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Case Tractors Discussion Forum

Case 580b not sending fuel to injectors

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Author  [Modern View]

02-21-2021 17:00:57

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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

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02-22-2021 09:44:11

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 Re: Case 580b not sending fuel to injectors in reply to Grt_580b, 02-21-2021 17:00:57  
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.

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02-21-2021 17:53:01

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 Re: Case 580b not sending fuel to injectors in reply to Grt_580b, 02-21-2021 17:00:57  
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..

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wore out

02-21-2021 17:10:44

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 Re: Case 580b not sending fuel to injectors in reply to Grt_580b, 02-21-2021 17:00:57  
Quoting Removed, click Modern View to see

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.

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