* Incorrect belt installation: Make sure that the drive belt is installed correctly according to the manufacturer's instructions. Check the belt routing diagram and ensure that the belt is not twisted or kinked.
* Tension issue: The drive belt may be too loose or too tight. If the belt is too loose, it will not be able to engage the pulleys and drive the mower. If the belt is too tight, it can put excessive strain on the engine and transmission. Check the belt tension according to the manufacturer's instructions and adjust it if necessary.
* Worn or damaged components: The drive belt itself may be worn or damaged, which can cause it to slip or break. Also check other components that the belt interacts with, such as the pulleys, tensioners, and idlers. If any of these components are damaged or worn, they can affect the proper operation of the drive belt.
* Transmission issues: If the transmission is not working properly, it may not be able to engage the drive belt and drive the mower. Check the transmission fluid level and condition, and make sure that the transmission is shifting properly.
* Mechanical issue: There may be a mechanical issue with the mower that is preventing it from pulling. This could be an issue with the engine, transmission, or other drive components. If you have checked all of the above and the mower still won't pull, it is recommended that you take it to a qualified service technician for further diagnosis and repair.
