| 摘要 |
A track tensioning system for a track assembly having, an idler wheel, a drive wheel, a drive track entrained about the drive wheel and idler, and a hydraulic motor operable to advance the drive wheel. A drive circuit is operable to supply pressurized fluid to the hydraulic motor. An actuator coupled to the idler wheel has a travel chamber and a recoil chamber, and the recoil chamber is pressurized to urge the idler wheel in a first direction away from the drive wheel to tension the track. A controlled delivery mechanism in fluid communication with the drive circuit and the travel chamber of the actuator is operable to receive from the drive circuit pressurized fluid supplied to the hydraulic motor and responsively deliver a controlled quantity of fluid to the travel chamber of the actuator. The actuator is operable to reduce the track tension responsive to receipt of the controlled quantity of fluid.
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