HANDLE-DOOR 3308272 - Caterpillar

Testing The Radiator And The Cooling System For Leaks
9S-8140 Pressurizing Pump Refer to the following procedure in order to test the radiator and the cooling system for leaks.
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Remove the pressure cap from the radiator.
Make sure that the coolant is over the top of the radiator core.
Put the 9S-8140 Pressurizing Pump on the radiator.
Increase the pressure reading on the gauge to 20 kPa (3 psi) more than the pressure on the pressure cap.
Check the radiator for outside leakage.
Check all connections and hoses for the cooling system for outside leakage.
There is no leakage in the system when the following signs are observed:
There is no outside leakage.
The pressure reading on the gauge does not change after five minutes.
Illustration 5 g00286369
9S-8140 Pressurizing Pump
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand.Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
Test For The Water Temperature Gauge
Table 2
Tools Needed     Quantity    
4C-6500
or
2F-7112     Digital Thermometer
or
Thermometer     1    
Illustration 6 g00580866
Front Of The Right Side Of The Cylinder Head (1) Sending unit for water temperature gaugeCheck the accuracy of the water temperature indicator or water temperature sensor if you find either of the following conditions:
The engine runs at a temperature that is too hot, but a normal temperature is indicated. A loss of coolant is found.
The engine runs at a normal temperature, but a hot temperature is indicated. No loss of coolant is found.Use one of the following thermometers:
The 4C-6500 Digital Thermometer
The 2F-7112 Thermometer A temperature indicator of known accuracy can also be used to make this check.
Making contact with a running engine can cause burns from hot parts and can cause injury from rotating parts.When working on an engine that is running, avoid contact with hot parts and rotating parts.
Start the engine. Run the engine until the temperature reaches the desired range according to the test thermometer. If necessary, place a cover over part of the radiator in order to cause a restriction of the coolant flow. The reading on the water temperature indicator should agree with the test thermometer within the tolerance range of the water temperature indicator.
Illustration 7 g00300300
Water temperature gauge
Table 3
Pointer
Position     Test
Thermometer
°C     Test
Thermometer
°F    
1     65 to 77     150 to 170    
2     99 to 103     210 to 218    Water Temperature Regulator Test
Remove the regulator from the engine.
Heat water in a pan until the temperature is 92 °C (198 °F). Stir the water in the pan. This allows the