There is another Pump (23506047) which is practically identical but does not have the 1
Reference Mack 5839-89047C
OEM Reference : Perkins® CK142UF
732GB3508M
Select Detroit Diesel® Engines : Series 471 Trunk Style Engines
MaxiForce® Perkins® BK661-20/20 Kit, Basic T6.354.1 3088-22961 There is another Pump (23506047)Product Details : Select Perkins Applications. OEM Reference : Perkins BK661 20 20. Please do not hesitate to contact us with your vehicle, engine and or part(s) details to determine if this product is appropriate for your particular engine and or application. MaxiForce : Brand New, Premium Replacement Parts Coverage for Caterpillar, Cummins, International Harvester, John Deere, Komatsu, Mitsubishi, Navistar, Perkins, Shibaura, Thermo King and Yanmar