d2 front roller axle shaft

give the model and serial # of your D2 and if single or double flange roller and we can check the part no.
they have different shaft part# depending on the serial #.

Just to be clear, are you talking about the bottom roller or the front idler? if it is the front idler, the 1.75" shaft came in with 5U6129 in 1950, it is common to update older tractors to the "newer" idler assembly.

give the model and serial # of your D2 and if single or double flange roller and we can check the part no.
they have different shaft part# depending on the serial #.

Just to be clear, are you talking about the bottom roller or the front idler? if it is the front idler, the 1.75" shaft came in with 5U6129 in 1950, it is common to update older tractors to the "newer" idler assembly.

I think you may be right cause my other d2 is a 5u15293.
what was the shaft size before that?

The early idler shaft is about 1-3/8".

Are both sides (left vs right)the same ? Is it possible that someone over the years, turned down a worn shaft to the diameter you have and made an undersized (smaller ID)bushing????

John

my early 5U parts book shows the same shaft 7B0618 for the 23 1/2" idler for both sides.
late model 5U shows 8F4896 both sides
Late model 4U shows 8F 4896 both sides
sorry--don't have early model 4U parts book
early model 5J shows 7B0618 shaft both sides.

as per my Cat dealer I got the last 8f 4896 shaft world wide out of Brazil one day before they were recalled back to Cat for extinction!

The information I posted is for the standard 21-1/2" idler, for the 23-1/2" idler, there are other possibilities, best if you get the part numbers on the idlers and on the "bearings", those are the two assemblies that hold the shafts, and ride on the track frames.