2008 Case 420ct Series 3 aux hydraulic issue

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I have a 2008 case 420ct series 3. Issue I am having is when running an attachment like my brush cutter which is well within the specs of hydraulic flow for the machine it will randomly cut out. When I first get in the machine and start using it, the brush hog may run for 10 minutes no problem or not. When it has issues it will stop itself all the time or spin so slow that I can’t even notice it on. Has anyone had an issue like this and might have some guidance?