SPOOL GP-CONTROL VALVE 4165351 - Caterpillar

D9L Tractors;
916, 926, 936 Wheel Loaders;
IT12, IT18, IT28 Toolcarriers;
651E, 657E TractorsDescription of Change: The air conditioner groups, on the models listed above, now use a different means of regulating the air temperature in the cab. The new air conditioner groups do not have a variable temperature switch that can be adjusted by the operator. Instead, there is a fixed temperature switch that turns off the compressor clutch if the evaporator core temperature drops to +1°C (+34°F). This prevents ice from forming on the evaporator core. The cab temperature is regulated by adjusting the coolant flow through the heater core. Charging and testing procedures for the new air conditioning systems are the same as for the former systems.Adaptable As: The new air conditioner controls are in effect on the machines listed above. The new air conditioner controls can not be retrofitted to any air conditioning unit with a variable temperature switch.