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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 cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure 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 Coolant Additive contains alkali. Avoid contact with skin and eyes. |
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Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. |
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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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. |
- Drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
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Illustration 1 g01453306 - Remove bolts (2) from water temperature regulator housing (1).
- Remove water temperature regulator housing (1). Remove seal (3). Remove water temperature regulator (5).
- Remove lip seal (4) from water temperature regulator housing (1).
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 221-8647 | Seal Installer | 1 |
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Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. |
- Clean the mating surfaces of the water temperature regulator housing.
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Illustration 2 g01453306 - Use Tooling (A) and install lip seal (4) into water temperature regulator housing (1).
- Install water temperature regulator (5). Install a new seal (3) into water temperature regulator housing (1).
- Position water temperature regulator housing (1). Install bolts (2).
- Fill the cooling system with coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".