A friend just bought a farragon( Danfo) from Cotonou last month for commercial purpose, Problem is that the alternator belt always slip and burnt causing the fan to stop working and then over heating the engine. The alternator has been worked on and belt changed severally but when the vehicle travells long distance( from oshodi to Mile 2) the belt slips and got burnt. What is the problem as he confused. Thanks for your response.