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OPERATION
MACHINE OPERATIONS AND CONTROLS
MACHINE OPERATIONS AND CONTROLS
BEFORE STARTING ENGINE
Walk-around Checks
Before starting the engine, look around and under the machine to check for loose nuts and bolts, or leakage of oil,
fuel, or coolant, and check condition of the work equipment and hydraulic system. Also check for loose wiring, play,
and accumulation of dust at places with high temperatures.
WARNING
When carrying out check or maintenance work inside the engine hood or dust cover, be sure to open them up to the upper end
and secure them with a stopper.
Remove any flammable materials from around the battery or engine muffler, or other high temperature engine parts. Leakage
of fuel or oil will cause the machine to catch fire. Check carefully, and sure to repair any abnormalities, or please contact your
Komatsu distributor.
If the machine is at an angle, reposition it level before checking.
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 that there are no cracks, excessive wear, or play in the work equipment, cylinders, linkage, or hoses. If
any problem is found, repair it.
2. Remove dirt and dust from around engine, battery and radiator.
Check if there is any dirt or dust accumulated around the
engine or radiator. Check also if there is any flammable
material (dead leaves, twigs grass etc.) accumulated around
the battery or high temperature engine parts, such as the
engine muffler. Remove all such dirt or flammable material.
Check thoroughly if there is any dust stuck particularly
between exhaust muffler (1) and exhaust muffler cover (2).
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.
6. Check for problems in handrails, steps, loose bolts.
If any problem is found, repair it. Tighten any loose bolts.
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Summary of Contents for PC78MR-6
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