MODULE AR-CLEAN EMISSIONS 3628782 - Caterpillar

At operating temperature, the engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot water or steam. Any contact can cause severe burns. Looks at the sight gauge to check the coolant level. The coolant level should be in the green range. If necessary, remove the fill cap only after the engine has been stopped and the cap is cool enough to remove with your bare hand. Remove the cooling system fill cap slowly to relieve pressure. Cooling system condition contains alkali that can cause personal injury. Avoid contact with the skin and eyes and do not drink. Allow cooling system components to cool before draining.
1. Drain a portion of the coolant from the radiator. The radiator coolant need only to be drained to a level belw of the heater control valve hose connection. 2. Loosen set screw (1) and remove knob (2). 3. Remove two screws (3), plate (4), and filler (5). 4. Loosen clamps (7) and (8), and disconnect hoses (6) and (9). 5. Remove two bolts (10) and washers.6. Remove heater control valve assembly (11) from the machine. 7. Loosen screw (13) and remove rod (12).8. Loosen two clamps (14) and remove two hoses (15).9. Remove four screws (17) and bracket (16) from the heater control valve. Install in reverse order.