Scenic 8V71 not shutting off

[rampeyboy]

Guys a funny thing happened this afternoon. My sister n law was over and for once showing some interest in the bus, and for once not being negative! I was so proud to show her how easily it would start. Mind you it looks terrible to the uninformed. She was shocked it would run! Well run it did. I only ran it a minute at the most.  When I flipped the switch to shut it off, nothing! It kept right on running. Flipped the switch back and forth a couple times. Nothing. I left the switch in the off position. So without saying a word I cooly walked away with her, letting it run, talking as if nothing was wrong. No time to panic, things going well for a change! After a 20? seconds talking it finally shut off normally. I was really thankful it did, because my next step was to pitch a fit!
So, all this being said, what do I need to do when this happens again? I've read of skinner?? valves and things, but couldn't begin to tell ya what a skinner valve looks like. Only way I know to kill it short of springing the emergency shut off is to disconnect a line and let her run out of fuel. Time to get out my book on CD and start studying!

Boyce

[lostagain]

It takes a minimum of air pressure to activate the shut down cylinder. That is why it didn't shut off after only a few seconds running, and why it did shut down after a little longer once it had built up enough pressure. You could shut it down if you had to, by moving the shut down lever by hand on the governor. You should make yourself familiar with the procedure.

JC

[Rick 74 MC-8]

Nothing wrong it needed to build air pressure the skinner allows the air pressure to  work to shut off

                     Rick  74MC-8

[Mex-Busnut]

You have heard those old Scenicruisers will run for ever...

On mine, after I turn off the switch, I have to press a push-button swicth on the dash and slowly accelerate until it shuts off. Maybe mine doesn't have the Skinner valve...

[rampeyboy]

Now that makes sense. It surely didn't run long enough to have any air pressure. This was the first time I have started it, and immediately tried to shut it off. Thanks guys!

[artvonne]

  I also need to go on a learning curve concerning my Bus and engine, get some books, etc. But AFAIR, my MC5B will shut down right after startup with zero air pressure. I assume mine shuts the fuel off electrically? Would that not be a good upgrade to an older Bus such as an old Scenic?

 

[luvrbus]

Some buses have a electric shutdown Paul, I like the all in one shutdown electric and air, no skinner valve the skinner valve is what requires the air pressure to open the all in one will shutdown with 5 lbs of air 

good luck

[bevans6]

You can always shut it down by manually turning the no-fuel lever on top of the governor, on a mechanical engine.

Brian

[roadrunnertex]

Folk's the Scenicruisers were a very good bus and still is.And most folks that have a MCI,Prevost or a Eagle and other makes have to realise when the Scenicruiser came out in 1954 most of the above buses were not in production as of yet.
It's hard to realise that after over 50 some odd years the Scenicruisers are still in demand and they are quite an attention getter.
Also a Scenicruiser in running condition will bring more money than a lot of the above later model coaches.
GMC and Greyhound had a winner!

[luvrbus]

They sure didn't hang around long to be a winner lol,I have some records for those from GreyHound in Dallas the maintenance and upkeep was a little too expensive for GreyHound they are still a icon today anyway 

good luck

[artvonne]

  I dont think anyone was finding fault with scenics, just a few questioning if an upgrade to a different fuel control setup wouldnt help modernise it a bit. I always thought they were cool, but far to large for what I need. Heck, I didnt even want a 40 footer.

[luvrbus]

FWIW the 8v71 was developed for the Scenic they ran the 8v71 in the test stages,I saw a Greyhound photo at Stewart and Stevenson of a 8v71 that was taken in 1956 a year before the 8v71 came on the market I think Cole has the photo


good luck

[thomasinnv]

You can always shut it down by manually turning the no-fuel lever on top of the governor, on a mechanical engine.

Brian

though this is true I wouldn't advise this method when the air is built up, You may lose some skin. don't ask me how I know this. lol.

[RJ]

They sure didn't hang around long to be a winner.

Clifford -

I think Tom McNally would heartily disagree with your comment!

The first Scenics went into service in 1954, and the last of them were finally sold off in the fall of 1977.  That's 23 years of service, more than any other single coach model in the Blue Pooch's fleet before or since. 

Even the workhorse MC-9s didn't survive over 10 - 15 years in 'Hound service.  Any that you "see" today are actually MC-12s, and even they're virtually extinct now.

When you say "Greyhound Bus" to ANY baby boomer, the very first mental image that comes to mind is the Scenicruiser.  Just like when you say "Trailways", people think of the Eagle.  As a corporate image, next to the running dog, the Scenic IS Greyhound to a whole generation of folk. Even today, if a Scenic shows up at ANY transportation-related event, people will flock to see it.

After the miserable initial twin 4-71s were replaced with the 8V71, the coach earned it's keep, right till the very end.  And often went on to many more years of service in second and third tier operators.  Maybe the newer stuff was less expensive to operate, but the corporate PR value of the coach has never been matched - and THAT was priceless to Greyhound.  (At least till the hot dog salesman took over. . .    )

Boyce -

You learned something about your Scenic, didn't you!   

FWIW & HTH. . .

[rampeyboy]

lol, amazing how threads evolve huh?  All interesting though!