View 2 Photos View 0 Videos Mack ENDT 676 Fan Clutch for a 1978 Mack RD685S Contact for price (Used) 1978 Mack RD685S, FAN CLUTCH Engine: 1978 Mack ENDT-676, Type: Air, Material: Alumin, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS)... ConditionUsedFits To Make(s)MackFits To Model(s)RD685SWill Fit Year(s)1978Stock NumberP-84922 MLS Number13016941CategoryFan Clutches Last Updated5/13/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info