HOSE AS 3817774 - Caterpillar

Illustration 2 g00775179
(3) Drain plug in the elbow before the water pump on the front of the engine Note: If the engine is equipped with a jacket water heater, a water line will be installed in the location of drain plug (2).
Open the cooling system drain valves (if equipped). If the cooling system is not equipped with drain valves, remove drain plugs (1), (2), and (3). Drain the coolant from the bottom of the jacket water heater (if equipped).Draining the Separate Circuit
Illustration 3 g00760199
(1) Vent plug on the aftercooler A heat exchanger or a radiator is provided by the customer for the separate circuit aftercooler. Each side of the aftercooler has vent plug (1). Remove the vent plugs. Remove the cooling system filler cap and drain the water from the heat exchanger or the radiator.Clean the Cooling System
After the cooling system has been drained, flush the cooling system with clean water in order to remove any debris.
Close the cooling system drain valves (if