GregsHD
Senior Member
Okay, I got confused after I reread the first post. You mentioned air throttle, and electric shut down solenoid.
Yes they did, I have had a stuck injector in a 12V71 with spring loaded rack levers and it was still tough to get it shut down. Of course the stuck injector was at full fuel and part of a complete "white box" set. This was 300 feet out the shop door after an inframe.As a side note on this problem I have a question. Did Detroit do away with the emergency shut down flapper when they went to the spring loaded levers on the tube with the single screw adjusters for the rack? 99.9% of the Detroits I worked on over the years had the two screw adjusted rack levers and I just don't recall how the one or two I may have worked on with the spring loaded levers like this truck has.
So I guess if one injector is able to keep a 12V-71 running against the spring loaded lever I can imagine that it could even be worse for a litte 6-71!Yes they did, I have had a stuck injector in a 12V71 with spring loaded rack levers and it was still tough to get it shut down. Of course the stuck injector was at full fuel and part of a complete "white box" set. This was 300 feet out the shop door after an inframe.
So I guess if one injector is able to keep a 12V-71 running against the spring loaded lever I can imagine that it could even be worse for a litte 6-71!
Maybe not going to the ballistic state like the rigid levers but enough to cause one to not want to stay put and do what needs to be done.
Seems like I recall hearing someone say the best way to stop a run-away was to point a CO2 fire extinguisher at the air filter. Not sure if that would be a good idea if running without any air intake filter.
You shouldn't be able to overfill the engine to the capacity that it overfills in the airbox providing your drains on the side are clear. (snip).
I heard a story about a guy that threw the service manual over the blower on an 8V-71 and it ate the book a page at a time and blew confetti out the stacks.My brother rebuilt an 8v71, and when he started it, it ran away. He had put a piece of 1/4 plate by the front tire, but somebody took it without him noticing. He ran around the shop hunting something, and grabbed a piece of 1/4" plywood. He put that over the intake and she sucked a perfect round hole in it and kept on screaming til she grenaded!
Oh boy!!!Headed there this morning to look at this ill post back what we find.
I'll second everything Vetech63 said!
I'd have to do some digging but seems there is a chart that will give oil pan capacities for various oil pans, or maybe I'm thinking about an 855 Cummins manual????
I do like the idea of pulling the pin on the fuel tube and seeing how it works with the governor out of the picture. To make it clear see picture below. The yellow arrow is pointing to the pin Vetech63 is taking about. One thing if pulling that pin I would suggest putting some paper towel under that area as the oil drain back hole is right near there!
View attachment 198215
One more suggestion is when removing the cotter pin take out the one that is to the right in the picture and reinstall it from the left side as you look at the pin in picture.
Really doesn't matter BUT! if you get interrupted and forget to put the new cotter pin in there is a good chance the pin will stay in place as the valve cover will tend to prevent it from falling out. You really don't want to have that pin come out while engine is running. You could end up with all six injectors going to full fuel and the shut down solenoid will have no way to stop it!
One more suggestion. If at anytime the engine does try to run away again and you decide there is nothing you can do and you want to make a run for it, run in a line parallel with the crankshaft. If parts are going to fly out they will most likely come out the side of the engine!