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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Detroit Diesel Help

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Chad

07-03-2004 18:30:32




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Hey, I know this isn't an oliver but I have a really old HY-Dynamic Dynahoe that has a GM Detroit Diesel 3 cylinder, 2-cycle engine. I believe that this is the same one that some of the Olivers have. It just up and quit on me. I finally got it to restart after a shot of starting fluid but it was really sluggish and starved for power. So I changed the fuel filter and now I think I have air in my fuel lines. Need help, am new to diesels!!

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wayne

07-04-2004 20:40:48




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 Re: Detroit Diesel Help in reply to Chad, 07-03-2004 18:30:32  
1. Install pressure guage on secondary fuel filter housing start engine run @full throttle pressure should be 50-70 psi, if pressure is below that check for suction loss cracked fuel lines, foreign material in tank cracked fuel filter housing improper sealing of gaskets on fuel filter housing. If fuel pressure is higher check for blocked return line, if rubber hoses are used they will deteriote internally causing a problem. Also have seen injectors filters plugged causing a problem. Also easy way to check remove return line check for bubbles indicating suction loss. When running engine with line off run for 1 minute in can should have almost 1 gal in 1 minute. Check emergency shut off first

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MikeO

07-03-2004 22:07:08




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 Re: Detroit Diesel Help in reply to Chad, 07-03-2004 18:30:32  
First of all, check the emergency shut off as Karl indicated. Next I would check to see if the blower turns. I had two blower shafts go out on my 4-53. By the way the emergency shut off is located by the blower and kills the air supply.



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Karl

07-03-2004 19:06:21




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 Re: Detroit Diesel Help in reply to Chad, 07-03-2004 18:30:32  
Chad, it sounds like you may have an emergency shut-off switch that needs to be re-set.The engine will start and barely run with it tripped but you won't get any power or rpm.



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oliver is it

07-04-2004 02:04:54




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 Re: Re: Detroit Diesel Help in reply to Karl, 07-03-2004 19:06:21  
well i have learned somthing didnt know a 371 had emergency shut offi knew 453 s do . know i will have to go look mime over to try and find it



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Carl Sacon

07-04-2004 07:11:14




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 Re: Re: Re: Detroit Diesel Help in reply to oliver is it, 07-04-2004 02:04:54  
All diesels need a clear air supply, and fuel (without air bubbles)to run. The air flapper is for emergency shutdown. If it is tripped, the air is shut off, so just re-set it. If the fuel lines or filters have air in them, then no fuel reaches the injectors. So the air trapped in the fuel lines has to be replaced by fuel. Fill the filter cans with fuel before tightening them, and crack a fuel line fitting, then crank with the starter to pump out the air until there is a steady supply of fuel, and then re-tighten the fitting.

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