i have a 2015 bobcat s510 it will run all day no problem but when i hook my brush cutter to it and run it for 10-15 mins in the field cutting it starts overheating. and it'll throw codes for hydraulics overheating and the machine itself will start running hot. im new to working on my own machines i know the basics i guess. the hydraulic fluid and anti-freeze reservoir tanks are full. like i said it only does it with my brush cutter. i run a grapple all day with it everyday and it works fine but as soon as i run my brush cutter it just doesn't like it. any ideas on what to check or replace?