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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: Cat 3204 running rough

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Stick welding

03-29-2013 21:14:36
96.53.210.246



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I've ran it out of fuel before and it wasn't too involved to prime. The fuel lines all look the same size. The fuel pump is on the bottom of the injection pump. I'll take the longer hex piece off and clean the screen. It's the lower fitting. Some of the fuel lines are hard to follow because they go behind the filter. When I emptied the old filter, the fuel was green colored, then black colored when almost empty. The green color might have been from the fuel conditioner and the black maybe from dirt that had been filtered? It has an 8D battery but it's getting old. I can boost it though for faster cranking.

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RodInNS

03-30-2013 05:59:20
216.118.158.123



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 Re: Cat 3204 running rough in reply to Stick welding, 03-29-2013 21:14:36  
What vintage is this machine? It may have a different pump than the sleeve metered job on mine... but I've never found it easy to bleed when it's actually out of fuel. If you catch it and stop when it gets the staggers, you can clean the screen and it will restart without bleeding, but if it full out quits... it will take a while.

I'd say the black slime, etc is the result of water and probably algae in the tank. Dunno about the green.... unless it's dye in the fuel. Around here some suppliers like Ultramar dye their road fuel green.... and I mean GREEN like St. Patty's day beer.

Rod

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Stick welding

03-30-2013 11:04:56
96.53.210.246



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 Re: Cat 3204 running rough in reply to RodInNS, 03-30-2013 05:59:20  
It's a Japan built 1986 with the improved 3204 DI. I think the fuel conditioner was a green color and the black maybe from dirt the filter picked up? Before when it quit loosening the injector lines on the pump was enough to get it going again. The fact I had it running when I last parked it and it started right up yesterday after sitting for a couple weeks would indicate something may be blocking fuel flow. I think if it had a leak somewhere it wouldn't have started so easily after sitting. I'll clean the screens at the lift pump and the fuel shut off and see if that's the problem.

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dpendzic

03-30-2013 06:09:00
71.127.7.202



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 Re: Cat 3204 running rough in reply to RodInNS, 03-30-2013 05:59:20  
I have always bled my filter by the method in my maintenance manual--the top of the filter housing has a bleeder screw on the left side . I open that and let gravity feed until no air bubbles. Never had to crack an injector.



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RodInNS

03-30-2013 17:20:48
216.118.158.123



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 Re: Cat 3204 running rough in reply to dpendzic, 03-30-2013 06:09:00  
Mine doesn't have a filter bleeder that I can recall. It wouldn't much matter if it did or not. Even bleeding the top of the pump manifold is insufficient when it really air locks... Mine is an 87 D4H with the Mitsu/3204T

Rod



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dpendzic

03-30-2013 17:49:28
24.184.14.235



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 Re: Cat 3204 running rough in reply to RodInNS, 03-30-2013 17:20:48  
yep--lots of different arrangements--mine is a 1987 D3b, Mitsubishi, engine serial 45v51332, arrangement 2w7487.
no primer pump, filter bled, constant fuel delivery problems since i bought it in 2008
can"t find any way to get to a possible screen in the fuel tank



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