GUARD 0779258 - 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 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.
Raise the radiator. Refer to Operation and Maintenance Manual, "Radiator Tilting".
Drain the coolant from the cooling system. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct procedure.
Illustration 1 g01024596
Remove bolts (3). Remove elbow (2) and gasket (1). Discard gasket (1) .
Illustration 2 g01024598
Note: Observe the orientation of the pin for assembly purposes.
Remove water temperature regulator (4) .Installation Procedure
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.
Clean all mating surfaces.
Illustration 3 g00909432
Illustration 4 g01024598
Note: Ensure that the water temperature regulator is seated in the groove. Orient the water temperature regulator with the pin to the top.
Install water temperature regulator (4) .
Illustration 5 g01024596
Install a new gasket (1) and position elbow (2). Install bolts (3). Tighten bolts (3) to a torque of 22 N m (16 lb ft).
Fill the radiator with coolant. Refer to the Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the proper procedure.
Lower the radiator. Refer to Operation and Maintenance Manual, "Radiator Tilting".