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560-diesel pump question?

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Greg

11-15-2003 14:56:29

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I have a 560 -d It hasn't been ran in years.I have fuel to the pump and fuel coming out of the return side of the pump,but there is no fuel going to the injectors.Could I have an air pocket or a bad injector pump ? Any help would appreciated.Is there any way to purge the pump itself of air?

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Danny

11-16-2003 20:18:47

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Re: 560-diesel pump question? in reply to Greg, 11-15-2003 14:56:29

Check the plunger for the fuel shut-off. It is under the top cover on the pump. They can stick in the "off" position. By working the kill lever and plunger you may be able to free it up. Good luck!

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Dave560

11-15-2003 17:24:32

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Re: 560-diesel pump question? in reply to Greg, 11-15-2003 14:56:29

I had the same situation. Tractor sat for 14 years, and wouldn't start. Fuel to the pump and fuel out of the return line, but nothing to the injectors. I tore the pump down, cleaned it and replaced the rubber parts and now the tractor runs like a top. I bought a Blue Ribbon service manual for the pump from Binder books. Excellent manual. Made rebuilding te pump a snap. The key thing to remember when re-assembling the pump is to keep everything CLEAN. I've rebuilt 5 pumps since then and no problems with any of them.

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Bob

11-15-2003 15:22:33

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Re: 560-diesel pump question? in reply to Greg, 11-15-2003 14:56:29

If I recall, this is a Roosa-Master DB series pump. If this is correct, and you have loosened the lines at the injectors, and have cranked it sufficiently, the plungers in the pump may be stuck in the retracted position by varnish and gook. Fuel pressure is supposed to push these out between injections, and allow them to refill with fuel. Most likely, this will require removal and dis-assembly of the pump to free the plungers.

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Ohio Hick

11-15-2003 15:28:04

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Re: Re: 560-diesel pump question? in reply to Bob, 11-15-2003 15:22:33

You will have to loosen the lines at the injectors if air got into the system. Be careful if the nut doesn't swivel on the line it will kink the line.

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