COUPLING GP-FLEXIBLE 3202929 - Caterpillar

href="https://avspare.com/spare/caterpillar/1u7298/">1U-7298 Coolant/Battery Tester to ensure adequate freeze protection. The testers are identical except for the temperature scale. The testers give immediate, accurate readings. The testers can be used for coolants that contain ethylene or propylene glycol.Making the Correct Antifreeze Mixtures
Adding pure antifreeze as a makeup solution for the cooling system top-off is an unacceptable practice. Adding pure antifreeze increases the concentration of antifreeze in the cooling system. This increases the concentration of the dissolved solids and the undissolved chemical inhibitors in the cooling system. Add the coolant/water mixture to the same freeze protection as your cooling system. The following chart helps with determining the concentration of antifreeze to use. Refer to Operation and Maintenance Manual, "General Coolant Information".
Table 2
Antifreeze Concentrations
Temperature Concentration
Protection to −15 °C (5 °F) 30% antifreeze and 70% water
Protection to −23 °C (−10 °F) 40% antifreeze and 60% water
Protection to −37 °C (−34 °F) 50% antifreeze and 50% water
Protection to −51 °C (−60 °F) 60% antifreeze and 40% water 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 exchanger
To 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.
The opening pressure should be 100 kPa (14.5psi).
If the pressure cap is damaged, replace the pressure cap.Testing The Expansion Tank And Cooling System For Leaks
Table 4
Tools Needed
Part Number Part Name Quantity
9S-8140 Pressurizing Pump 1 Use the following procedure 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 expansion tank.
Ensure that the expansion tank is full of coolant.
Install the 9S-8140 Pressurizing Pump onto the expansion tank.
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:
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