PERIODIC SERVICE 68 If it freezes, coolant can damage the cylinders and radiator. If the ambient temperature falls below 0 (32 ) or before a long-term storage, let out cooling water completely, or mix fresh water with long-life coolant and fill the radiator and recovery tank with the mixture. 1. Long-life coolant (hereafter LLC) comes in several types. Use ethylene glycol (EG) type for this engine. 2. Before employing LLC-mixed cooling water, fill the radiator with fresh water and empty it again. Repeat this procedure 2 or 3 times to clean up the inside. 3. Mixing the LLC Put the LLC in cooling water in the percentage (%) for a target temperature.
When mixing, stir it up well, and then fill into the radiator. 4. The procedure for the mixing of water and antifreeze differs according to the make of the antifreeze and the ambient temperature. Refer to SAE J1034 standard, more specifically also to SAE J814c. A When the coolant level drops due to evaporation, add water only to keep the antifreeze mixing ratio less than 50%. In case of leakage, add antifreeze and water in the specified mixing ratio before filling into the radiator. B Replacing Radiator Hose (Water pipes) Replace the hoses and clamps.
(See "Checking Radiator Hose and Clamp" in "EVERY 200 HOURS" in "PERIODIC SERVICE" section.) B Replacing Fuel Hose Consult your local KUBOTA Dealer for this service. B Replacing Brake Master Cylinder (Inner Parts) Consult your local KUBOTA Dealer for this service. A When the antifreeze is mixed with water, the antifreeze mixing ratio must be less than 50%. B Replacing Intake Air Line Consult your local KUBOTA Dealer for this service. B Replacing Engine Breather Hose Consult your local KUBOTA Dealer for this service. * At 1.013 x 10 Pa (760 mmHg) pressure (atmospheric).
A higher boiling point is obtained by using a radiator pressure cap which permits the development of pressure within the cooling system. 5. Adding the LLC (1) Add only water if the mixture reduces in amount by evaporation. (2) If there is a mixture leak, add the LLC of the same manufacturer and type in the same mixture percentage. * Never add any long-life coolant of different manufacturer. (Different brands may have different additive components, and the engine may fail to perform as specified.) 6. When the LLC is mixed, do not employ any radiator cleaning agent. The LLC contains anticorrosive agent.
If mixed with the cleaning agent, sludge may build up, adversely affecting the engine parts. 7. Kubota's genuine long-life coolant has a service life of 2 years. Be sure to change the coolant every 2 years. A The above data represents industry standards that necessitate a minimum glycol content in the concentrated antifreeze. Vol % Anti-freeze Freezing Point Boiling Point* 40 -24 -12 106 222 50 -37 -34 108 226