14. COLD WEATHER OPERATION 14.1 PRECAUTIONS FOR LOW TEMPERATURE If the temperature becomes low, it becomes difficult to start the engine, and the coolant may freeze, so do as follows. 14.1.1 FUEL AND LUBRICANTS Change to fuel and oil with low viscosity for all components. For details of the specified viscosity, see “20. USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERA- TURE”. 14.1.2 COOLANT Antifreeze is flammable, so keep it away from flames. Never smoke when handling antifreeze Antifreeze is added to the coolant to prevent the water from freezing when the machine is not being used. c NOTICE Never use methanol, ethanol, or propanol-based antifreeze.
For details of the timing for changing the coolant and the propor- tions for mixing antifreeze with the coolant, see “24.2 WHEN REQUIRED”. REMARK Komatsu genuine Super Coolant (AF-ACL) is added to the cool- ing water. Adjust the density according to the ambient temperature at the place of operation. For details, see “24.2 WHEN REQUIRED”. Use a Permanent Antifreeze (ethylene glycol mixed with corro- sion inhibitor, antifoam agent, etc.) meeting the standard require- ments as shown below. With permanent antifreeze, no change of coolant is required for a year. If it is doubtful that an available antifreeze meets the standard requirements, ask the supplier of that antifreeze for information.
Standard requirements for permanent antifreeze. l SAE _........_............................................................................... J1034 l FEDERAL STANDARD . . . . . . . . . . ..__.................................... O-A-548D 2-45