Kubota K3021-13560 is the hydrostatic transmission drive belt on Kubota zero-turn mowers, transferring power from the engine to the hydrostatic transmission pumps that control ground drive and speed on both sides of the machine. It spans the engine pulley and HST pump pulleys, running under tension to deliver consistent power through the full operating range.

A worn or cracked HST belt causes sluggish response, loss of drive power, or complete failure to move. These are symptoms that are easy to misdiagnose as transmission problems when the belt is actually the culprit.

• Restores full ground drive response
• OEM-spec length & construction
• Replaces worn, glazed, or cracked belts