I was at a tractor show recently and saw some sort of metal loop/spring on the left brake. What is it? April 28, 2014.
That’s a Brake Hand Lever. It came in Kit # A-TO-74 or MF # 181 861 M91. This accessory allowed the operator to engage the left-turning brake while operating the clutch. Because the left-turning brake and the clutch pedal are both on the left side of the tractor it is impossible to use your foot to operate the left brake and the clutch at the same time. I’d really like to have one of these if you ever come across one. A similar handle was available for the Ford Ferguson 9N and 2N. There are two versions of that handle, one with a long handle and one with a short handle.