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3.9 ADJUSTING RUBBER TRACK TENSION
[1] Inspection/adjustment of rubber track tension
The pins and bushings around the footage of the Machine shows varied states of abrasion depending on the working
conditions and soil quality. Check the tension of rubber track at any time to maintain the standard tension.
Conduct the inspection and adjustment on a flat and solid ground.
[Inspection]
1. Keep the engine revolution in an idling state to allow the Machine to
go forward for a distance equal to the length of rubber track in
contact with the ground, and slowly stop traveling.
2. Place a rectangular bar (3) which can bridge between the idler (1)
and upper rolling wheel (2) on the crawler belt.
3. Measure the maximum sagging dimension between the upper plane
of rubber track and the bottom surface of the square bar.
Reference value for amount of slack (a): 10 - 20 mm
[Adjustment]
If the result of test indicates that the tension differs from the standard value, adjust it in the following manner:
[Strengthening the tension]
• Have a grease pump available.
1. Inject grease through the grease nipple (1) using the grease pump.
2. To ensure that a proper tension is applied, keep the engine at an
idling speed to travel forward for a distance equal to the length of
rubber track in contact with the ground, and slowly stop traveling.
3. Check the tension of rubber track again.
If the tension is not appropriate, make another adjustment.
CAUTION
Grease can be injected until dimension (S) reaches “0 mm”.
However, with the tension slack, abrasion of pins and bushings will
increase.
As reversing or replacement of pins and bushings is required,
contact us or our sales agency for repair.
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