Maeda MC815C, Operation Manual, Page: 328 / 426

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9.10 EVERY 1000 HOURS MAINTENANCE
Perform this maintenance along with maintenance every 50/100/250/500 hours.
[1] CLEANING ENGINE COOLING SYSTEM
• Coolant will be at elevated temperatures immediately after engine operation. If you
drain the coolant immediately, you may suffer a burn. Always drain the coolant after
the engine has cooled down.
• Do not remove the radiator cap if radiator coolant is hot. Hot water may spout out if
disregarded. Cap removal is allowed when the water drops in temperature. Be sure to
relieve internal pressure by slowly rotating the filler cap before cap removal.
• Do not stand in front of and behind the machine when starting the engine for cooling
system cleaning. Failure to stand aside of the machine may pose a danger in the event
of a sudden movement of the machine.
• Keep antifreeze away from flame. Antifreeze is a flammable solution.
Do not smoke when handling antifreeze.
CAUTION
• Always use tap water (soft water) for coolant. Contact us or our sales service agent if
river water, well water, or water through the small water-supply system is necessarily
substituted for tap water.
• Use a lubricant compliant to one of the SAE J814, SAE J1034, ASTM D3306 or JIS
K2234 standard.
• Replace the coolant every year.
• A mixing ratio of antifreeze is recommended to be controlled by the antifreeze
concentration meter.
Cooling system cleaning and antifreeze replacement should conform to the cycles specified in
the following table.
Antifreeze type Cooling system cleaning and antifreeze replacement
Anti-corrosive all-season type Every 2 years or every 2000 hours, whichever falls first
Stop the machine on a level place and perform cooling system cleaning and antifreeze
replacement.
A mixing ratio of antifreeze varies with temperature. Antifreeze as a volume ratio should be
30–60% to yield anti-corrosive effect.
The mixing ratio between water (soft water) and antifreeze is to be determined with respect to
past minimum temperatures, in accordance with “Mixing ratio between water and antifreeze”
shown below. For actual mixing, set temperature approx. 10 degrees lower than minimum
temperature.
[MIXING RATIO BETWEEN WATER AND ANTIFREEZE]
Min. temperature
(°C)
Mixed quantity (L)
Min. -15 -20 -25
Antifreeze amount 2.0 2.1 2.8
Water amount 4.3 4.2 3.5