No, there is not a set greasing schedule for all tractor fittings. Depending on the type of tractor and the type of fittings used, the frequency of greasing may vary. Refer to the manufacturer’s instructions for your specific tractor model to determine the best greasing schedule for your tractor’s grease fittings. Inspect your grease fittings regularly and ensure that they are properly lubricated to maximize their lifespan and prevent damage or wear.