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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #1  
Old 07-18-2011
Randy Dupree's Avatar
Randy Dupree Randy Dupree is online now
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Default Emergency engine shut down,or,what to do if your engine will not shut off.

We had a member with a re-powered FC that has a 8.3 cummins in it,the other day it would not shut off and he didnt know what to do.
So,we need to have a talk about how to safely (non -destructive) shut down an engine.
First we need pics of different engines and the injector pumps.
Note: any D-Deck detroits will not be included in this thread,just mechanical engines.
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2000 LXI 43
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  #2  
Old 07-18-2011
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Default 8.3 Cummins Engine Shutoff Solenoid

Quote:
Originally Posted by iamflagman View Post
Here is a picture of the Cummins fuel shutoff solenoid from a previous post;



Check out http://youtu.be/b8949Rbl_zY

Quote:
Originally Posted by rwoody View Post
on the left side of the engine is a shut off lever that is hooked to a round cyl--the wires on it is what makes it shut off the fuel--in front of that is the throttle linkage.

easy to pull it back and kill it==i ran cables for a while on my converted pickups they work every time

Quote:
Originally Posted by Randy Dupree View Post
there is a fuel shut off,they are famous for failing,you can do it by hand,its on the injector pump,see he solenoid,follow the linkage and pull/push it to shut it down.
Quote:
Originally Posted by bwinter1946 View Post
Should look something like this:




Quote:
Originally Posted by Driver View Post
Just went through this last month. Bracket came loose and wouldn't allow the cutoff solenoid to engage. Of course Mom was 300 miles away when it happened - **** you Murphy! I had to try to come up with a fix and email her (and my Cousin) these pics/directions so they could get it to shut down. After several hours of running finally got it to turn off. Here's some pics and links to help and to picture what it looks like on the engine:

http://dodgeram.org/tech/dsl/troubleshooting/12v_fuel_solenoid.html

http://fostertruck.com/dodge/


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JOHN FINN
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1982 FC35RB
I'm NO EXPERT, but I did stay in the FINN'S INN EXPRESS last night
HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
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  #3  
Old 07-18-2011
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Default CATERPILLAR 3208

In the event that the fuel shutoff solenoid fails and sticks in the ON position and cannot be shut off with the ignition switch or the AT switch (mine doesn't work) I installed a Emergency Manual Fuel Shutoff Valve in the fuel feed line to the injector pump, it is easily accessible by opening the smaller portion of the doghouse cover.



Quote:
Originally Posted by Rick View Post
If I were to experience a no shut down, I would first hit the AT switch (Anti-Theft), next hit the master 12 volt switch before opening the engine compartment. If that didn't stop it I would open the top of the Racor. Notice no tools are needed to accomplish these steps.

Quote:
Originally Posted by Bill Pape View Post
These are pictures of the fuel shut off solenoid on the 3208's.
These link pictures are plagiarized from John Finns's personal website.




The Fuel Shutoff SOLENOID is mis-labled in the following picture and calle a Relay.





Assuming this is an idle "no shut down situation", and not a run away diesel or panic situation.
If the engine will not shut down from the ignition switch.
First disconnect the 12 volt wires on the solenoid, if it still will not shut down remove the solenoid two bolts.
No fuel should leak out from the injection pump.
More comments or criticism needed this could be a real situation.
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JOHN FINN
FORUM MODERATOR-ADMINISTRATOR
1982 FC35RB
I'm NO EXPERT, but I did stay in the FINN'S INN EXPRESS last night
HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
Visit the WILD HARE RACING website
REMEMBER 9/11
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  #4  
Old 07-18-2011
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Ex18C Ex18C is offline
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In my '85 PT-40 I had an incident when the bus wouldn't shut off. I pulled the emergency shut off cable in the steering column......and kept pulling......until about 4 ft of the cable was laying in my lap! The bus was still running. I then reached under the dash and turn off the master electrical switch. The bus shut down immediately.

Is this a bad/improper way to do it?
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  #5  
Old 07-18-2011
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Sounds good to me - wouldn't have thought of it. Must be a solenoid in the fuel line somewhere?
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  #6  
Old 07-19-2011
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Default

We need more from you Detroit owners.
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JOHN FINN
FORUM MODERATOR-ADMINISTRATOR
1982 FC35RB
I'm NO EXPERT, but I did stay in the FINN'S INN EXPRESS last night
HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
Visit the WILD HARE RACING website
REMEMBER 9/11
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  #7  
Old 07-19-2011
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Ernest Ekberg Ernest Ekberg is offline
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The early detroits have a small valve on top of engine. There is a plunger that pushes a lever when ignition key is turned off. If that doesn't work, you can just push that lever and that will kill the engine.
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  #8  
Old 07-19-2011
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iamflagman iamflagman is offline
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We also need pictures of the specific items described and I will add all of the Detroit replies and pictures into one post similar to the Caterpillar and Cummins posts in this thread, when we get more information.
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JOHN FINN
FORUM MODERATOR-ADMINISTRATOR
1982 FC35RB
I'm NO EXPERT, but I did stay in the FINN'S INN EXPRESS last night
HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
Visit the WILD HARE RACING website
REMEMBER 9/11
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  #9  
Old 07-23-2011
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Just got back from a trip to Fenwick Island, DE. Crossing the route 1 bridge into Middletown, DE I lost power steering. It was very difficult to keep the 82 FC35 on the road. We made it to the next exit and pulled into a WAWA. Discovered one of the V-belts broke and wiped out all the rest of them. No power steering, alternator, compressor, or water pump. Local wrecker service came with the new belts after giving him a list and helped me change them. I had the bumper off, grill off, and radiator swung out when he got there. He spent 3 hours helping me and the total charge was only $165.00.(MOTS Towing and Repair, Townsend, DE 302-264-7507 Ed.) Anyway, when I went to start the engine it would turn over but wouldn't start. Ended up tapping on the fuel solenoid and it started right up. This happened a couple more times during our trip and I found by turning the ignition on and off several times it would start. I should have payed attention some time ago when the engine would take several seconds to shut down when I turned off the key. Buying a new solenoid before our next trip. Thanks for the info on this thread.
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  #10  
Old 06-10-2012
oldmansax oldmansax is offline
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Talking

I replaced one hole in an 8v71 in the rest area between Gainesville, GA & Atlanta. I also helped Marine-Tex close a hole in the block of a 12V71, turning it into a 10V71.

That said, rebuilding a Detroit, and rebuilding a Detroit RIGHT are two different things.

I would not tackle it unless I knew what I was doing OR had someone to help who knows how; not to mention a shop, tools, jacks, etc.

NOT this shop! Except for the old guy, maybe.....

http://www.youtube.com/watch?v=8M1o2...eature=related

(I know I'm supposed the embed the video but I don't have time to look up the instructions right now!)

TOM
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