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American-Lincoln
®
SC7740
CHECKING WATER LEVEL
1. The coolant level should be checked on a daily basis. Following a cleaning operation, allow engine to
remain in unloaded idle for 5 minutes, then turn engine off and allow to completely cool down (no less than
30 minutes). Using a rag, twist radiator cap to first position to make sure any excess pressure escapes.
Remove the radiator cap (1) and check to see that the cooling water level is just below the port.
2. If low, add clean water or antifreeze/water mix.
WARNING
Be sure to close the radiator cap securely.
If the cap is loose or improperly closed, water may leak out and the engine could overheat.
DRAINING AND CLEANING THE RADIATOR
1.
Prepare a bucket. To drain completely, open the drain cock (1) and radiator cap. Use fresh, clean
water to fill the radiator. (KUBOTA Scale Inhibitor No. 11 prevents scale formation in the cooling water.
Scale buildup in either hard or soft water sharply reduces cooling efficiency. The scale inhibitor is
effective for 3 months, so the water must be changed every 3 months.)
2.
The water jacket (radiator interior) should be cleaned every 400 service hours; when adding antifreeze; or
when changing from water containing antifreeze to pure water. When cleaning the system, KUBOTA
Detergent No. 20 is recommended to effectively wash away the rust buildup.
WARNING
Never remove the radiator cap under any conditions while engine is operating. Failure to follow these instruc-
tions could result in personal injury and/or damage to the cooling system. To avoid having scalding hot coolant or
steam blow out of the radiator, use extreme care when removing the cap from a hot radiator. If possible, wait
until the engine has cooled, then wrap a thick cloth around the radiator cap and turn it slowly to the first stop.
STEP BACK
while the pressure is released from the cooling system. When you are sure all the pressure has been released,
press down on the cap with a cloth, turn and remove. Do not add coolant to an engine that has overheated until
the engine cools. Adding coolant to an extremely hot engine can result in a cracked block or cylinder head.
NOTE
Do not use antifreeze during hot weather to maintain engine performance since the boiling point of coolant rises.
Do not use scale inhibitor and antifreeze at the same time. When using antifreeze, it should be combined with
water in the proportions recommended by the antifreeze manufacturer.
Check radiator clamps for tightness and hoses for leaks, swells, cracks or hardness at 200 operation hours or
every six months. Replace every 2 years or sooner if damaged.
GENERAL MACHINE MAINTENANCE - Cont.
