Simple things first.
Check that the drive belt is sill there and sitting properly on all pulleys.
Check the tension pulley is spinning free and the spring is pulling the belt tight
Check the bypass valves have not accidentially turned onto bypass.
Simple things first.
Check that the drive belt is sill there and sitting properly on all pulleys.
Check the tension pulley is spinning free and the spring is pulling the belt tight
Check the bypass valves have not accidentially turned onto bypass.