28

Maintenance Section

Cooling System Specifications

Table 15

Example Of The Equation For Adding ELC

Extender To ELC

Total Volume

Multiplication

Amount of ELC

of the Cooling

Factor

Extender that is

System (V)

 

Required (X)

 

 

 

946 L

× 0.02

19 L

(250 US gal)

 

(5 US gal)

 

 

 

 

 

 

NOTICE

When using Caterpillar ELC, do not use standard SCA’s or SCA filters. To avoid SCA contamination of an ELC system, remove the SCA filter base and plug off or by-pass the coolant lines.

ELC Cooling System Cleaning

Note: If the cooling system is already using ELC, cleaning agents are not required to be used at the specified coolant change interval. Cleaning agents are only required if the system has been contaminated by the addition of some other type of coolant or by cooling system damage.

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 in order to remove the ethylene glycol and the water. The ethylene glycol and the water can be reused. Consult your Caterpillar dealer for more information.

After the cooling system is drained and after the cooling system is refilled, operate the engine while the cooling system filler cap is removed. Operate the engine until the coolant level 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.

Changing to Caterpillar ELC

To change from heavy-duty coolant/antifreeze to the Caterpillar ELC, perform the following steps:

NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, test- ing, 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.

1.Drain the coolant into a suitable container.

2.Dispose of the coolant according to local regulations.

NOTICE

Do not leave an empty SCA filter on an ELC system.

The filter housing may corrode and leak causing an engine failure.

Remove the SCA filter base and plug off or by-pass the coolant lines.

3.Remove the empty SCA filter and remove the filter base. Plug the coolant lines or bypass the coolant lines.

4.Flush the system with clean water in order to remove any debris.

5.Use Caterpillar cleaner to clean the system. Follow the instruction on the label.

6.Drain the cleaner into a suitable container. Flush the cooling system with clean water.

7.Fill the cooling system with clean water and operate the engine until the engine is warmed to 49￿ to 66￿C (120￿ to 150￿F).

NOTICE

Improper or incomplete rinsing of the cooling system can result in damage to copper and other metal com- ponents.

To avoid damage to the cooling system, make sure to completely flush the cooling system with clear wa- ter. Continue to flush the system until all signs of the cleaning agent are gone.