BEARING 1T0766 - Caterpillar

Clean the cooling system before the recommended maintenance interval if the following conditions exist:
The engine overheats frequently.
Foaming is observed.
The oil has entered the cooling system and the coolant is contaminated.
Coolant analysis indicates that the coolant has broken down.Draining the Cooling System
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, PERJ1017, "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.
Stop the engine and allow the engine to cool. Ensure that the engine will not start when the cooling system is drained.For information regarding the disposal and the recycling of used coolant, consult your Cat dealer or consult Caterpillar Dealer Service Tools Group:Outside Illinois 1-800-542-TOOL
Inside Illinois 1-800-541-TOOL
Canada 1-800-523-TOOL
Dispose of used engine coolant properly or recycle. Various methods have been proposed to reclaim used coolant for reuse in engine cooling systems. The full distillation procedure is the only method acceptable by Caterpillar to reclaim the used coolant.
Draining the Jacket Water
Loosen the cooling system filler cap slowly to relieve any pressure. Remove the cooling system filler cap.
Illustration 1 g06243977
G3512H
Illustration 2 g06244012
G3516H and G3520H
Remove the oil cooler plugs (1).
If equipped with a jacket water heater, ensure that the shut off valves are open. Remove jacket water heater drain plugs.
Open pump drain plug (2).Draining the Gearbox Heat Exchanger
Illustration 3 g03554200
Illustration 4 g06325286
Drain SCAC circuit.
Disconnect oil lines (1) and coolant lines (2) from the gearbox heat exchanger.
Drain and dispose of oil and coolant that is left in the gearbox heat exchanger. Follow local guidelines and regulations in the disposal of oil and coolant.
Reinstall oil and coolant lines.Clean the Cooling System
Use of commercially available cooling system cleaners may cause damage to cooling system components. Use only cooling system cleaners that are approved for Caterpillar engines.
After the cooling system has been drained, flush the cooling system with clean water to remove any debris.
Close the cooling system drain valves. Clean the drain plugs and install the drain plugs.
Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.
If the aftercooler circuit has been drained, the vent plug must be opened to allow the aftercooler to fill properly. Failure to do this will cause an air lock resulting in engine damage.
When the separate circuit is filled, be sure to remove the vent plug.
Fill the cooling system with a mixture of clean water and Caterpillar Fast Acting Cooling System Cleaner. Add 0.5 L (1 pt) of cleaner per 15 L (4 US gal) of the cooling system capacity. Install the cooling system filler cap. Install vent plugs (1).
Start the engine. Operate the engine for a minimum of 30 minutes with a coolant temperature of at least 82 °C (180 °F).
Stop the engine and allow the engine to cool. For the jacket water and the separate