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2.1.3 CHECKING AFTER STARTING ENGINE
Check the followings in this section after starting the engine and before starting the first work every day.
CAUTION
The checkups described in this section should be carried out after starting the machine.
Refer to "Operation 2.2 Starting Engine" and later to execute the engine startup, traveling
operations, outrigger operations and crane operations.
[1] CHECKING/ADJUSTING RUBBER TRACK TENSION
CAUTION
• Set the outriggers and raise the rubber track for about 50 mm from the ground when
checking/adjusting the tension of the rubber tracks.
• The standard tension of the rubber track is that the clearance between the wheel tread of the
track roller at center and the shoulder of the rubber track is 5 to 10 mm.
• If the tension is not sufficient even after injecting the grease, the rubber track or the sealing of
the tension adjustment cylinder needs to be changed.
Contact us or our sales service agency for the judgement of whether to replace, repair, or keep
the rubber track.
The rubber tracks are worn out differently depending on the working conditions and soil quality. Regularly
check the wear and tension of the rubber tracks.
Especially, with the new machine or when a new part was installed, “initial slack” appears with 5 to 30
hours of driving after adjusting the tension to the specified value.
Adjust the tension frequently until the period of “initial slack” passes. This will prevent “rubber track from
coming off due to insufficient tension on the rubber track”.
[TENSION CHECK]
1. Move the left and right crawlers so that the junction of the rubber
track (indicated by M) comes to the top center between the
axles.
2. See “Operation 2.14 Outrigger Setting Operation” to set the
outriggers and raise the crawlers for about 50mm from the
ground.
3. Measure the clearance between the wheel tread of the track
roller at center and the shoulder of the rubber track.
NOTES
The clearance of 5 to 10 mm indicates the standard tension.
4. If the tension is out of the standard range, see the section of
tension adjustment on the next page to make adjustments.
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