HOSE AS 3383753 - Caterpillar

Start By:
Remove the hood. Refer to Disassembly and Assembly, SENR8323, "Hood and Dust Ejector - Remove".
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand.Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.
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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Note: Mark all components for correct installation. When you disconnect the lines, cap the lines and plug the openings in order to keep the system clean.
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Remove filter (1).
Remove four bolts (2) and remove plate (3).
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Close the coolant valves to the heater core. Both coolant lines are connected to valves on the left side of the engine by the water pump.
Disconnect tube (4) from the heater core.
Loosen clamp (5) and disconnect hose (6).
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Remove two bolts (7) (one on each side of the heater core).
Remove two bolts (8).
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Remove thermostat (9).
Remove two bolts (10) and remove plate (11).
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Remove heater core (12) from the machine.