We changed the fluids in the tractor: hydraulic fluid in the hydraulic reservoir (topped off), hydraulic fluid filter, hydraulic fluid in the torque tube (drain and refill), gear oil in the steering box, gear oil in the transmission (flushed with diesel), engine oil and filter, and grease in as many grease fittings as we could find. I also topped off the coolant and installed a new radiator cap. The oil in the transmission was like milk, and the oil in the engine was blacker than black. We found a large screwdriver in the transmission.