As NapaJohn said, if you're not going to take it in, you need to be both technician and owner and do the work of both. The owner's manuals are misleading this way (and a big pet peeve of mine because of it).
The nose will come off via a couple of small screws that point downward (only the tops of them will be visible now that you've taken the top off. One close to the front of the nose piece and one close to the back. Loosen but don't remove them both and pull the nose piece off to the left. That will give you access there. For the bottom - you need to take the heavy base off (I don't remember off the top of my head where the motor is mounted, so you may not get the base 100% off but you can pivot it out of the way to do the rest of the oil and greasing.
And yes, check the cam gear. I forgot to mention that. That's what happens when I answer past my bedtime.
