I installed a Summit Engineering Third Function Kit on my 2021 L2501 HST. I must have installed something in correctly as now I have no power steering. All other hydraulics including third function control work fine. Steering is extremely difficult unless tractor is moving or all weight is off front end. I tried to double check the hose connections but the identification on the ports are confusing and do not correspond directly to the instructions that came from Summit. My dealer has offered to take a look at it but that means trailering the tractor 60 miles.