actually i have never oiled the bearing with the hopper on. what i do is remove the hopper. the first time i removed the bolts (what a pain) to remove it. anymore i just pop the top out of the lip of the bracket and out it comes.
with the hopper off you have direct access to the bearing oilers. when removed (annual cleaning) i vacuum out everything from the feed block to the back of the motor frame. oil the bearing and spray LPS under the block and work it in.
replace hopper and your ready to go for another year