1995 Freightliner FL50 Engine: 7.2L L6 DIESEL; Position: Fan, Alternator and Air Conditioning;. 1996 Freightliner FL50 Engine: 7.2L L6 DIESEL; Position: Fan, Alternator and Air Conditioning;. 1997 Freightliner FL50 Engine: 7.2L L6 DIESEL; Position: Fan, Alternator and Air Conditioning;.