Komatsu H75051, Operation & Maintenance Manual

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MACHINE OPERATIONS AND CONTROLS
CHECKS AND ADJUSTMENT BEFORE STARTING ENGINE
METHOD FOR WALK-AROUND CHECK
Before starting the engine, walk around the machine and look at the underside of chassis for anything unusual
like loose bolts and nuts, damage of each part, or leakage of oil, fuel, or coolant. Also check the condition of the
work equipment and the hydraulic system. Also check for loose wiring, play, and accumulation of dust in places
that reach high temperatures.
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WARNING
Any combustible materials accumulated around the exhaust pipe, aftertreatment devices, turbocharger,
or other high temperature engine parts or the battery, and leakage of fuel or oil will cause the machine
to catch fire.
Check carefully, and if any abnormality is found, repair it or contact your Komatsu distributor.
If the machine is inclining, make it level before checking.
Always perform the following inspections and cleaning every day before starting engine for the day's work.
1.
Check for damage, wear, play in work equipment, cylinders, linkage, and hoses.
Check for cracks, excessive wear, play in work equipment, cylinders, linkage, and hoses. If any problem is
found, repair it.
2.
Remove dirt and debris from the center hinge portion.
Check for the deposit such as dirt and debris. If any of them is found, remove it.
3.
Remove dirt and debris from around the engine, battery, and radiator.
Check for dirt accumulated around the engine and radiator. Also check for combustible material (dry leaves,
twigs, etc.) around the battery, aftertreatment devices, turbocharger, or other high temperature engine parts.
If any dirt or combustible materials are found, remove them.
4.
Check around the engine for leakage of coolant, oil, and exhaust gas.
Check the engine for leakage of oil and exhaust gas, and check the cooling system for coolant leakage. If
any problem is found, repair it.
5.
Check the fuel line for leakage.
Check for leakage of fuel or damage to the hoses and tubes. If any problem is found, repair it.
6.
Remove dirt and check DEF line for leakage.
Check for dirt accumulated around the DEF tank and clean blue DEF tank filler cap and surrounding area.
Check DEF tank, pump, injector, and hoses and their connections for leakage. If any problem is found, ask
your Komatsu distributor for repair.
7.
Remove dirt from around the aftertreatment devices.
Check for dirt and combustible materials (dry leaves, twigs, etc.) accumulated around the aftertreatment de-
vices. If any dirt or combustible materials are found, remove them.
8.
Check around the aftertreatment devices for exhaust gas leakage.
Check the pipe connecting the turbocharger to the aftertreatment devices and also connections of the after-
treatment devices for leakage of exhaust gas (and deposition of soot).
If any problem is found, ask your Komatsu distributor for repair.
9.
Check KCCV piping for gas leakage and oil leakage.
Check the pipes (3 pieces) between the KCCV filter, turbocharger, oil pan, and cylinder head for oozing oil.
If any problem is found, ask your Komatsu distributor for repair.
10. Check around SCR for exhaust gas leakage.
Check the pipe between the KDPF and SCR and also the SCR connections for leakage of exhaust gas
(and urea deposit). If any problem is found, ask your Komatsu distributor for repair.
OPERATION MACHINE OPERATIONS AND CONTROLS
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