7 0 Mack E7-300 Engine Oil Pump for a 1999 Mack MR688S $100 USD Good Used, Mack, E7-300, Oil Pump and Pickup Tube. Casting Number on Pump is (767GB54M) (767GB56M). Number on Pickup (497GB440). (Engine S/N#. 9d3767). Please see pictures. Please call or... ConditionUsedFits To Make(s)MackFits To Model(s)MR688SWill Fit Year(s)1999Part NumberP-4780Stock NumberP-4780 MLS Number9635290CategoryEngine Oil Pumps Last Updated12/18/2023 LocationKankakee, IL, US Sold ByRiver Valley Truck Parts (844) 604-___ SHOWNUMBERCall Seller Email Seller Save More Info