MACHINE OPERATIONS AND CONTROLS
CHECKS AND ADJUSTMENT BEFORE ST
ARTING 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, leakage of fuel, oil and coolant. Also check the condition of the work equipment and
the hydraulic system.
Check also for loose wiring, play, and accumulation of dust in places that get very hot and are exposed to ex-
tremely high temperatures.
WARNING
• The
engine rear cover and cooling cover must be fixed with the rod when it is opened during per-
forming check and maintenance.
• Accumulation of combustible material or leakage of fuel or oil around the high temperature parts
such as the engine muffler or battery may cause fire.
Check carefully, and if any abnormality is found, repair it or contact your Komatsu distributor.
• Check that the floor is securely fixed with bolts.
If it is not securely fixed, it may lead to a serious personal injury or death.
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 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, engine muffler, or other high temperature engine parts. If any dirt or combus-
tible materials are found, remove them.
3.
Check around the engine for coolant and oil leakage.
Check for oil leakage from the engine and coolant leakage from the cooling system. If any problem is found,
repair it.
4.
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.
5.
Check the hydraulic component, hydraulic tank, hoses, and joints for oil leakage.
Check for oil leakage. If any problem is found, repair the place where the oil is leaking.
6.
Check the undercarriage (track, sprocket, idler, guard) for damage, wear, loose bolts, or leakage of oil from
rollers.
If any problem is found, repair it.
7.
Check for abnormality of the handrail and loose bolts.
If any problem is found, repair it. Tighten any loose bolts.
8.
Check and clean the machine monitor.
Check the machine monitor for damage. If it has any damage, replace it. When cleaning dust, etc. on the
machine monitor surface, use a clean, soft, and dry cloth.
REMARK
When cleaning the stains deposited on the machine monitor surface such as dusts, brush them off using a
clean, soft and dry cloth.
For sticky dirt such as oil, remove it with glass cleaner for family use on the market (weakly acid to weakly
alkaline, containing no abrasive), and then finish-wipe with a clean, soft, and dry cloth.
OPERATION MACHINE OPERATIONS AND CONTROLS
3-131
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