Where is the serial number on Massey Ferguson 135?

The serial number on a Massey Ferguson 135 tractor is typically located on the left side of the tractor's frame, just above the front axle. It can also be found on the engine block, usually near the starter motor. Additionally, the serial number might be stamped on a metal plate attached to the dashboard or the instrument panel. Always check the owner's manual for the exact location, as it can vary slightly by model year.