Machine description: 1981 Caterpillar 623B water wagonHours: 20,834 on meterSerial: 46P01691EngineCaterpillar 3406DICylinders: 6Fuel type: DieselTransmissionPowershift8F - 1RFeaturesWater tankCapacity: 8,000 gallonsSpray ... more info about the 1981 Caterpillar 623B.