I assume you've already sorted your issue but this may be help full to others
Caterpillar do the tracks on the Hurricane.
The bearings for the 8018 tracks are front idler bearing 6206RLO and bearings in the idler wheels underneath are 6204ROL The ROL isn't really to relevant original bearing are PEER brand.
To get the bearings off the front idler you need to punch out 2 roll pins. Mine were so seized I got them electoro eroded out & replaced them.
I am almost certain the 7015 tracks are identical to the 8018 so should be same bearings