Case 580b not sending fuel to injectors

Grt_580b · Feb 21, 2021

I have a case 580b that has always ran great but it died while ideling the other day and won't start even try to start again. I thought it had run out of fuel so I put 5 gal in it and opened the bleeder on the filter until I had fuel there, then cracked the line that supply's the pump and had fuel there as well. I cracked the injector lines at the pump and cranked it but no fuel there, so I opened the return line and removed the elbow and cranked some more, no fuel moving through the pump... It's a roosa master dbg 431 fcc46aj, any ideas

wore out · Feb 21, 2021

(quoted from post at 18:00:57 02/21/21) I have a case 580b that has always ran great but it died while ideling the other day and won't start even try to start again. I thought it had run out of fuel so I put 5 gal in it and opened the bleeder on the filter until I had fuel there, then cracked the line that supply's the pump and had fuel there as well. I cracked the injector lines at the pump and cranked it but no fuel there, so I opened the return line and removed the elbow and cranked some more, no fuel moving through the pump... It's a roosa master dbg 431 fcc46aj, any ideas

First of all, is this an electric shutoff pump? If so, can you hear the fuel solenoid "click" when the key switch is turned "ON"?

If NOT determine why there is no power at the fuel solenoid, or that it has stuck or otherwise failed.

If things check out there, remove the little timing window held on with two flathead screws and note whether the internal parts of the pump are rotating when the engine is cranked.

(Sometimes the "head and rotor" in the pump will seize, and the pump driveshaft is designed to break when this happens.)

Be aware fuel will leak when the timing window is opened. up.

Dieseltech · Feb 21, 2021

Check the pump for head seizure like wore out said, with the timing cover off the timing plate MUST be turning when engine is cranked. No plate turning means head seized
and drive shaft broken. Dirt, water, or ice can cause head seizure. Also if head bolts for injection lines can seize the head if just ONE of the line washers is missing..

Grt_580b · Feb 22, 2021

No electric shutoff it's an early 60's machine and all mechanical. No solenoid on the machine it's all gravity fed to the pump and to restate, there is fuel flowing to the pump.

I can also confirm that the pump is turning freely and not seized or otherwise broken.

a1cnc · Mar 5, 2021

Just to be sure, does the shutoff move freely at the back of the pump?

Might be worth pulling the top cover off the pump to see how nasty it is in there.

Once the cover is off,You will be able to see if the metering valve is stuck. Where it died at idle, I suspect it's time for a pump rebuild

a1cnc · Mar 5, 2021

Also, They can be a real bear to get to prime without a FULL tank of fuel once they run out or you change the filters

Case 580b not sending fuel to injectors

Grt_580b

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wore out

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Dieseltech

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Grt_580b

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a1cnc

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