4000 3cyl Diesel - Oil Pump Drive

Dave91 · Oct 16, 2016

Hi all,

While rebuilding the engine on my 1973 4000 with a T4 block, I replaced the oil pump I was advised to replace the drive gear and shaft as it showed significant wear.

My tractor has a dynamo so the old drive gear has a blank top with a spacer plate and core plug above it. The new gear is a later style for 600 or 10 series which drives the tachometer.

I have been told the later type gear is the correct replacement - so do I leave the spacer out and put the core plug back in on top of the gear? Has anyone experienced this before?

Thanks,
Dave

RodinNS · Oct 16, 2016

Something sounds strange there... I've changed them out before... and granted I installed the angle drive for the tach rather than putting the core plug back in... I thought that the gears are dimentionally identical save the square hole in the end of the shaft to drive the tach. Are you sure the gear is seating down in place properly?

Rod

Bern · Oct 16, 2016

The spacer #17A is still needed. It makes up for the depth lost when Ford changed over from the threaded plug #17 to the cup plug #17B. Even though your new drive has the square hole for the tach cable, it should be otherwise dimensionally identical to your old one.

4000 3cyl Diesel - Oil Pump Drive

Dave91

New User

RodinNS

Well-known Member

Bern

Well-known Member

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