OK request send SAA6D140E-5A S/N 535838-UP (For WA500-6) ENGINE COOLING SYSTEM Section ENGINE COOLING SYSTEM SAA6D140E-5A S/N 535838-UP (For WA500-6) Komatsu: WATER PUMP e001000 CORROSION RESISTOR, HARD WATER AREA ARRANGEMENT SPEC. e002000 CORROSION RESISTOR, WITHOUT CORROSION RESISTOR e003000