New Holland tractor PTO repair

This is a real hands-on repair diary of a New Holland TC48DA whose PTO won't shut off. The owner pulls the seat, accesses the control valve, inspects the relief valve and its O-rings, orders a $360-ish rebuild kit rather than a $1,600 replacement valve, swaps O-rings, and tests the fix on camera. Best for owners troubleshooting the same stuck-PTO symptom, not for spec-comparison shoppers.

An owner-operator DIYing the repair themselves on their own machine, documenting trial and error rather than presenting expert or dealer credentials.