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• TIGHT TENSION (DECREASE TENSION)
Inside the rubber track tension adjustment device has the grease sealed. The grease is under
high pressure due to the tension of the rubber track.
Making adjustments without observing the followings may cause the grease valve to fly away,
resulting in serious accidents.
• Do not loosen the grease valve for tension adjustment for more than 1 turn. The grease valve
may pop out.
• Do not place yourself right in front of the grease valve when adjusting the tension to avoid any
danger.
1. Slowly loosen the grease valve (1) to drain the grease.
NOTES
When loosening the grease valve (1), do not loosen more than
for one turn.
2. If the grease is not drained easily, perform the following to drain
the grease.
(1) See “Operation 2.24 Outrigger Stowing Operation” to stow
the outriggers and lower the machine on the ground.
(2) Move the machine forward/backward.
(3) See “Operation 2.14 Outrigger Setting Operation” to set the
outriggers and raise the crawlers again for about 50mm from
the ground.
3. Tighten the grease valve (1).
4. Perform the “tension check” of the rubber track.
If the tension is not appropriate, make another adjustment.
5. See “Operation 2.24 Outrigger Stowing Operation” to stow the
outriggers and lower the machine on the ground.
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