if we are right. And yes I will air it up and see if the switch activates the rail correctly before putting the cover back on.

eagle19952 · September 15, 2014, 08:06:28 AM

....where in central Florida are you ?

mung · September 15, 2014, 08:28:55 AM

I am in Palm Bay.

bevans6 · September 15, 2014, 11:31:55 AM

The valve cover gaskets on my DD are rubber and are almost infinitely reusable. I have those things on and off all the time, it seems...

Brian

mung · September 15, 2014, 11:53:12 AM

I will have to see what it looks like when I pull it. Hopefully it doesn't need to be replaced.

mung · September 15, 2014, 02:48:21 PM

Got it fixed and what had happened was the fork was sitting sideways next to the pin for the fuel rail as can be seen if you look really carefully a the picture.

chessie4905 · September 15, 2014, 05:43:54 PM

Yessir, that'l do it every time. Thank the stars it didn't jam the rack open; that would have been nasty. After correcting it, have someone operate the dash switch to observe it's operation. BTW, what is the number and letters on the injector disc? You may have to wipe it off with a rag to read it.

mung · September 15, 2014, 05:46:56 PM

I aired it up and checked the movement, it is working now. I didn't take the cover off far enough to read anything.

mung · September 22, 2014, 05:12:44 AM

Finally had a chance to prime her back up and get her running this weekend. She is turning off fine now.