Removal Procedure
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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. Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns. Cooling System Conditioner contains alkali. Avoid contact with skin and eyes. |
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| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Drain the coolant from the cooling system. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct procedure.
- Remove screws (1) and bolts (2) .
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| Illustration 1 | g01033322 |
- Remove cover (3) .
- Remove bolts (4) .
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| Illustration 2 | g01033347 |
- Disconnect elbow (5) and remove the gasket. Discard the gasket.
- Remove water temperature regulator (6). Note the upward position of pin (7) for installation purposes.
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| Illustration 3 | g01033348 |
Installation Procedure
| NOTICE |
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Never operate an engine without water temperature regulators in the cooling system. Water temperature regulators help to maintain the engine coolant at the proper operating temperature. Cooling system problems can develop without water temperature regulators. |
- Place water temperature regulator (6) in position. Orient water temperature regulator (6) with pin (7) on the top.
Note: Pin (7) must be facing upward and pin (7) must be free to move. The water temperature regulator will not operate properly if the water temperature regulator is installed incorrectly.
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| Illustration 4 | g01033348 |
Note: The seat and the elbow for the water temperature regulator must be free of gasket material or any other contaminants.
- Place a new gasket and elbow (5) in position.
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| Illustration 5 | g01033347 |
- Install bolts (4). Tighten bolts (4) to a torque of 22 N·m (16 lb ft).
- Place cover (2) in position.
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| Illustration 6 | g01033322 |
- Install bolts (3). Tighten bolts (3) to a torque of 15 ± 3 N·m (11 ± 2 lb ft).
- Install screws (1). Tighten screws (1) to a torque of 6 ± 1 N·m (53 ± 9 lb in).
- Fill the radiator with coolant. Refer to the Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the proper procedure.
- Start the engine and check for leaks.