Cooling System 78 UENR0623-02 2. Heat water in a pan until the temperature of the water is equal to the fully open temperature of the water temperature regulator. Refer to Specifications, “Water Temperature Regulator” for the fully open temperature of the water temperature regulator. Stir the water in the pan. This will distribute the temperature throughout the pan. Personal injury can result from air pressure. Personal injury can result without following prop- er procedure. When using pressure air, wear a protective face shield and protective clothing. Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes. 3.
Hang the water temperature regulator in the pan of water. The water temperature regulator must be below the surface of the water. The water temperature regulator must be away from the sides and the bottom of the pan. 4. Inspect the oil cooler (1) for cracks and dents. Replace the oil cooler (1) if cracks or dents exist. Ensure that no restrictions for the flow of lubricating oil exist in the oil cooler (1). Dry the oil cooler (1) with low-pressure air. Flush the inside of the oil cooler (1) with clean lubricating oil. 4. Keep the water at the correct temperature for ten minutes. 5. After ten minutes, remove the water temperature regulator.
Immediately measure the opening of the water temperature regulator. Refer to Specifications, “Water Temperature Regulator” for the minimum opening distance of the water temperature regulator at the fully open temperature. If the distance is less than the amount listed in the manual, replace the water temperature regulator. 5. Refer to Disassembly and Assembly, “Engine Oil Cooler - Install” for installation of the engine oil cooler. 6. Ensure that the lubrication and the cooling system of the engine is filled to the correct level. Operate the engine. Note: Refer to Operation and Maintenance Manual, “Refill Capacities” for additional information. Check for oil or coolant leakage.
i04338356 Water Pump - Inspect i02414647 Water Temperature Regulator - Test 1. Inspect the water pump for leaks at vent hole. The water pump seal is lubricated by coolant in the cooling system. A normal condition is for a small amount of leakage to occur as the engine cools down and the parts contract. 2. Refer to Disassembly and Assembly, “Water Pump - Remove ” and Disassembly and Assembly, “Water Pump - Install” for the correct procedures to remove and install the water pump. Personal injury can result from escaping fluid under pressure. If a pressure indication is shown on the indicator, push the release valve in order to relieve pres- sure before removing any hose from the radiator. 3.
Inspect the water pump shaft for unusual noise, excessive looseness and/or vibration of the bearings. 1. Remove the water temperature regulator from the engine. Refer to Disassembly and Assembly Manual, “Water Temperature Regulator - Remove and Install”.