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MAINTENANCE
REMARK
•
Perform the inspection while the travel speed is 10 km/h or higher. ECSS (Electronically Controlled
Suspension System) does not operate when the travel speed is 4 km/h or lower even if the ECSS
switch is turned on.
•
The effect of the ECSS decreases while the machine is in the posture that the bucket is at TILT end
and it touches the stopper on the boom.
•
Slightly operate the bucket toward DUMP side to release it from the stopper of the boom, and then the
effect of the ECSS increases.
METHOD FOR CHECKING FUNCTION OF BRAKE ACCUMULATOR
For handling of the accumulator, see "HANDLE ACCUMULATOR AND GAS SPRING".
When the brake pedal is depressed, the hydraulic spring effect of the accumulator actuates the brake smoothly.
If any change is felt in the smoothness of the brake operation during daily operations, the gas pressure in the
accumulator has probably dropped.
Ask your Komatsu distributor for inspection.
REMARK
Even if there is any change in the smoothness, there is no drop in the braking force or brake performance.
SELECT AND CHECK TIRES
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If a tire or a rim is handled improperly, the tire may burst or
may be damaged and the rim may be broken and scat-
tered, and that can cause serious injury or death.
•
Since maintenance, disassembly, repair and assembly of
the tires and rims require special equipment and skill, be
sure to ask a tire repair shop to do the work.
•
Never perform welding or light a fire near the tire.
TIRE SELECTION
Select the tires according to the conditions of use and the weight of the attachments on the machine.
Use only specified tires and inflate them to the specified pressure.
Select the tires according to the conditions of use and the weight of the attachments of the machine.
Use the tires shown in the following table.
The travel speed displayed varies with the tire size.
NOTICE
For usability of tires, consult your Komatsu distributor.
•
Do not install the tire protector (mesh chain) to rear wheels.
•
Do not to use tires, such as urethane tires, that weigh remarkably more than the standard tires
since the machine can be damaged due to an unexpected load.
•
If a tire not specified by Komatsu is used, rim displacement between the tire and rim may occur.
Operator comfort, as well, may be degraded.
WARNING
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WARNING
MAINTENANCE PROCEDURE
4-41
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