DRAWBAR AS 3T2817 - Caterpillar

Checking the Filler Cap
Table 3
Tools Needed    
Part Number     Part Name     Quantity    
9S-8140     Pressurizing Pump     1    One cause for a pressure loss in the cooling system can be a damaged seal on the pressure cap.
Illustration 6 g01430877
Typical schematic of pressure cap (1) Sealing surface of both pressure cap and the heat exchangerTo check for the amount of pressure that opens the pressure cap, use the following procedure:
After the engine cools, carefully loosen the pressure cap. Slowly release the pressure from the cooling system. Then, remove the pressure cap.Carefully inspect the pressure cap. Look for any damage to the seals and to the sealing surface. Inspect the following components for any foreign substances:
Pressure cap
Seal
Surface for sealRemove any deposits that are found on these items.
Install the pressure cap on the 9S-8140 Pressurizing Pump .
Look at the gauge for the exact pressure that opens the pressure cap.
Compare the gauge's reading with the opening pressure that is listed on the pressure cap.
If the pressure cap is damaged, replace the pressure cap.Testing The Heat Exchanger And Cooling System For Leaks
Table 4
Tools Needed    
Part Number     Part Name     Quantity    
9S-8140     Pressurizing Pump     1    Use the following procedure in order to check the cooling system for leaks:
After the engine is cool, loosen the pressure cap slowly and allow pressure out of the cooling system. Then remove the pressure cap from the heat exchanger.
Ensure that the heat exchanger is full of coolant.
Install the 9S-8140 Pressurizing Pump onto the heat exchanger.
Take the pressure reading on the gauge to 20 kPa (3 psi) more than the pressure on the pressure cap. The pressure on a typical pressure cap is 48 kPa (7 psi) to 104 kPa (15 psi).
Check the heat exchanger for leakage on the outside.
Check all connection points for leakage, and check the hoses for leakage.The cooling system does not have leakage only if the following conditions exist:.
You do NOT observe any outside leakage.
The reading remains steady after five minutes.Note: Check the engine oil for evidence of coolant leakage.The inside of the engine cooling system has leakage only if the following conditions exist:
The reading on the gauge goes down.
You do NOT observe any outside leakage.
Evidence of coolant on the engine oil gauge.Make any repairs, as required.Test For The Water Temperature Gauge
Table 5
Tools Needed    
Part Number     Part Name     Quantity    
4C-6500
or
2F-7112     Digital Thermometer
or
Thermometer     1    
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.
Check the accuracy of the coolant temperature indicator or coolant 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