Cooling System R2.8 CM2220 R101B Page 1-16 Section 1 - Installation by Subsystem Once the fuel filter location on the chassis has been determined and installed, a harness to connect the WIF sensor to the mating engine harness connector will need to be made. The engine harness mating connector is located on the right rear of the engine, near the exhaust gas recirculation (EGR) cooler and valve as shown above. The engine connector harness is 660 mm [26 in] long. The jumper harness must be 18 AWG wire. The engine harness mating connector (1) is a Deutsch DT06-2S- assembly. The WIF sensor connector (2) is a Deutsch DT06-2P-assembly. Pin 1 is water sense, pin 2 is ground.
The length of the harness (3) will be determined by the location of the filter in relation to the engine. A fault code and warning message will be generated if the engine control system does not detect a connected WIF sensor.
Cooling System (387-008) Specifications Coolant capacity.........................................................................................................................................6 liters [1.6 gal] Heat rejection..................................................................................................................................60 Kw [3400 BTU/min] Standard modulating thermostat - range............................................................................82C° to 95C° [180C° to 203°F] Maximum allowed water operating temperature..........................................................................................
107°C [225°F] Minimum recommended water operating temperature...................................................................................71°C [160°F] Minimum recommended pressure cap rating............................................................................................100 kPa [15 psi] Maximum pressure cap rating...................................................................................................................138 kPa [20 psi] Recommended radiator coolant flow Governed power...............................................................................................................................
2.8 L/s [44.4 gpm] Peak torque......................................................................................................................................... 2 L/s [32.5 gpm] General Information The R2.8 CM2220 R101B engine is designed for use with a positive fully deaerating cooling system. A fully deaerating cooling system enables trapped air in the cooling system to be properly purged. The cooling system is comprised of a radiator, deaeration tank, fill line, and vent lines. The pressure cap on the deaeration tank should always be the highest point of the system. All vent lines must continuously run uphill until they connect into the dearation tank.
The deaeration tank must be able to withstand a system pressure of 103 kPa [15 psi]. The minimum recommended pressure cap must be 103 kPa [15 psi]. The system pressure must stay below 138 kPa [20 psi] to maintain integrity of the water pump seal. Therefore, the maximum recommended pressure cap must be 138 kPa [20 psi]. Figure 1 below shows the components of the fully deaerating cooling system. To buy Cummins Parts and Service Manuals, Training Guides, or Tools go to our website at https://store.cummins.com