Komatsu HM400-5, Operation & Maintenance Manual

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1.
Install wire (4) as shown in the figure.
2.
By using the tip of the wire as a benchmark, measure the
amount of movement (L) of the coupling.
3.
Rotate the coupling at a force of approximately 49 N {5 kg}
to the circumferential direction with bar (5), etc.
4.
Mark the position of the wire.
5.
Check that the engine crankshaft is not rotating.
REMARK
If excessive force is applied in rotating the coupling, the
engine rotates at idle and it becomes impossible to judge
accurately.
6.
Rotate the coupling in the reverse direction from step 3.
7.
Mark the position of the wire similarly to Step 3.
8.
Measure the amount of movement (L) of the coupling by
using the marks made in steps 4 and 7.
If amount of movement (L) is more than 12 mm, the rubber
inside the output shaft may be deteriorated or damaged,
so ask your Komatsu distributor for disassembly and in-
spection of the internal parts of the output shaft.
SELECT AND CHECK TIRES
k k
WARNING
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.
MAINTENANCE MAINTENANCE PROCEDURE
4-31