D6D and D6C Undercarriage Similarities

I believe everything is the same except the bolt holes on the bottom roller mounts are larger for the D6D.

Casey

D6C and D6D is the same except bottom rollers depend on serial number.
Rails can be either 5/8 or 3/4 shoe bolting.

My D6D SA has 6 bottom rollers per side and SALT (sealed and lubricated tracks). Did the D6C have 6 bottom rollers and SALT rails also?

Same roller count.
Same link assy numbers:
3P1088 for sealed.
3P1118 for sealed amd lubricated
Both 3/4" bolting

Is there a requirement to have a certain number of single flange rollers and double flange rollers, or do these dozers only use one kind? I never did understand why there are the two styles.
Thanks

There are a certain number of single and double flange rollers, always a single next to the sprocket, fit them the way they came off, if you are not sure, I have the roller patterns in my CTS book. the '3P' SALT and sealed track use the same individual link numbers.

There are a certain number of single and double flange rollers, always a single next to the sprocket, fit them the way they came off, if you are not sure, I have the roller patterns in my CTS book. the '3P' SALT and sealed track use the same individual link numbers.

I was told by an old hand that he ran all double flange except for the rear roller. Especially if you don't have rock guards. My "C" does not have rock guards, so I have 5 double flange and one single on each side. He claimed that it encouraged the track to stay under the frame and not head down hill on its own when on a slope. 😊 I think the Cat standard is 3 of each on each side in a front to rear, "double to single order"