RD6 Track compatibility

I believe the 4 & 5 r series D6, 8 & 9 u series D6 and D6 B all used the same pitch chain, just more links. Also some of the 955 track loaders used the same chain. And possible others such as a Cat 40 and R5.

Thanks Ray, Do you know if the D4 6U or 7U is compatible?

Same pitch but D4 track is narrower.

Thanks Old Magnet, would that pitch be 171 and is it the chain that is narrower?

Pitch is 6.75" and yes the D4 chain is narrower.

Sorry 171mm which is 6.75" Thanks for your help.

D4 bottom rollers fit the RD6 track frames, if your front idlers are a bit worn, D4 tracks will fit, I have a RD6 running D4 chain happily.