154011-1700 ZEXEL 9 421 610 621 BOSCH UNION NUT 9421610621 1540111700 5157292090

Inspect gaskets before assembly and replace if worn or damaged. 10. Install lip-type seal (1) in housing with tooling (A) [Driver Group (1P0510)]. Install the seal with the lip of the seal away from the thermostat. 11. Install thermostat (2) in the housing as shown. 12. Install the new gaskets in position between the regulator manifold and the thermostat housing. Install thermostat housing (3).13. Refill the cooling system with clean water mixed with a 6 to 10 percent concentration of Caterpillar Cooling System Cleaner. Install radiator filler cap. A 9-12 gallon (33-47 L) cooling system capacity requires one gallon (3.8 L) of Caterpillar Cooling System Cleaner to accommodate the 6-10 percent concentration.Caterpillar Cooling System Cleaner is available through your Caterpillar dealer.14. Start and run the engine to circulate fluid in the cooling system for 90 minutes. Stop the engine, remove radiator filler cap and cooling system drain plugs.15. Drain the cleaning solution. Flush the cooling system with clean water until draining water is clear. Clean and install all drain plugs and/or close the drain valve.
Fill the cooling system with the coolant solution at 5 U.S. gal (20 L) per minute or less to avoid air locks.
See Refill Capacities chart in this publication for the capacity of your engine's system.16. Add coolant to the system to bring it to the proper level by mixing a solution of acceptable water, Caterpillar Antifreeze or equivalent. If NOT using Caterpillar Antifreeze, add supplemental coolant additive, or if equipped with a coolant additive element, install the appropriate element.When NOT using Caterpillar Antifreeze, add 1 U.S. quart (1 L) of Caterpillar Coolant Additive (Conditioner) for every 8 U.S. gal (30 L) of cooling system capacity OR change maintenance element only (if equipped).Refer to the Cooling System Specifications in this publication for all information regarding acceptable water, antifreeze and supplemental coolant additive requirements or contact your Caterpillar dealer for assistance.17. Start and run the engine with the filler cap removed. Allow the coolant to warm, the thermostat to open and the coolant level to stabilize.18. Add coolant mixture if necessary to bring the coolant to within 1/2inch (13 mm) below the bottom of the fill tube or the correct level on the sight glass, if equipped.
In cold weather, frequently check the specific gravity of the coolant solution to ensure adequate protection.If the engine is to be stored in, or shipped to an area with freezing temperatures, the cooling system must be either protected to the lowest expected outside temperature or drained completely to prevent damage.Always check your cooling system before operating your engine.
19. Check the condition of the filler cap gasket. If the gasket is damaged, discard the old filler cap and install