1st time to the forum here. New to me tractor MX 5200 started overheating the hydraulics not long after I got it. Bucket would start to run slow After about 30 minutes of heavy operation, Even after radiators were blown out with air nozzle. Only 750 hours on the tractor and hydraulic filters were changed about hunderd hours ago By the seller. Where should I start with diagnosis I do all my own mechanic work. Also I don't have a workshop manual like I did for the last tractor what would you suggest