Okay, guys me again, cat 259D, one of my final drives started spewing hydraulic fluid yesterday & completely drained the system and I am stranded.... Got track out of the way, got everything all cleaned up so I can see everything, put fluid and started it up. It's coming from the backside of the final drive, not a line/ fitting... if I was to pull the final drive myself, whats the chances this is something simple like an O ring Or am I completely screwed & I need a final drive... just your thoughts as I understand you can't repair it online.... or just call Cat field service.