PRECAUTIONS FOR SCR ASSEMBLY
Be careful for the high temperature parts when performing inspection and maintenance. Even after the engine
stops the parts around SCR device may be at high temperature.
DUSTY JOBSITES
When working at dusty jobsites, observe the following.
• Clean the radiator fins and other parts of the heat exchange equipment more frequently, and take care not
to let the fins become clogged.
• Replace the fuel filter more frequently.
• Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
• When checking and replacing the oil or filters, move the machine to a place where there is no dust and take
care to prevent dust from entering the system.
AVOID MIXING OIL
Never mix different brand or grade of oil. If a different brand or grade of oil has to be added, drain the old oil and
replace all the oil with the new brand or grade of oil.
LOCK INSPECTION COVERS
Lock inspection cover securely into position with the lock bar, etc. If inspection or maintenance is performed with
inspection cover not locked in position, there is a danger that it may be suddenly shut by the wind and cause
personal injury.
PRECAUTIONS FOR OPENING AND CLOSING ENGINE SIDE COVER
• When standing on track to open the engine side cover,
adopt a standing position, hold the side cover with both
thumbs, and open it slowly with your other fingers.
• Fully close or open the engine side cover until it is locked
and then open or close the cab door.
BLEED AIR FROM HYDRAULIC CIRCUIT
When hydraulic equipment is repaired or replaced, or the hydraulic piping is disconnected, the air must be bled
from the circuit. For bleeding air, see “METHOD FOR BLEEDING AIR FROM HYDRAULIC CIRCUIT (4-43)”.
PRECAUTIONS WHEN INSTALLING HYDRAULIC HOSES
• When removing parts at locations where there are O-rings or gasket seals, clean the mounting surface, and
replace them with new parts.
When doing this, be careful not to forget to assemble O-rings and gaskets.
• When installing the hoses, do not twist them or bend them sharply.
If they are installed so, their service life will be extremely shortened and they may be damaged.
MAINTENANCE PRECAUTIONS FOR MAINTENANCE
4-3
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