1. Low hydraulic fluid level: If the hydraulic fluid level in your tractor is too low, it may not be able to provide enough pressure to the hydraulic motor that drives the rear wheels. Check the hydraulic fluid level and add more if necessary.
2. Faulty hydraulic pump: If the hydraulic pump that supplies pressure to the hydraulic motor is faulty, it may not be able to provide enough pressure to drive the rear wheels. Have the hydraulic pump inspected and replaced if necessary.
3. Faulty hydraulic motor: If the hydraulic motor that drives the rear wheels is faulty, it may not be able to convert the hydraulic pressure into mechanical motion. Have the hydraulic motor inspected and replaced if necessary.
4. Faulty drive belt: If the drive belt that connects the hydraulic motor to the rear wheels is faulty, it may not be able to transmit the power from the hydraulic motor to the rear wheels. Check the drive belt and replace it if necessary.
5. Faulty control valve: If the control valve that controls the flow of hydraulic fluid to the hydraulic motor is faulty, it may not be able to regulate the amount of fluid that is flowing to the hydraulic motor. Have the control valve inspected and replaced if necessary.
