HOSE A.5D1817 7S2329 - Caterpillar

Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loose the cap slowly to relieve the pressure.
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 Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Topping off or mixing Cat ELC with other products that do not meet Caterpillar EC-1 specifications reduces the effectiveness of the coolant and shortens coolant service life.Use only Caterpillar products or commercial products that have passed the Caterpillar EC-1 specification for pre-mixed or concentrate coolants. Use only Extender with Cat ELC.Failure to follow these recommendations can result in shortened cooling system component life.
When a Caterpillar Extended Life Coolant (ELC) is used, an Extender must be added to the cooling system.Use a 8T-5296 Coolant Test Kit to check the concentration of the coolant.Reference: For additional information about adding Extender, refer to Operation and Maintenance Manual, SEBU6250, "Caterpillar Machine Fluids Recommendations" or consult your Caterpillar dealer.
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The cooling system pressure cap is located under the engine hood at the rear of the machine.
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Open the engine hood. Slowly loosen cooling system pressure cap (1) in order to relieve any system pressure. Remove the cooling system pressure cap.
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If necessary, open drain valve (3) and drain enough coolant from the radiator in order to allow the addition of the Extender to the cooling system.
Add one bottle of 111-2372 (ELC) Extender to the coolant system.
Maintain the coolant level in sight gauge (2) on the radiator.
Install the cooling system pressure cap. Close the engine hood.