Cat 226d skid steer bogging down issue

[cfoss2010]

Hello I've owned this machine for a few years now for yard work and small jobs. Bought it new and have had it maintained regularly for the most part.

I've noticed after sometimes up to an hour the machine starts to operate slower and will eventually end up bogging down and stalling. Without any error codes popping up. If I turn the machine off then it will turn back on after a few cranks. I've had a friend look at it and he said everything check out but this has happened just about every time now since. I've tried to call the tech help line but have yet to receive a call back after 2 messages and days have passed. Any information would be greatly appreciated

 

[foton]

just as a check off the list ,check all your fluid levels and does the oil look clean and uncontaminated and how long has it been since the filters were changed out.