Mini Ex Questions - Volvo EC20B

Just purchased a used Volvo mini-excavator and have put 30 hrs on it and have a few questions being new to heavy equipment.
I have been greasing the zerks every 10-15 hrs that I can find but other then the track tension, I can't find anywhere to lube the track rollers/ sprocket and they are getting noisy. Is there a need to lube these parts or is it just a matter of blasting them off with a hose to keep them free of dirt and squeaks?
Also, when engaging the high speed (haha) the excavator...

Mini Ex Questions - Volvo EC20B

Mini Ex Questions - Volvo EC20B