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

[luvrbus]

LOL I am missing something all I see is the governor with the cap to remove for setting high speed and the throttle that is connected with 2 pins and a rod to the fuel tube,the shut down should be on the rear of the head   

[chessie4905]

   Put it in gear and dump the clutch to stop it. An electric fuel pump will make priming easy.

[gumpy]

Something curious you said. Where was the air hissing from?  And why?  Usually, hissing air is a bad thing.

Maybe the air line that activates the shutdown has a hole in it.

[mung]

Funny, because my wife asked if I could put it in gear and stall it out.  Problem is, that I have it blocked up and a jack in on the front wheels because I have been working on the air brakes and the power steering.  I thought the risk of doing that might be a little higher than starving it for fuel.  So, just any 12v fuel pump should work for priming when I am ready?  I am guessing that putting it inline directly after the tank should be the best right?  Then a hose that threads into the priming hole at the top of the secondary filter and runs back into the tank.  Once it fills everything up, It should be good.  Something that would be good to just leave in place all of the time I would think.

[mung]

Don't know why the second picture didn't post, but I will try again. 

[mung]

And hopefully the right way up now.  On the right you can see the bolt I replaced and yes, I know the back bracket is already rusting, I need to buy some green paint!

[luvrbus]

A good inline pump but before the primary not the secondary filter,one time use I use a 134 quick disconnect ( when I can find it) screwed in the primary pump 2 gals fire it  

[mung]

I would think a good inline pump would be fine not being powered unless I was priming.  I have about 50 old AC control switches that could be used as the priming switch.  Would be a very good thing to have one would think. 

[luvrbus]

Lol whew I thought I had lost it for awhile I'll buy that setup 

[mung]

Grumpy, it was only for a second and might not have even been the shutoff valve.  But, it was shutting off just fine before I started all of this.  

That being said, is there a way to make the shutoff NOT be air dependant?  I would be more than happy to run the wires directly to a solenoid that could actuate the shut off push rod.  Tell me the part number and I will order it.  Seems rather silly that you have to build air to shut the motor down.

[luvrbus]

They sell electric shutdowns for those engines how many times have you saw a generator with a air shut down ::)only buses us that silly type shut down only because it is part of the safety shut down for low oil pressure or over heating so roll the dice I guess

[eagle19952]

like i said...if you replaced the 90 fitting that the air goes into...with a three way run tee you could pull the run through capped and manually actuate the rack rod to push the rack to no fuel without defeating the shutdown air engine safety system.. beats waiting for it to run out of fuel.
especially since you are re-engineering other things you may not be confident doing...

heck you could put a shrader valve  there and shut it down with a bicycle pump...which would be better than what you had...

[chessie4905]

   Another thing that is good to have is a place to hook an outside air source to to pre-fill air system. Our 04 had a tap tee'd into drain line at bottom of tank under driver's area in compartment. Came in handy many times. Saves idling time to bring air up. Also source for an air tool for tire changes or whatever.

[mung]

I have a tap in the same location and a fitting that will allow me to plug my air hose from my compressor into it. 

While these are all great ideas for an air issue and I am going to put the T in, if the failure mode is what I believe it to be, it wouldn't have done any good in this situation.  I am 99% sure that the air was getting to the plunger, but the rod going to the fuel rail is not in the right place and if that is the case I don't see any other way of shutting her down at the rail.

So am I right that the 4 big handles at the top are how you get the top over off?  I don't see any bolts around the edge like on a conventional valve cover.  Am I going to need a new gasket if I pull the cover off?

[luvrbus]

No bolts around the side and you will need a new gasket,I don't know how far he lives from you but I would take Dave here on he board up on his offer for the free cast aluminum cover for the 6-71 the old stamped covers are hard to keep from leaking fwiw  

With the cover off tell us if you have 2 valves per cylinder or the 4 valve head the 2 was original