HARNESS AS 3734785 - Caterpillar

Drain the Cooling System
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
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, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Note: The engine may be able to auto start. Ensure that the power supply is isolated before any service or repair is performed.
Stop the engine and allow the engine to cool. Ensure that the power supply is isolated so that the engine will not start when the cooling system is drained.
Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap.
Illustration 1 g03572316
Typical example
(1) Location for coolant drain
Open the cooling system drain valves Note: If equipped, be sure to drain the heater and any related supply and return lines.Allow the coolant to drain.
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.
For information regarding the disposal and the recycling of used coolant, consult your Cat dealer or consult Cat Dealer Service Tool Group:Inside USA 1-800-542-TOOL
Inside Illinois 1-800-541-TOOL
Canada 1-800-523-TOOL
International 1-309-578-7372
Flush
Systems Filled with Cat ELC or a Conventional Coolant that Meets the Cat EC-1 Requirements and the Standards of ASTM D6210
Flush the cooling system with clean water in order to remove any debris.
Close the drain valve. Note: Fill the system no faster than 5 L (5.3 qt) per minute.
Fill the cooling system with clean water. Install the cooling system filler cap.
Start and run the engine until the temperature reaches 82 °C (180 °F).
Stop the engine and allow the engine to cool. Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap. Open the drain valve. Allow the water to drain. Flush the cooling system with clean water. Close the drain valve. Refer to the Specifications Manual, SENR3130, "Torque Specifications" for more information on the proper torques. Systems Filled with Cat DEAC, Conventional Coolant which does not Meet the Cat EC-1 Requirements, or Supplemental Coolant Additive (SCA) and Water
Flush the cooling system with clean water in order to remove any debris.
Close the drain valve. Note: Fill the system no faster than 5 L (5.3 qt) per minute.
Fill the cooling system with a mixture of clean water and Cat Fast Acting Cooling System Cleaner.
Choose 1 of the following options.
Add 0.5 L (1