Lawn-Boy Wheel Gear Assembly

This part is designed as a direct replacement for model number 137-4835. To ensure a perfect fit, check your mower's owner's manual or the parts diagram for your specific serial number to confirm this part number is listed as a compatible component.

This assembly is typically specific to the drive system configuration of your mower. Please verify your mower's parts list, as drive gears are often side-specific or front/rear-specific depending on whether your mower is front-wheel or rear-wheel drive.

You likely need a replacement if your mower's self-propel feature feels weak, slips during operation, or makes a grinding noise when engaged. If the teeth on the existing gear are visibly worn down or stripped, the gear is no longer able to maintain proper traction.

This component is engineered specifically for Toro and Lawn-Boy equipment. While some parts may share dimensions with other brands, it is strongly recommended to stick to the manufacturer-specified part number to ensure the gear pitch and engagement match your drive system exactly.

Generally, you will need basic hand tools such as a socket wrench set and perhaps a pair of snap-ring pliers to remove the retaining clips holding the wheel and gear in place. Consult your service manual for the specific disassembly steps required for your model.