4430 fuel lift pump. Can they be rebuilt?

tractorguy2 · Sep 23, 2021

I think my early 4430 is leaking fuel into crankcase. Appears to be about one inch over full.

I assume the problem is the lift pump on the injector pump?

I checked on John Deere's site. My dealer wants $597.99 for the lift pump. Is it possible to rebuild my pump?

We have not used this tractor since 2013. I start it twice a year to just drive it around a little and then park it in the shed. Dad has Parkinson's and is now ready to sell it. Trying to get it ready.

SVcummins · Sep 23, 2021

Id look for an aftermarket one . Its a Bosch pump arent they?

SVcummins · Sep 23, 2021

Tx Jim · Sep 24, 2021

If fuel is getting into engine crankcase then inj pump shaft seal is faulty. Lift pump is driven by IP not engine camshaft.

wore out · Sep 24, 2021

(quoted from post at 02:47:20 09/24/21)
If fuel is getting into engine crankcase then inj pump shaft seal is faulty. Lift pump is driven by IP not engine camshaft.

Jim, you're having a "brain fart", it has a Bosch pump (or clone) so the pump crankcase has engine oil flowing through it, so no shaft seal. NO offense intended!;-)

.

Could be the O-ring that seals the transfer pump plunger drive pin (12), or one or more O-rings that seal the injection pump plunger barrels, IMHO

Dieseltech · Sep 24, 2021

The early Bosch supply pump kit is DGK 301, and has the spindle o ring, gaskets and valves to repair the pump.

Tx Jim · Sep 24, 2021

wore out
OOPS
No offense taken because I welcome to have my mistakes corrected which unfortunately seem to be increasing with my AGE.
Thanks for correcting my mistake.

This post was edited by Tx Jim on 09/24/2021 at 05:21 am.

4430 fuel lift pump. Can they be rebuilt?

tractorguy2

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SVcummins

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SVcummins

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Tx Jim

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wore out

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Dieseltech

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Tx Jim

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