FITTING AS 4264046 - Caterpillar

Engine hood and engine hood parts can be hot while engine is running or immediately after engine shutdown. Hot parts or hot components can cause burns or personal injury. Do not allow these parts to contact your skin, when engine is running or immediately after engine shutdown. Use protective clothing or protective equipment to protect your skin.
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.
Unlatch the engine hood and raise the engine hood.
Illustration 1 g02153074
(1) "FULL" level
(2) "LOW" level
Check the coolant level of the coolant reservoir when the engine is cold. Maintain the coolant level between the "FULL" mark and the "LOW" mark. If the coolant reservoir is empty, follow Steps 2.a through 2.g.
Illustration 2 g02153073
Slowly loosen the cooling system pressure cap in order to relieve system pressure. Remove the pressure cap. Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.
Add the appropriate coolant solution to the cooling system. Refer to the following topics:
Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations"
Operation and Maintenance Manual, "Capacities (Refill)"
Start the engine. Operate the engine without the cooling system pressure cap until the water temperature regulator opens and the coolant level stabilizes.
Inspect the condition of the o-ring on the pressure cap. If the o-ring is damaged, replace the pressure cap.
Install the cooling system pressure cap.
Stop the engine.
Close the engine hood and latch the engine hood.