Komatsu PW98MR-10, Operation & Maintenance Manual

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NOTICE
• After completing the air bleeding operation, stop the engine, leave the machine for 5 minutes, and
then start the operation. This discharges the air bubbles in the oil inside the hydraulic tank.
• Check for oil leakage and wipe off any spilled oil.
METHOD FOR CHECKING WHEEL NUT TIGHTENING
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WARNING
• Do not increase the specified tightening torque and keep it within the prescribed ranges.
• Avoid lubricating the thread when the tightening torque must be checked.
This check serves to restore the correct tightening torque of the wheels on the hubs.
The tightening torque must be checked by means of a torque wrench (1).
Tightening: 550±5 Nm
Use a 32 mm wrench.
METHOD FOR CHECKING AND ADJUSTING TOE-IN
This check must be carried out according to the time intervals fixed by the operator, since any anomaly regard-
ing the wheel toe-in is due to impacts or vibrations that depend on the type of surface on which the machine
works.
Another reason that should lead the operator to perform this check is abnormal wear of the front or rear tyres.
The machine has been designed with a toe-in equal to 0 mm.
Every adjustment must restore this value and must be carried out on the coupling bars (1) after loosening the
nuts (2) that lock them. Use 22 and 36 mm wrenches.
During this check and the relevant adjustment, it is advisable to
check also the conditions of the articulated heads (3); if a con-
siderable slack is observed, change them immediately.
METHOD FOR BLEEDING AIR FROM BRAKING CIRCUIT
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WARNING
• During this operation the engine must be running, therefore proceed very carefully.
• Leave all the work equipment locks engaged and position wedges under the wheels before starting
the bleeding operation.
This operation is important, since it ensures the braking efficiency and the power of the machine.
MAINTENANCE MAINTENANCE PROCEDURE
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WENAM00061