John Deere 8370R hydraulic diagnostics - This one ALMOST stumped me!

Going back to the 8370R that the customer is complaining of hard steering when turning on the end rows while planting. Got to love a good challenge! Continuing from part 1, I am back to replace the load compensation valve on the main pump that I could NOT get to adjust because the adjustment screw was seized solid. Got to get the main pump pressure up to continue diagnostics. One thing leads to another and I end up having to yank the duals off to make some pressure adjustments and replace the whole entire priority valve housing. Want some ZK merch? Check out my Amazon store front! Want a career with Sloan Implement? To buy the Carpuride W702 for a motorcycle or W903 for a vehicle, go to and use coupon code “ZKMT“ to get $50 off your purchase!