CONNECTOR 4C4074 - Caterpillar

Removal Procedure
Start By:Retain the Hydraulic tank oil.Release the hydraulic system pressure.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
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.
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Removed bolts (1) and the washers. Open door (2).
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Disconnect hose assemblies (3) and (4).
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Disconnect harness assemblies (5).
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Disconnect hose assembly (6).
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Remove bolts (8) and combination valve (7).Installation Procedure
Install combination valve (7) in the reverse order of removal.