Service Registration

◆ Coolant Information

NOTICE:

Mitsubishi Caterpillar Forklift Europe Inc. recommends that the coolant mix contain 50% commercially available automotive antifreeze, and 50% water.

To reduce the risk of damage to your engine, DO NOT add coolant to an overheated engine. Allow the engine to cool first. Dowtherm 209 full-fill coolant will lower the water pump cavitation temperature and boiling point. These lowered temperatures will cause overheating at a lower ambient temperature than an ethylene glycol and water mix. If Dowtherm is used, follow the instructions provided and use only the inhibitor package recommended by the supplier.

If the lift truck is to be stored in, or shipped to, an area with freezing temperatures, the cooling system must be protected to the lowest expected outside (ambient) temperature. The engine cooling system is protected with a commercially available automotive antifreeze when shipped from the factory. In cold weather, check the specific gravity of the coolant frequently to ensure adequate protection. Clean the cooling system if it is contaminated, the engine overheats or foaming is observed in the radiator. Old coolant should be drained, the system cleaned and new coolant added—as recommended—using a commercially available automotive antifreeze. Filling at over 20 liters per minute could cause air pockets in the cooling system. After draining and refilling the cooling system, run the engine with the radiator cap off. Run it until the coolant reaches its normal operating temperatures and the coolant level stabilizes. Add coolant as necessary to fill the system to the proper level. Operate with a thermostat in the cooling system all year round. Cooling system problems could arise without a thermostat.

• Coolant Water

Hard water, or water with high levels of calcium and magnesium ions, encourages the formation of insoluble chemical compounds by combining with cooling system additives such as silicates and phosphates. The tendency of silicates and phosphates to precipitate out-of-solution increases with increasing water hardness. Hard water, or water with high levels of calcium and magnesium ions, encourages the formation of insoluble chemicals, especially after a number of heating and cooling cycles. Mitsubishi Caterpillar Forklift Europe inc. recommends the use of distilled water or deionized water to reduce the potential and severity of chemical insolubility.

ppm = parts per million

Using water that meets the minimum acceptable water requirement may not prevent dropout of these chemical compounds completely but should control the dropout rate at acceptable levels.

Acceptable Water

Water Content Limits (ppm)

Chlorides (CI) 50 ppm (maximum)

Sulfates (SO4) 50 ppm (maximum)

Total Hardness 80 mg/l Total Solids 250 ppm (maximum) pH 6.0 to 8.0