Maintenance - Section 40 OM4064 06/11 Page 40-2 Lubrication and Service COOLING SYSTEM SERVICE Coolant Specifications Check the coolant level sight gauge. If coolant cannot be seen in the sight gauge, add coolant to the system before truck operation. Refer to the procedure below for the proper filling procedure. For ambient temperatures of -32° C (-25° F) and above, use a standard 50/50 anti-freeze-to-water mixture. For arctic climates with ambient temperatures between -32° C (-25° F) and -54° C (-65° F), use a 60/40 anti-freeze-to-water mixture. Radiator Filling Procedure NOTE: Do not use propylene glycol coolant in arctic climates. Only use ethylene glycol coolants.
The cooling system is pressurized due to thermal expansion of coolant. Do not remove the radiator cap while the engine and coolant are hot. Severe burns may result. Unacceptable Practices Use of high-silicate antifreeze. Under concentration or over concentration of Extended Service Additive (SCA). NOTE: If coolant is added using the Wiggins quick fill system, the radiator cap must be removed before adding coolant. Use of antifreezes/coolants that are not fully formulated for extended service intervals. NOTE: Engine coolant must always be visible in the sight gauge before truck operation. Use of sealing additives (stop-leak) in the cooling system. Use of soluble oils in the cooling system. 1.
With the engine and coolant at ambient temperature, remove the radiator cap (2, Figure 40-2). Use of poor-quality water. See the engine manufacturer’s specifications for water quality requirements. 2. Fill the radiator with the proper coolant mixture until coolant is visible in the sight gauge. Use of antifreeze, Extended Service Additive (SCA) or coolant filter(s) that do not meet the engine manufacturer’s specifications. 3. Install the radiator cap. 4. Run the engine for five minutes, then check the coolant level. Use of Treated Water coolant. 5. If coolant is not visible in the sight gauge, repeat Steps 1 - 4.
Any excess coolant will be discharged through the vent hose after the engine reaches normal operating temperature.. Use of coolants with less than 40 percent antifreeze. WHEEL MOTOR SERVICE Due to differences in gear ratio and component evolu- tion/design, wheel motor service intervals may be unit number and/or mine specific. Because of the wide vari- ety of factors involved, it is necessary to consult your area Komatsu representative for all wheel motor ser- vice intervals and instructions. General intervals for oil service and sampling are listed in the interval charts. FIGURE 40-2. COOLING SYSTEM SERVICE 1. Sight Gauge 2. Radiator Cap