OIL ON BRAKEBAND !!!!!!

[spenceraucoin]

Hello got oil on brakeband on my 1010 dozer changed seal once and put it in wrong so i had to change it again, I put the new seal with lip towards ring gear, work machine maybe 2 days a month, worked fine for 2 times sence i changed seal then got on side of hill with machine then little oil driped out the bottom of drain hole.I cleaned band with brake band cleaner and worked dozer rest of the day and it worked fine no oil? NEED HELP