Cooling System Cleaning Kelas11 perawatan engine dan unit alat berat 6 1398

154 • Foaming is observed. Use Caterpillar Fast Acting Cooling System Cleaner to clean harmful scale and corrosion. This cleaner dissolves the following pollutants: mineral scale, corrosion products, light oil contamination and sludge. Caterpillar Fast Acting Cooling System Cleaner is available from your Caterpillar dealer in the quantities that are listed below. Table 19 Caterpillar Fast Acting Cooling System Cleaner Part Number Size 4C-4609 .47 L .5 qt 4C-4610 .95 L 1 qt 4C-4611 3.8 L 1 US gal 4C-4612 19 L 5 US gal 4C-4613 208.5 L 55 US gal For proper use, follow the instructions that are listed on the product label.

2. SOS Coolant Analysis

Testing the coolant can be done at your Caterpillar dealer. Caterpillar SOS Coolant Analysis is the best way to monitor the condition of your coolant and your cooling system. SOS Coolant Analysis is a program that is based on periodic samples. The 8T-5296 Test Kit can be used to evaluate the concentration of SCA. However, the following modifications must be made in STEP 3 and in STEP 5. STEP 3- Add tap water to the vial up to the 20 ml mark. STEP 5- When the defined procedure is used, a concentration of 6 percent to 8 percent will yield between 20 drops and 27 drops. If the number of drops is below 20 drops, the concentration of SCA is low. If the number of drops is above 27 drops, the concentration of SCA is high. Make the appropriate adjustments to the concentration of SCA. If the concentration of SCA is above the maximum of 8 percent, drain some of the coolant mixture. Refill the system with acceptable water. Retest the concentration.

3. Extended Life Coolant ELC Cooling System Maintenance

Mixing Extended Life Coolant with other products reduces the Extended Life Coolant service life. Failure to follow the recommendations can reduce cooling system components life unless appropriate corrective action is performed. 155 For the correct balance of antifreeze and of additives, proper care should be taken in order to maintain the concentration of Extended Life Coolant ELC. Lowering the proportion of antifreeze lowers the proportion of additive. This will lower the ability of the coolant to protect the system from pitting, from cavitation, from erosion, and from deposits.

4. Proper additions to the Extended Life Coolant

Note: Do not add ELC Concentrate as a makeup solution for a routine cooling system top-off. The addition of the concentrated Extended Life Coolant will increase the concentration of glycol in the cooling system. During the normal maintenance, use the premixed ELC as a cooling system top-off. This will bring the coolant up to the proper level. Use ELC or use a coolant that meets Caterpillar specifications EC-1. If the proper coolant is not available, use distilled water or use deionized water. Check the glycol level of the coolant system with the 1U - 7298 Coolant Tester Group °C or with the 1U-7297 Coolant Tester Group °F. Use ELC Concentrate to restore the proper glycol concentration in the coolant system. This should be done before the engine is exposed to freezing temperatures. NOTICE Do not use a conventional coolant to top-off a cooling system using Extended Life Coolant.

5. Extended Life Coolant Cooling System Cleaning

Note: No cleaning agents need to be used when a cooling system that is already using ELC is cleaned. Clean water is the only cleaning agent that is required when ELC is drained from the cooling system. ELC can be recycled. The drained coolant mixture can be distilled. The distillation process can remove the ethylene glycol and the water. Consult your Caterpillar dealer for more information. After you drain the cooling system and after you refill the cooling system, operate the engine while the radiator filler cap is removed. Operate the engine until the coolant reaches the normal operating temperature and until the coolant level stabilizes. As needed, add the coolant mixture in order to fill the system to the proper level.

6. Cleaning the Heavy-Duty Cooling System

Caterpillar Cooling System Cleaners are designed to clean the system of harmful scale and of corrosion. Caterpillar Cleaners dissolve mineral scale, corrosion products, light oil contamination, and sludge. For the recommended service interval, refer to the Operation and Maintenance Manual, Maintenance Interval Schedule for your machine.

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