The power steering fluid reservoir on a Ford 4610 tractor is typically located
on top of the power steering pump. The power steering pump itself is usually situated on the front of the engine. It's a relatively small reservoir, often with a dipstick or a visible fill line.
However, it's crucial to consult your owner's manual for the exact location and type of power steering fluid to use. The location might vary slightly depending on the specific configuration of your tractor. Using the wrong fluid can damage the system.