John Deere 750 Injector Pump Problem

[Wally Manuel]

I need some help. I have a 1981 JD 750. The tractor had some water in the fuel line, past the filter by the previous owner. I cannot get any fuel past the injector pump. I removed the pump and cleaned the water out of the pump; at least I think I got it all. I still cannot get any fuel past the pump. I have a good supply out of the filter, with new fuel lines. Any help would be appreciated.

Thanks
Wally

 

[MSM]

Water is death on an injector pump due to the extremely close clearances. It may pay you to send the pump to a shop and have it checked or rebuilt.

 

[Anonymous-0]

As I recall, isn't that a Yanmar engine with an inline triple pump assembly? If so, it has a separate pump for each cylinder, i.e. it has three pumps with a central control for fuel rack and governor. Seems unlikely that all three stopped working unless they are all siezed. I'd pull it off and make sure the plungers aren't stuck.

I've freed many in-line pumps that got stuck plungers on Deere/Yanmars, IH and Ford tractors, etc.