Maeda CC423S-1, Operation Manual

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[2] CLEANING INSIDE ENGINE COOLING SYSTEM
•
Coolant temperature is high immediately after stopping the engine and pressure is
accumulated in the radiator. Removing the cap in this state for discharging water may cause
burns. Allow it to cool down, and then slowly turn the cap to relieve the pressure.
• Start and clean the engine. Before standing up from the operator’s seat or leaving it, set the
lock lever to LOCK.
• For starting the engine, refer to sections “Operation 3.1 Inspecting and Adjusting Before
Starting Engine” and “Operation 3.2 Starting Engine”.
• While cleaning, the engine is kept running, and thus it is dangerous to stay in the rear of the
engine. While running the engine never enter the rear section of the machine.
Stop the machine on a level place and perform cooling system cleaning or coolant replacement.
Cooling system cleaning and coolant replacement should conform to the cycles specified in the following
table.
Coolant type Cooling system cleaning and replacement
Super coolant AF-NAC Every 2 years (in fall) or every 2000 hours, whichever falls first
While the mixing proportion of coolant varies with temperature, a volumetric proportion of 30% at a
minimum is required.
Even in areas where anti-freezing is not needed, use the super coolant at a minimum proportion of 30% to
prevent corrosion of cooling system.
The mixing proportion of water and coolant is determined with respect to past minimum temperatures, in
accordance with “Mixing proportion of water and coolant” shown below. For actual mixing, set
temperature approx. 10°C lower than minimum temperature.
Freezing temperature of 100% undiluted super coolant is -15°C. Be careful not to store the undiluted
super coolant below -15°C.
TABLE OF MIXING PROPORTION OF WATER AND SUPER COOLANT
Min. temperature
(°C)
Mixed quantity (L)
-10 or
more
-15 -20 -25 -30
Super coolant quantity 1.7 2.0 2.3 2.5 2.8
Water amount 3.8 3.5 3.2 3.0 2.7
• Since the undiluted super coolant is flammable, be cautious of fire.
• The super coolant is toxic. When removing the drain plug, be careful not to get exposed to
splashes of the super coolant solution. If it gets in the eyes, wash immediately and
thoroughly with water and seek medical attention.
• The disposal of cooling water added with the super coolant discharged when replacing the
cooling water and repairing the radiator should be consigned to a specialized subcontractor,
or contact us or our sales service agency. Since the super coolant is toxic, never drain it into
drainage or sprinkle it on the ground.