Machine Operations And Controls; Before Starting Engine; Walk-Around Checks - Komatsu PC450-8 Operation & Maintenance Manual

OPERATION

MACHINE OPERATIONS AND CONTROLS

BEFORE STARTING ENGINE

Walk-around Checks

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.
Also check for loose wiring, play, and collection of dust at places that reach high temperature.
Remove any flammable materials from around the battery, engine, muffler, turbocharger, or other high
temperature engine parts.
Leakage of fuel or oil will cause the machine to catch fire. Check carefully, be sure to repair any problem,
or contact your Komatsu distributor.
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, 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 flammable material (dry leaves,
twigs, etc.) around the battery, engine muffler, turbocharger, or other high temperature engine parts. If any dirt
or flammable materials are found, remove them.
For the method of removing dirt from the radiator, see "CLEAN AND INSPECT RADIATOR FINS, OIL
COOLER FINS, AFTERCOOLER FINS AND CONDENSER FINS (4-61)".
3. Check for coolant and oil leakage around the engine
Check for oil leakage from the engine and coolant leaks from the cooling system. If any problem is found,
repair it.
4. Check for oil leakage from hydraulic equipment, hydraulic tank, hoses, and joints
Check for oil leakage. If any problem is found, repair the area where oil is leaking.
5. 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.
MACHINE OPERATIONS AND CONTROLS
WARNING
3
3
3
3-111