Injector Pump Question

[Vally Farm]

Went to change oil in the injector pump, but fuel came draining out! :shock: What does this mean, and what should I do? The tractor has been running fine. Should I just let it go? Mike

 

[D&Dservice]

:?: :?: :?: :?: :?: :?: :?: :?: :?: :?:

 

[Jeff in TX]

An injector pump is basically a fuel pump. It is what pumps the diesel to the injectors. Hence the name. What do you mean you was changing the oil in it? It really should not have oil in it. What kind of tractor? That would help to know.

 

[rick in sc]

I take it that this is a Simms pump on a Ford tractor since you're changing the oil in it. They will collect some fuel in them with use, but when the fuel pump (the one bolted on the injection pump) diaphram fails it will also fill the pump cambox up with fuel. If it were mine, I would go ahead and replace the fuel pump.

 

[ben brown]

replace the fuel with oil. have one on a custmers 7000 ford been like that for some 15 years still going it probly quit one day but the rest the tractor is about shout any way.

 

[Dan-IA]

Hey Valley, are you new here? I don't recognize your name. Welcome!

That said, I never heard of changing the oil in the injector pump, I thought that the pump was lubricated by the diesel fuel it pumps. That's why there was a lot of hullabaloo about the pumps going out when the EPA said we needed to go to low-sulfur diesel.

 

[Anonymous-0]

if you have a Sims pump you better be changing the oil in it [fords some, Leland and nuffield sure there are others

 

[RodinNS]

Simms/Minimec pumps require oil changes unless their level and drain ports are plumbed into the engine. I believe some American Bosch pumps are also plumbed to the engine although I'm not certain on that.
My experience with the Simms pumps is that most leak at the drain and are empty unless maintained quite frequently..... so I'd expect a bad diaphram in the lift pump if the cambox is full of fuel.
Some fuel bypass on the pump plungers into the cambox is normal, but it would not be a lot unless the pump was poor, the drain plug wasn't a leaker or the oil hadn't been changed in a rather long time...
I'd change it and see what happens after 10 hours and then go from there.

Rod

 

[Anonymous-0]

There are plenty of old style pumps that you have to change the oil in them. Most recommended changing the oil in the injector pump at the same intervals you change the engine oil. It doesn't matter what kind of tractor it is but knowing the kind of pump would help.

 

[Vally Farm]

It is a Bolens G212 with an Iseki 3 cyl engine. Says to check oil livel in injector pump every 50 hrs, change every 300 hrs. Says this right on the pump, not just in the books. I've been on this forum for the better part of a decade, just over in the IH/Farmall section. Mike

 

[kyhayman]

My 7710 does this all time. Its the only one of my Fords to really fill up the pump cam box with fuel. Its been like that since I got it, through 2-3 new lift pumps. I've always suspected the plungers are getting some wear on them but Im of the school of thought at this point to not fix something that isnt broke.

 

[JDemaris]

I wouldn't worry about it. Many of the older in-line pumps either get saturated with diesel fuel - or dry out and sieze plungers. All an in-line pump is - is a set of separate injection pumps - one for each cylinder - riding on a common camshaft. It's the camshaft that requires the oil. As those individual injector pumps get worn, they drip into the camshaft box. No big deal. Drain/check once in a while, refill, and don't worry about it. I've got several in-line Simms and some in-line CAVs - and they all do it.
I've also had to unstick many that got run dry. Often - one pump plunger will get stuck and the tractor starts skipping. I've pried many loose with a screwdriver - then filled the cam box with fresh oil - and all worked fine again.

Newer pumps are often more sophisticated and use a common fill from the engine's oil.

 

[Anonymous-0]

Happened to me also on purchase of a Leyland. Just change the oil more often.

 

[Vally Farm]

Thanks guys! I guess I'll just drain and re-fill every 50 hrs when I do the oil/filter. Apreciate the help. Mike