OK request send SAA6D140E-5A S/N 535838-UP (For WA500-6) ENGINE COOLING SYSTEM CORROSION RESISTOR, HARD WATER AREA ARRANGEMENT SPEC. Section CORROSION RESISTOR, HARD WATER AREA ARRANGEMENT SPEC. SAA6D140E-5A S/N 535838-UP (For WA500-6) Komatsu: CORROSION RESISTOR (#535838-) e002001