3H6-07223-0 Tohatsu COTTER

Use only Caterpillar products or commercial products that have passed Caterpillar's EC-1 specification for pre-mixed or concentrated coolants. Use only Caterpillar Extender with Extended Life Coolant. 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.
In order to maintain the correct balance between the antifreeze and the additives, you must maintain the recommended 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.
Do not use a conventional coolant to top-off a cooling system that is filled with Extended Life Coolant (ELC).Do not use standard supplemental coolant additive (SCA). Only use ELC Extender in cooling systems that are filled with ELC.
During daily 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 the Caterpillar EC-1 specification. Before the engine is exposed to freezing temperatures, check the freeze protection (glycol concentration) of the coolant with the 1U-7298 Coolant/Battery Tester (Celsius) or with the 1U-7297 Coolant/Battery Tester (Fahrenheit). Use ELC Concentrate to adjust the glycol concentration, if necessary. ELC Concentrate can be used to lower the freezing point to −51 °C (−60 °F).Caterpillar ELC Extender
Caterpillar ELC Extender is added to the cooling system halfway through the ELC service life. Treat the cooling system with ELC Extender at three years or one half of the coolant service life. Refer to the specific engine's Operation and Maintenance Manual, "Maintenance Interval Schedule" (Maintenance Section).Containers of several sizes are available. Consult your Caterpillar dealer for the part numbers.Adding ELC Extender
The amount of ELC Extender that is required depends on the capacity of the cooling system. Use the equation that is in Table 1 in order to determine the proper amount of ELC Extender that is required.
Table 1
Equation For Adding ELC Extender To ELC
V × 0.02 = X
V is the total volume of the cooling system.
X is the amount of ELC Extender that is required. Table 2 is an example for using the equation that is in Table 1.
Table 2
Example Of The Equation For Adding ELC Extender To ELC
Total Volume of the Cooling System (V) Factor for Multiplication Amount of ELC Extender that is Required (X)
946 L
(250 US gal) × 0.02 19 L
(5 US gal) 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.The 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 the cooling system is drained and 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:
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Drain the coolant into a suitable container. Dispose of the coolant according to local regulations.
Flush the system with clean water in order to remove any debris.
Clean the cooling system with Caterpillar Cooling System Cleaner. Follow the instructions on the label.
Drain the cleaner into a suitable container. Flush the cooling system with clean water.
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).
Improper or incomplete rinsing of the cooling system can result in damage to copper and other metal components.To avoid damage to the cooling system, make sure to completely flush the cooling system with clear water. Continue to flush the system until all signs of the cleaning agent are gone.
Drain the water into a suitable container. Flush the cooling system with clean water. Note: The cooling system cleaner must be thoroughly flushed from the cooling system. Cooling system cleaner that is left in the system will contaminate the coolant. The cleaner may also corrode the cooling system.
Repeat Steps 5 and 6 until the cooling system is completely clean.
Fill the cooling system with Caterpillar Premixed ELC.
Attach Special Publication, PEEP5027, "Label" to the filler of the cooling system in order to indicate the use of Caterpillar ELC. Note: Clean water is the only flushing agent that is required when the ELC is drained from the cooling system.Contamination of the ELC Cooling System
Mixing ELC with other products reduces the effectiveness of the ELC and shortens the ELC service life. Use only Caterpillar products or commercial products that have passed the Caterpillar EC-1 specification for premixed or concentrate coolants. Use only Caterpillar ELC Extender with Caterpillar ELC. Failure to follow these recommendations can result in shortened cooling system component life.
ELC cooling systems can withstand contamination to a maximum of ten percent of conventional heavy-duty coolant/antifreeze or SCA. If the contamination exceeds ten percent of the total system capacity, perform ONE of the following procedures:
Drain the cooling system into a su