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2. BASIC MAINTENANCE
[1] OIL HANDLING
• Oil is used under extremely harsh conditions (high temperature, high pressure) in the engine and
working device, which causes the oil to undergo deterioration with operating time.
Always use oil that meets requirements such as grade and operating temperature defined in the
operation manual. Be sure to perform periodic replacement of oil irrespective of contamination in the oil.
• Oil is equivalent to human blood. Exercise due caution when handling oil, keeping impurities (such as
water, metal powder or dust) out of oil. Most of mechanical failures are attributed to intrusion of impurities.
Extra caution is required to prevent impurities from entering the system during machine storage and
lubrication.
• Do not mix oil with other oil of different grade or brand.
• Oil changes must conform to the designated quantity of oil.
Failure to add an adequate quantity can lead to a machine failure.
• In the event that oil used in the working device turns cloudy, potential intrusion of moisture or air into the
oil may be considered. Contact us or our sales service agency.
• When replacing oil, always replace the relevant filter as well.
• Do not use any other hydraulic oil that is not recommended by us. Failure to follow the instruction may
cause the filters to get clogged. A small amount of oil remaining in piping and cylinders does not cause
problems even if mixed with other oil.
[2] FUEL HANDLING
Always use diesel oil for the fuel.
To ensure good fuel consumption characteristics and exhaust gas characteristics, the engine
mounted on this machine uses an electronically controlled high-pressure fuel injection device.
This device requires high precision parts and lubrication, so if low viscosity fuel with low
lubricating ability is used, the durability may reduce considerably.
• The fuel pump is precision equipment that becomes inoperative if fuel containing moisture or impurities
is used. Extra caution is required to prevent impurities from entering the system during machine storage
and lubrication.
• Do not remove the strainer when replenishing fuel.
• Always use fuel that meets requirements such as grade and operating temperature defined in the
operation manual.
• Ensure that the fuel tank is filled up after finishing daily work to prevent condensation of the humid air
inside the fuel tank resulting in intrusion of moisture.
• Drain deposits and water out of the fuel tank before starting the engine or approximately 10 minutes after
fuel replenishment.
• The air should be released from the circuit when the machine runs out of fuel or fuel filter replacement is
performed.
• Clean the tank and fuel system if any foreign objects enter the fuel tank.
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