Roller specs ?? D4 7 series

Can someone tell me or Direct me to find Roller Specifications for  D4 7U series dozer ? I need to replace , top rollers or rebuild two ?? Thanks to all , cheers RobB

join up and use the library. in it you will find instructions for rebuild conservation. the rollers can be welded or built up and reused

Top carrier rollers generally don't bear much weight, I'd keep using them as long as they don't cause trouble and don't have visible damage and/or slop

Those top rollers on D4-7U are 9B-0562.
There are no direct replacement aftermarket ones, I think replacement is possible but from memory it's tricky, needs a new shaft pressed into the tower.

Also check this old thread:
https://www.acmoc.org/bb/discussion-d72/27068-non-current-undercarriage-dimensions