OK request send SAA6D140E-5A S/N 535838-UP (For WA500-6) ENGINE FUEL SYSTEM FUEL FILTER CARTRIDGE Section FUEL FILTER CARTRIDGE SAA6D140E-5A S/N 535838-UP (For WA500-6) Komatsu: FUEL FILTER CARTRIDGE, SERVICE ONLY (#535838-536844) d010001