TRANSFORMER AS 1W9143 - Caterpillar

Removal Procedure
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.
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 Dealer Service Tool Catalog" 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 into a suitable container. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
Open the access door.
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Disconnect hose assembly (1).
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Remove bolts (2). Remove housing (3). Disconnect housing (3) from tube (4).
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Remove O-ring seal (5). Remove water temperature regulator (6). Installation Procedure
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Install O-ring seal (5). Install water temperature regulator (6).
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Position housing (3). Connect housing (3) onto tube (4). Install bolts (2).
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Connect hose assembly (1).
Close the engine access door.
Fill the cooling system with coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".