1.
Install the 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 49 N {5 kg}  to the circum-
ferential direction by using 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 the step
3.
7.
Mark the position of the wire similarly to the step 3.
8.
Measure the amount of movement (L) of the coupling by
using the marks made in the steps 4 and 7.
If amount of movement (L) exceeds 15 mm, the rubber in-
side the output shaft may be deteriorated or damaged, so
ask your Komatsu distributor for disassembly and inspec-
tion of the internal parts of the output shaft.
SELECT AND CHECK TIRES
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
4-35
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