The Case IH 87517776 Slip Clutch is a genuine OEM replacement part designed for Case IH LB series square balers. This critical component provides essential driveline protection by allowing slippage when torque exceeds a predetermined limit, preventing damage to the baler's internal mechanisms. It supersedes part number 87399252, ensuring compatibility and reliable operation for various LB332, LB333, LB334, LB432, LB433, LB434, and LB436 models.