Ranger Fisherman Series Owner's Manual page 63

Your RangerTrail
COOL HUB ADDENDUM
2007 model Ranger COOL Hubs now have a 3 year "No Touch"
warranty. There is no required maintenance for three years from the
original date of purchase. If for some unforeseen reason the hub
develops an oil leak, it will be replaced free of charge. Please note that
the color of the oil will change over time and does not indicate a problem
that requires any action.
After three years the hub needs to be serviced by draining and refilling
with 50 wt oil.
® Trailer
66.1