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Discussion Forum
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Diesel engine just quit, no very little about diesels!

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dave

01-07-2003 07:25:34




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Its about 25 degrees out, and we are having a terrible winter this year in NY, snow is everywhere. I have a 79 AC 816 backhoe, just started it up and ran it about 5 minutes moving snow and the engine just shut off dead. Cranks over fine but not attempting to fire. Fuel lever looks ok, and stuck a stick in the tank and the fuel looks ok but I wouldnt know what it looked like if it had gelled. It was liquid anyway :) Any ideas what I can do? The machine has a hood so the engine wasnt covered with snow. Should I crack loose a fitting going to an injector and look for fuel while cranking? I have never bled a fuel system on a diesel before so I am leery to take stuff apart. Any suggestions?

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D13

01-08-2003 06:32:32




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 Re: diesel engine just quit, no very little about diesels! in reply to dave, 01-07-2003 07:25:34  
Does it have an oil bath air cleaner? If so, water may be in the oil. When the engine is running this can be drawn up into the mesh and freeze blocking off the air. Starting fluid will not eliminate this condition. To check remove the hose between the air cleaner and manifold and see if it will run. To solve, pull the oil cup off the air cleaner, heat the cleaner above freezing to get the ice to thaw and run out, and then clean the cup and put in new oil.

My Allis B would do the same thing.

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JMS/MN

01-07-2003 08:15:56




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 Re: diesel engine just quit, no very little about diesels! in reply to dave, 01-07-2003 07:25:34  
What kind of fuel do you have- 1, 2, or a blend? Seems like it should be warm enough that gelling would not be a problem, but who knows? Gelling would not be evident in the tank- it gells in smaller spaces- fuel lines and filter. Looks like a jar of almost liquid vaseline when a glass filter gells up. First thing I'd do is check the filter, likely replace it. Gelled filters can be warmed to liquefy the fuel, but it's probably time for a new one anyway. Crack (don't remove) the lines at the injectors and crank the engine to see if fuel is coming through, and what condition it is in. At that temp, gelling is unlikely, so it could be a breakdown in the pump drive, etc. if you're not getting fuel.

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Dave

01-07-2003 10:59:10




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 Re: Re: diesel engine just quit, no very little about diesels! in reply to JMS/MN, 01-07-2003 08:15:56  
fuel was what came in the machine, plus I have run about 20 gallons through it in the summer, not sure how large the tank is so I dont know what is in there now. I opened the petcock at the bottom of the primary filter sight glass and got fuel dripping out. Cracked loose a couple injector lines where they go into the injectors and I show fuel getting there. Could there be something wrong with the fuel? I shot some starting fluid in the intake while cranking and the engine acted like it wanted to start, but only till the starting fluid was gone; it didnt act like it really was going to start. The gas station that I get my fuel says it is treated, and the engine did start and run fine for 5 or so minutes before it just shut off. I am stumped.

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rod

01-07-2003 15:24:11




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 Re: Re: Re: diesel engine just quit, no very little about diesels! in reply to Dave, 01-07-2003 10:59:10  
check the air filter for clogging or water in system also does the pump have a lever to shut it off could it be unhooked?
regards
rod



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Jim

01-07-2003 17:38:35




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 Re: Re: Re: Re: diesel engine just quit, no very little about diesels! in reply to rod, 01-07-2003 15:24:11  
this sounds like your fuel may whats called waxed, waxed fuel wiil has a whitish color to it. If fuel has waxed you need to drain tank, change filters and pump clean fuel through intire system



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