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Restoration & Repair Tips Board

JD4020 wont run

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Scott Rebault

04-09-2006 14:28:29




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I have a '70 4020 deisel and it will start and run for a couple of seconds, but will not stay running. I have drained the fuel tank and replaced with fresh fuel, replaced the fuel filter, and primed thru the injector pump. Also have installed new air filter. It has a Roosa Master injector pump. Any ideas, I'm fresh out...




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msb

04-09-2006 19:55:15




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 Re: JD4020 wont run in reply to Scott Rebault, 04-09-2006 14:28:29  
Is it a CB model pump or a DB model? Need to know before we can help you.



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Scott Tebault

04-10-2006 06:23:00




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 Re: JD4020 wont run in reply to msb, 04-09-2006 19:55:15  
I do not know. The pump is apparently driven much like a distributor and sits verticaly. The numbers from the placard are as follows:
SN JDB 633AL2404
MD 1425873
MF AR-50147
Thanks for your help.



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msb

04-10-2006 20:11:28




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 Re: JD4020 wont run in reply to Scott Tebault, 04-10-2006 06:23:00  
Its a DB pump.Sounds like the pump needs rebuilt.



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