Komatsu HM400-5, Operation & Maintenance Manual

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WARNING
If worn or damaged tires are used, they may burst and
cause serious injury or death.
To ensure safety, do not use the following tires.
Wear
• Tires with a tread grooves of less than 15 % of that
of a new tire
• Tires with extreme uneven wear or with stepped-
type wear
Damage
• Tires with damage that has reached cords (1), or
with cracks in the rubber
• Tires with cut or broken cords (1)
• Tires with peeling (separation)
• Tires with damaged bead (2)
• Leaking or improperly repaired tubeless tires
• Deteriorated, deformed or abnormally damaged
tires, which do not seem usable.
20. Check the wheel rims.
Check that the wheel rims and rings are free from deformation, damage caused by corrosion, and cracks.
In particular, check the side rings, lock rings and rim flanges thoroughly.
METHOD FOR CHECKING BEFORE STARTING
Always check the items in this section before starting the engine each day.
METHOD FOR DRAINING WATER AND SEDIMENT FROM FUEL TANK
1.
Open fuel drain valve cover (1).
2.
Place a container to receive drained oil under drain valve
(2) at the bottom of the fuel tank.
3.
Loosen drain valve (2) to drain all the sediment and water
accumulated at the bottom together with fuel.
4.
When clean fuel flows out, close drain valve (2).
METHOD FOR CHECKING LOOSENESS OF WHEEL HUB BOLTS, RETIGHTEN-
ING BOLTS
Check wheel hub bolts (1) for breakage or looseness.
If any wheel hub bolt (1) of a wheel is broken, replace all the
wheel hub bolts (1) for that wheel.
If any bolt is loose, retighten it.
Tightening torque: 824 to 1030 Nm {84 to 105 kgm}
Insert a socket wrench in a pipe, then apply a force of 932 N
{95 kg} at point 1 m from the fulcrum. This will give a tightening
torque of 932 Nm {95 kgm}.
When the hub bolts are tightened after the tires are replaced,
travel for 5 to 6 km, then check for loose hub bolts.
MACHINE OPERATIONS AND CONTROLS OPERATION
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