new style injector pump

Hi David,

I don’t have any information about the new style pump but on my 284 the fuel leak was from the lift pump. I replaced it with an electric pump and just made a plate and gasket to cover the hole.

I put a clear tube on the overflow elbow and stuck a bold in the end to plug the tube. That way I can see if there is any overflow. Usually a teaspoon full in about 50 hours. I think it might be fuel from the IP but I change oil every 100 hours with the engine so it doesn’t matter unless it gets worse.

There is a little o-ring on the plunger between the crankshaft side and the fuel side. I couldn’t keep one working in there. An absolutely wrong seal type for that application.

I had an old solenoid type impulse fuel pump on the shelf so I made a bracket and mounted that. Since I had done the Ranch Hand upgrade to the fuel bowl connecting the supply side was easy. I discovered that if you cut the ferrule off of the banjo fittings they just slide right out and 1/4″ ID fuel hose would slide on. I made a new hose to go from the new pump to the fuel filter using one of the banjo ends and hose clamps. Wired the fuel pump to the hot side of the key switch and it will move fuel up into the filter until the internal pressure limit is hit then turn off. It rarely makes more than one stroke when operating properly. No need for a hand primer pump.

The lift pump is held to the IP with two bolts. I had some pieces of aluminum about 1/8″ thick laying around so I traced the shape of the pump housing and made a plate. Cut out a gasket and covered it all up. Hasn’t been off since.

I can post pictures if you like.

Here is my IP data plate.

Apologies: I previously said the lift pump had two bolts. It actually had 3 studs.

Hope this helps

I have the engine parts book if you ever need anything, I can scan it and send it to you. The drawings are pretty clear.

There is no breakdown of the pump or even the hand pump. The book shows the same part number though.

3I329 (not a 1).

If I remember right, Bob R said it was a copy of a Bosch pump.

I suspect there will always be a little leak-by of diesel from the IP down into the crank sump. The Bosch’s may not leak but the copies are certain to as they are not made to the same tolerances. At least that is my experience with the hydraulic side of these tractors.

My engine is the Y385T and that is what the book is for, but in some places it shows Y380. Not sure what the differences are.

Why change???The DSL in the injector pump can be drained and changed…If it is in your crankcase it will cause crankshaft problems…This is the best system…leave it alone.
The Y380 engine is completely different to the 385.
Y380 is much better engine…direct injection, makes it a much better starting engine.