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Minneapolis Moline Tractors Discussion Forum
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mmG705 can't get fuel to the injectors

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Mark McCracken

10-21-2003 12:33:48




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I have lost the fuel away from the injection pump. I have tried to bleed it But i can't get it primed. any ideas?




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Here's a thought...

10-21-2003 13:26:20




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 Re: mmG705 can't get fuel to the injectors in reply to Mark McCracken, 10-21-2003 12:33:48  
I'm guessing you already checked and you have fuel at the injector pump inlet. I wouldn't be surprised if someplace on the injector pump there isn't a plug that can be removed to aid in priming it. If not, try cracking the lines where they attach to the injectors and try cranking and see if that doesn't help. I myslef don't own any Moline diesels, but I have a few service manuals that I can look in.

Probably not the best suggestion, but one that should work is to ether it. Spray some ether in and crank the engine. Once it fires and begins to run, continue feeding it ether until it will run on it's own prime.

There are drawbacks, if you have glow plugs, DO NOT heat them up.. you'll get an expensive BANG! Excessive amounts of starting fluid can also potentially wash the lubricants from the cyclinder walls or cause hot spots that could burn holes in piston tops. However, we've used this procedure on Detroit Diesel power units that have been run out of fuel without experiencing any problems on numerous occassions.

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EIL

10-21-2003 14:08:29




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 Re: Re: mmG705 can't get fuel to the injectors in reply to Here's a thought..., 10-21-2003 13:26:20  
I am by far no expert however I do know that if you use ether you are running the risk of breaking the top compression ring, then the engine will never develope enough compression to start the engine. This problem is known as an engine being spoiled to ether. In other words, once the damage is done, it's done, and you either spend several hundred dollars fixing the problem or continue using ether and run the risk of further damage. I much prefer using gasoline in a spray bottle or soaking a rag in gas and holding it over the intake. Also, make sure to not spray any starting aggent into the air cleaner, especially an oil bath since it would thin the oil. Also, as stated, DON'T USE GASOLINE OR ETHER WITH GLOW PLUGS!!!!! !

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John McLucas

10-22-2003 13:53:43




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 Re: Re: Re: mmG705 can't get fuel to the injectors in reply to EIL, 10-21-2003 14:08:29  
Every warning above is correct. Be careful cranking on ether sprayed in the air intake. First I would check to make sure fuel is getting to the injector pump. Then loosen the lines one at a time where they go into the injector. After loosening one, crank the engine until fuel leaks then tighten. After you know fuel is getting to all the injectors, and if it still doesn't start you can use one of the modern ethers. Buy John Deere brand or some other modern ether that is not 100 percent ether like your daddy used. The modern ethers have lubricants that help avoid the problems mentioned above. If you have glow plugs, do not use ether. You may have to put booster cables on your battery because sometimes it takes a lot of cranking to bleed the lines and you need a good strong turn. About 30 seconds is enough on the starter at a time. Give the starter a cooling rest then try again.
Good luck,
John

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