Komatsu HD785-5, Operation & Maintenance Manual

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OPERATION
OPERATION
OPERATION
CHECK BEFORE STARTING ENGINE
WALK-AROUND CHECK
Before starting the engine, look around the machine and under the machine to check for loose nuts or bolts, or
leakage of oil, fuel, or coolant, and check the condition of the hydraulic system.
Check also for loose wiring, play, and accumulation of dust in places that get very hot and are exposed to extremely
high temperatures.
WARNING
Be sure to attach the warning sign on the operaation lever of the machine.
Leakage of oil or fuel, or accumulation of flammable material around high temperature parts, such as the engine muffler or
turbocharger, may cause fire. Check carefully, and if any abnormality is found, repair it or contact your Komatsu distributor.
Always carry out the following items before starting the engine each day.
1. Check the dump body, frame, tires, cylinders, linkage, and hoses for cracks or excessive wear or play.
Check the dump body, frame, tires, cylinders, linkage, and hoses for cracks or excessive wear or play, and carry out
repairs if any problem is found.
2. Remove dirt from around engine, battery, radiator, and aftercooler.
Check that there is no dirt or dust accumulated around the engine, radiator or aftercooler. Check also that there is
no flammable material (dry leaves, twigs, etc.) accumulated around the battery, or engine, muffler, turbocharger, or
other high temperature parts of the engine. Remove any dirt or flammable materials that are found.
3. Check for leakage of water or oil around engine
Check that there is no oil leakage from the engine or coolant leakage from the cooling system. If any problem is
found, repair it.
4. Check for oil leakage from transmission case, differential case, final drive case, brake oil tank, hydraulic tank,
hose, joint
Check that there is no oil leakage. If any problem is found, repair the place where the oil is leaking.
Check for leakage of oil from the undercover. Check the ground for traces of oil leakage.
5. Check for loose air cleaner mounting bolts.
Check for the loose bolts. If loose, tighten them.
6. Check dump body mount rubber
Check for any cracks, embedded foreign objects, or loose bolts.
7. Check for damage to handrail, loose bolts
Repair any damage and tighten any loose bolts.
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