Morooka MST-800VD, Руководство по эксплуатации и техническому обслуживанию

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3-14
7.4 WHEN REQUIRED
[1] CHECK, ADJUST RUBBER CRAWLER TENSION
The tension adjuster for the rubber crawler is charged with grease. The grease is kept under high pressure by the
recoil spring inside the tension adjuster.
Always follow the precautions given below. Failure to follow these precautions may cause the valve to fly out,
resulting in serious injury or accident.
• Never loosen the tension adjustment valve more than one turn. There is danger that the valve may fly out.
• When adjusting the tension, never stand directly in front of the valve. It is dangerous.
• CHECKING TENSION
1. Drive the machine a short distance forward and backward, then stop the
engine.
2. Measure distance A from the rear end of the track frame to the center of the
idler, and check that it is within the following range.
Dimension A : 315
±
5 mm
If the result of the measurement shows that dimension A is greater than the
specified range, adjust the rubber crawler tension. For details, see
“ADJUSTING TENSION”.
• ADJUSTING WHEN TENSION IS LOOSE (When measurement is below range for dimension A)
Before adjusting, prepare a grease pump.
1. Remove 2 bolts, then remove grease valve cover (1).
2. Using the grease pump, pump in grease through valve (2) until dimension A
is within the range given for “CHECKING TENSION”.
If dimension A does not enter the range above even when grease is
pumped in, the rubber crawler must be replaced, or there is probably
some abnormality in the tension adjuster, so please contact your
distributor.
3. Drive the machine a short distance forward and backward to make the
tension uniform, then repeat the steps for “CHECKING TENSION” to
measure dimension A .
4. Install grease valve cover (1), then tighten the bolts.