Aquabot No Suction and Not Climbing Wall

by Charles
(Round Rock, TX)

I own an Aquabot and the other day I discovered it was not climbing the walls and not sucking any dirt. I pulled it out off the water and checked of any obstruction around the impeller. I did not find anything and when plugged in and submerged underwater I had to spin the impeller manually which kicked on and then stopped. So I decided to investigate further and accidentally unscrewed the casing screws and oil gushed out. What kind of oil, how much, and how do I replace the oil? Also, what can be wrong with the pump?

Please help!!

Thanks in advance.