D6 sprocket wear pattern

my initial thoughts would be track frame alignment, sprocket hub splines, sprocket bearings or bent dead axle causing a misalignment where the track was trying to climb the sprocket. i had a similar looking sprocket on one of my machines, the outer sprocket bearing was shot/completely disintegrated, and the sprocket was loose on hub at the splines. the track frame was also toed out on the one side as the inner bearing for the track frame that clamps around the dead axle under the tub ahead of the drawbar was missing one of the half shells. my dead axle was ok.

Well, that's all very good news - not !:rain:

I suppose I can check for a loose bearing now, while I have the track loose and the back sprockets off the ground ? Is there a procedure in the service manual ( I will look).

I assume the rear sprockets should align parallel with the front idlers. Can I check that with a string, the same way I have set the toe on a car ? ( in my garage)

Thank for the info

Parallel and in the same plane (not shifted over laterally), and the track frame / rollers should also be in that plane and parallel. There are some adjustments I believe (I only know about the D2 adjustment) but if components are worn, they'll need swapping out

Thats generally from loose tracks, the rollers will climb on top of the rail when turning or working on a slope, the rail then catches the sprocket and knocks the corner of the sprocket teeth off.

The rollers closest to the sprockets were effectively non existent, meaning the axle was there but not much else. I raised up the back end and with a big bar can't get any movement out of the drive sprocket. ( but still need to read up on this)

With a string it appears I am in the ball park with track alignment . I'll check it all again after I get new rollers on and tracks tightened up. Hopefully the problem that caused it was since repaired.. (Fingers crossed)