CARRIER-BEARING 1T1339 - Caterpillar

All Machines Using The 3E-2030, 3E-6428, 3E-6430, 9X-3040, And 9X-7088 Coolant Flow Switch Groups.Description of Change: The listed coolant flow switches have been improved with a new higher strength casting which should reduce the possibility of a leaky coolant flow switch.Adaptable To: The improved 3E-2030, 3E-6428, 3E-6430, 9X-3040, and 9X-7088 Coolant Flow Switch Groups are effective with date code P48 with P representing year 1994 and 48 representing the 48th week of the year. The improved switches are adaptable to all earlier applications. There may be situations where coolant, when mixed with local water, can produce a corrosive solution that attacks the aluminum housing of the switch. This can cause coolant flow switch leaks. In these situations, it is recommended to use a premixed coolant designed to prevent this problem. See the chart for appropriate part numbers for the premixed coolant.