The John Deere AL40978 Load Control Shaft Service Kit is a genuine OEM replacement part designed to restore or maintain the load control system in a wide range of John Deere tractors. This essential service kit ensures proper function of the load control shaft, critical for hydraulic system performance and implement operation. It is compatible with John Deere 840, 940, 1020, 1030, 1040, 1120, 1130, 1140, 1630, 1640, 1830, 2020, 2030, 2040, 2120, 2130, 2140, 2250, 2450, 2650, 2850, 3030, 3040, 3050, 3120, 3130, 3140, 3350, 3640, and 3650 series agricultural tractors.