| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crawler belt tensile force adjustment device for preventing the seat failure of a check-valve. Ž<P>SOLUTION: The crawler belt tensile force adjustment device includes a cylinder body having a filling chamber for filling grease, and a piston rod slidably inserted into the cylinder body. The protrusion amount of the piston rod from the cylinder body is set in accordance with the filling amount of the grease. The cylinder body includes an injection valve 53 and a discharging valve. The injection valve 53 has a valve body 66 with a passage 65. The check-valve 67, a foreign matter intrusion preventing valve 69, and a foreign matter intrusion preventing filter 68 are arranged in the passage 65. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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