I have a TL150 & are considering a mulching head attachment for it. Haven't looked at the specs for the mulching head regarding the hydraulic psi or flow , but was looking for advise about which attachment works best on the skid steers. Have about 50 acres of thickets/underbrush I was wanting to get done before fall.
None of my TL150 machines have high flow. It was, apparently, a rare option, as it is in the parts books. 23.4 gpm at 3000psi Not enough to run my cold planers or wheel saws.
I like these guys, though no affiliation other than buying a few attachments from them. They will spec the hydraulic motor to you machines flow rate. https://www.skidpro.com/
The only TL150's I've seen setup with high flow hydraulics, extra cooling, and a lexan front door were factory modified machines by a company called Supertrak. In your situation, a quality brush cutter would be your best option on your current machine.