4320 John Deere adding oil

[Joe ellis]

Rowcrop 4320 not the little small one is adding fuel into the oil. Brand new rebuilt injector pump injectors and lift pump installed at the same time. Over the course of prolly 10 hours of loader work it’s added prolly 3/4 of an inch to the dipstick. only thing I’ve noticed is with both old and new lift pump they leak slightly from where it bolts onto the block. What’s chances of it being a junk new one or more than likely I messed up the umbrella seals?

 

[Harry in Ky]

Did the injection pump come back with the shaft installed, or was the shaft left in the engine and you slipped the pump back onto the shaft? If option 2 was used it's probably got a rolled umbrella seal on the shaft.

 

[used red MN]

The cheapest thing to check is removing the lift pump washing the oil side out with solvent and brake clean, clamping it in a vise and rigging hoses up to a fuel container and stroke the pump by hand while looking for leak evidence. Or just replace it, I see this site shows one for $80. I could waste some time messing around with the above test for $80. Having fuel dripping out of the oil side when you carry it back to the vendor gets you a free pass on the warranty. On the other hand it could be the umbrella seals.

 

[Joe ellis]

The cheapest thing to check is removing the lift pump washing the oil side out with solvent and brake clean, clamping it in a vise and rigging hoses up to a fuel container and stroke the pump by hand while looking for leak evidence. Or just replace it, I see this site shows one for $80. I could waste some time messing around with the above test for $80. Having fuel dripping out of the oil side when you carry it back to the vendor gets you a free pass on the warranty. On the other hand it could be the umbrella seals.

Well the old one with it on the tractor with The supply line hooked up and a little rubber hose ran to a tank I could pump it and watch fuel shoot out the back. I should have prolly checked this 1 but I didn’t it did look like the box had been opened before now that I think about it. My luck they gave me a old one someone had returned thats junk.

 

[Joe ellis]

Did the injection pump come back with the shaft installed, or was the shaft left in the engine and you slipped the pump back onto the shaft? If option 2 was used it's probably got a rolled umbrella seal on the shaft.

I did do option 2 cause it’s annoying to pull the timing cover off just to pull the shaft but usually if you roll the umbrella seals you can usually feel it try to push the pump back off and i Didn’t notice it try to do that. I’d atleast rather deal with fuel in oil instead of water in it

 

[used red MN]

Well the old one with it on the tractor

I suspect by what you are implying the “old one” is the replacement lift pump? Sounds like you evaded pulling the IJP again, good work!

 

[Joe ellis]

I suspect by what you are implying the “old one” is the replacement lift pump? Sounds like you evaded pulling the IJP again, good work!

No the other lift pump I replaced done that I still gotta check this one but thats gonna be a plan for tomorrow or next Tuesday. But now that im thinking about it was supposed to be new and Ordered in from deer but it had been opened and pulled out the plastic so this thing may of been defective and they sent it to me instead of junking it

 

[mrslesq]

Rowcrop 4320 not the little small one is adding fuel into the oil. Brand new rebuilt injector pump injectors and lift pump installed at the same time. Over the course of prolly 10 hours of loader work it’s added prolly 3/4 of an inch to the dipstick. only thing I’ve noticed is with both old and new lift pump they leak slightly from where it bolts onto the block. What’s chances of it being a junk new one or more than likely I messed up the umbrella seals?

Years ago after my uncle Floyd (a mechanic of many decades) had the injector pump repaired on my 4320, oil level kept rising. Turned out he had messed up the umbrella seals. He said that never happened before. That would be my guess.

 

[wore out]

No the other lift pump I replaced done that I still gotta check this one but thats gonna be a plan for tomorrow or next Tuesday. But now that im thinking about it was supposed to be new and Ordered in from deer but it had been opened and pulled out the plastic so this thing may of been defective and they sent it to me instead of junking it

You should be able to take the nuts off of the lift pump mounting studs and "find" enough "give" in the steel lines to work the pump away from the block a half-inch or so and leave it for half a day and note if any fuel leaks out the engine side.

 

[Joe ellis]

You should be able to take the nuts off of the lift pump mounting studs and "find" enough "give" in the steel lines to work the pump away from the block a half-inch or so and leave it for half a day and note if any fuel leaks out the engine side.

I’ll Try it and see what happens. last time I pulled it off and hooked the inlet up to the tank on the tractor and run the outlet into a 5 gallon bucket and pumped it and seen what happened. But it only adds oil when its running that’s why I didn’t think it was umbrella seals everytime I’ve had issues outta them it adds piles of oil not a little bit over the course of days. I rolled the umbrella seals a few years back on an Oliver 1855. and it filled the crankcase full in about 30 minutes to a hour of run time This is more gradual

 

[ss55]

The cheapest thing to check is removing the lift pump washing the oil side out with solvent and brake clean, clamping it in a vise and rigging hoses up to a fuel container and stroke the pump by hand while looking for leak evidence. Or just replace it, I see this site shows one for $80. I could waste some time messing around with the above test for $80. Having fuel dripping out of the oil side when you carry it back to the vendor gets you a free pass on the warranty. On the other hand it could be the umbrella seals.

gets you a free pass on the warranty
Does that mean the warranty is void or does that mean an automatic replacement?

 

[Joe ellis]

gets you a free pass on the warranty
Does that mean the warranty is void or does that mean an automatic replacement?

Should mean automatic replacement if you take a brand new pump back and it’s leaking into the motor

 

[wore out]

I’ll Try it and see what happens. last time I pulled it off and hooked the inlet up to the tank on the tractor and run the outlet into a 5 gallon bucket and pumped it and seen what happened. But it only adds oil when its running that’s why I didn’t think it was umbrella seals everytime I’ve had issues outta them it adds piles of oil not a little bit over the course of days. I rolled the umbrella seals a few years back on an Oliver 1855. and it filled the crankcase full in about 30 minutes to a hour of run time This is more gradual

Well, the injection pump housing is pressurized to around 5 psi when the engine is running, so that might be forcing fuel past a slightly damaged umbrella seal.

Is the "tube" the shaft runs in free of wear or damage?

 

[Joe ellis]

Well, the injection pump housing is pressurized to around 5 psi when the engine is running, so that might be forcing fuel past a slightly damaged umbrella seal.

Is the "tube" the shaft runs in free of wear or damage?

the shaft and pilot tube was like new and the pump was rebuilt prolly 20 hours ago and it was adding oil before and is still adding oil. The Reason the pump was rebuilt was governor was going out so new injectors and pump. The tractor has got more issues from sitting than it does wear from being used.it was redone in the 80s and has had 600 hours put on it since then.