PISTON GP 1540865 - Caterpillar

Checking the Filler Cap
Table 3
Required Tools    
Part Number    Part Name    Qty    
9S-8140     Pressurizing Pump     1    One cause for a pressure loss in the cooling system can be a faulty seal on the radiator pressure cap.
Illustration 9 g01328299
Typical schematic of filler cap (1) Sealing surface between the pressure cap and the radiator
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.
To check for the amount of pressure that opens the filler cap, use the following procedure:
After the engine cools, carefully loosen the filler cap. Slowly release the pressure from the cooling system. Then, remove the filler cap.
Inspect the pressure cap carefully. Look for damage to the seal. Look for damage to the surface that seals. Remove any debris on the cap, the seal, or the sealing surface.Carefully inspect the filler cap. Look for any damage to the seals and to the sealing surface. Inspect the following components for any foreign substances:
Filler cap
Seal
Surface for sealRemove any deposits that are found on these items, and remove any material that is found on these items.
Install the pressure cap on the 9S-8140 Pressurizing Pump .
Observe the exact pressure that opens the filler cap.
Compare the pressure to the pressure rating that is found on the top of the filler cap.
If the filler cap is damaged, replace the filler cap.Testing The Radiator And Cooling System For Leaks
Table 4
Required Tools    
Part Number    Part Name    Qty    
9S-8140     Pressurizing Pump     1    Use the following procedure to test the radiator and the cooling system for leaks.
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.
When the engine has cooled, loosen the filler cap to the first stop. Allow the pressure to release from the cooling system. Then remove the filler cap.
Make sure that the coolant covers the top of the radiator core.
Put the 9S-8140 Pressurizing Pump onto the radiator.
Use the pressurizing pump to increase the pressure to an amount of 20 kPa (3 psi) more than the operating pressure of the filler cap.
Check the radiator for leakage on the outside.
Check all connections and hoses of the cooling system for leaks.The radiator and the cooling system do not have leakage if all of the following conditions exist:
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