injection pump swap

brian(MN) · Mar 19, 2015

I have a G900 diesel, runs great but the injector pump needs to be rebuilt. I've got a 900 parts tractor with a stuck engine. Could I take the pump off that one and install it in the good tractor without much trouble? I have never removed a pump before so I am asking you experts if that is something I could do on my own. I have the owners, parts and IT manual saying how to time it and stuff. I have told a mechanic to come and remove it and repair it for me but he never does, has more important machines to work on I guess. I don't know if the replacement pump is good , but it couldn't be worse then what I got in it now. Thanks for any advice, Brian

Dieseltech · Mar 19, 2015

How long since the parts tractor last ran? If more than six months there's a good chance it will have the metering valve and/or the plungers stuck from setting. Just repaired a JD 4020 pump that had several parts stuck inside, a complete cleaning was needed to get it working again.

F-MM · Mar 20, 2015

You never know if it will work or not, I've taken them off several vista's myself and put them back on after having them worked on. It isn't that complicated if you have a manual. I haven't done it in a while but i'm sure you should be able to do it yourself. Some of he lines will have to be taken completely off to get room to move the pump out and a couple can probably stay. Don't loose the tiny washers on each side of the line when you loosen the bolds. One is on the head but another will be in between the line and the pump. I had a G-900 I bought that had sat for many years and I got the engine to turn and it started up and is running still with no pump work. I have seen those pumps fail after sitting too. There is a plastic retainer or something in them that can go bad and they will just start and run a minute then die over and over again. The cure for that is to take it to the diesel shop and they can replace that for a couple hundred bucks usually and check it over too. I have had to do that to at least 3 tractors that sat too long. I have an A4T that has that problem right now but I haven't taken time to get it off yet.

Joe Pro · Mar 20, 2015

Yes, it is a very simple procedure. You need to know the timing marks but usually you can see where it was kind of mounted before and get it close the first time. Also you need to ensure it is clean, clean and cleaner. Its best to replace the washers at this time, (the banjo bolt washers).

I may consider sending out the pump from the parts tractor and having it rebuilt. Once it's rebuilt then I would swap them out. I would connect all the lines at the pump first, then unhook them at the injectors, cover the inlet in the injectors and crank the engine to blow any junk out. then connect the injection lines. Its best to use plastic caps over the injector threads.

If you have more questions just ask.

Alan K · Mar 20, 2015

As was mentioned the rubber flex ring for the governor is probably rotted out. Mine was gone in a running tractor but luckily was ok until I had it rebuilt. Since the one tractor is stuck you would have a time getting the pump / engine timed for removal, but more so you would have to check that the pump its self still moves so it doesn't damage anything in the good motor or in the pump its self.

injection pump swap

brian(MN)

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Dieseltech

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F-MM

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Joe Pro

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Alan K

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