Jd 410 backhoe fuel problem

Phil Tibbetts · Nov 4, 2010

I have a 1976 JD 410 backhoe loader with the 219 CI diesel engine. It starts up fine first thing in the morning but after running for 1/2 to 1 hour it just dies like it ran out of fuel. If I let it cool down for a couple hours it will start and run for 5 or 10 minutes then die again. I have installed a new fuel pump and new filters and I am getting plenty of fuel to the injector pump. I am guessing the problem is with the injector pump itself but before I remove it and have it rebuilt I am wondering if anyone has another idea of what the problem might be?

Phil Tibbetts · Nov 4, 2010

I forgot to add this has the Roosa-Master injector pump.

Anonymous-0 · Nov 5, 2010

You could try to loosen the two timing window screws, (the plate is rectangle shaped) make sure the gasket is not sealed tight, allow some fuel to leak and see if she runs when this happens, just as a test. Internal pump pressure from a clogged return check valve can and will do this, the check valve is sometimes in an elbow fitting coming out of the injector pump, take it to the vice, get a paper napkin and a dental pick, inspect it, it may have a glass ball and a spring inside, then give it a shot of compressed air catching any "crud" in the napkin. Remember this trick and pass along the info if it works for you. oh and uh, Hoe Hoe Hoe!!!

tim s · Nov 5, 2010

It sounds like the return check valve is pluged, it is located where the return line leaves the pump, the one that goes acrost all the injectors and on to the top of the fuel tank. Remove the line then the fitting out of the pump, it will be pluged with little black chips,these chips are from a coupleing in the drive that is deteriating, file the end of the fitting enough to get the washer and ball and spring to come out, discard these items and reinstall the fitting and line, it should start and run now, it may idle a bit rough but it won't hurt anything,,start prpareing for a pump O/H in a few months to a year.

Scott_S · Nov 5, 2010

Had the same problems with my 410 - twice.
The first time it was the screen in the tank. Watch the fuel filter when this happens. If it starts foaming inside it may point you to a restriction in the tank. The valve in the bottom of the tank has a fairly stiff screen sock sticking out of the top of it. For a quick fix, take a long stick or rod and feel down through the filler neck and carefully scrape the crud off the screen. That will get you by for a while until you can drain/clean/rinse the tank out.
The next time the problem was a restriction in a tee in the injector leak-off lines. You can loosen some of the connections and see if it runs better.
Scott

tim s · Nov 5, 2010

Yes this "grit" can clog in different places, and cause a lot of grief,but normaly the first place is the check valve,,then it can move on to an elbow, the check valve removal thing will get you going but it will still need atention soon.

JDemaris · Nov 5, 2010

If fuel is, for sure, getting to the pump when it dies, the problem is the plastic weight-retainer ring has falling apart inside the injection pump.
Symptoms will be normal starting, then losing power, then quitting. Then starting fine again.

On average, takes $50 in parts to fix back to original, $100 to fix and update so it can never happen again, and labor - who the heck knows? For someone with experience, once on the bench, it take one hour to fix the pump. Many shops are going to charge you $400 - $800 for the same repair.

If you don't know anybody who knows how to do it, I suggest you try to find a shop that will fix "as needed" and not charge you a high flat-rate. Many small shops used to fix "as needed", but they are getting scarce. We used to fix them on-site, when I worked for a Deere dealer. Probably none do that anymore.

JDemaris · Nov 5, 2010

My 300 Deere backhoe quit this summer, only a few hundred feet from my shop. I knew the housing-pressure-regulator-valve had plugged from a broken plastic ring inside the injection pump. I reamed it out, moved half-way to my shop and it died again. Big chunks of plastic made it to the return-fuel boots on the injectors. So, I just unhooked the return line at the injection pump and drove up to my shop with fuel spilling all over the place. A carried a fire extinquisher with me, just in case. If the environmental police had seen me, I'd probably be in big trouble for my "massive" diesel-oil spill.

Got the whole thing fixed in less then one day, but I had all the new parts on-hand. I upgraded the weight-retainer and no longer have any plastic in there.

Jd 410 backhoe fuel problem

Phil Tibbetts

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Phil Tibbetts

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Anonymous-0

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tim s

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Scott_S

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tim s

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JDemaris

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JDemaris

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