Komatsu WA250PT-5H, Operation & Maintenance Manual

Page: 112 / 255

Operation
OPERATION
Check before starting engine, adjust
3-54
Operation 0.
Check before starting engine, adjust 0.
Walk-around check 0.
Before starting the engine, walk around the machine and look to the underside of chassis for anything unusual like
looseness of the bolts and nuts, leakage of fuel, oil and cooling water. Also check the condition of the work equip-
ment and the hydraulic system.
Check also for loose wiring, play, and collection of dust at places which reach high temperature.
WARNING
Remove any flammable materials from around the battery or engine muffler, turbocharger, or other high
temperature engine parts. Leakage of fuel or oil will cause the machine to catch fire. Check carefully, and
be sure to repair any abnormalities, or please contact your Komatsu distributor.
Always carry out the items in this section before starting the engine each day.
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 abnormality 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 flamma-
ble material (dead leaves, twigs, etc.) accumulated around the battery or high temperature engine parts, such
as the engine muffler or turbocharger. Remove all such dirt or flammable material.
3. Check for coolant or oil leakage around engine.
Check that there is no oil leakage from the engine or coolant leakage from the cooling system. If any abnormal-
ity is found, repair it.
4. Check for oil leakage from HST piping, transfer case, axle, hydraulic tank, hoses and joints.
Check that there is no oil leakage. If any abnormality is found, repair the leakage.
5. Check for oil leakage from brake line.
Check that there is no oil leakage. If any abnormality is found, repair the leakage.
6. Check for damage or wear to tires and loose mounting bolts.
Check for cracks or peeling of the tires and for cracks or wear to the wheels (side rim, rim base, lock ring).
Tighten any loose wheel nuts. If any abnormality is found, repair or replace the part.
If any valve caps are missing, install new caps.
7. Check for damage and loose bolts on handrail and steps.
Repair any damage and tighten any loose bolts.
8. Check the fill level of the grease container of the central lubrication system (optional). Refill grease if required.
On the display of the lubrication pump, check that there is no error message. For more information, see the
chapter SPECIAL EQUIPMENT AND ATTACHMENTS"Operating the central lubrication system".
9. Check for loose air cleaner mounting bolts.
Check for the loose bolts, and if loose, tighten up.
10.Check for loose battery terminals.
Tighten any loose terminal.