TRACK-ADJUSTING AND RECOIL MECHANISM

A track-type tractor comprising an endless track entrained about a drive sprocket and an idler has a self-contained adjuster and recoil mechanism operatively connected to the idler to maintain a preset tension on the endless track. The recoil portion of the mechanism comprises a compressible material contained in a housing which yieldably urges the idler wheel in a forward direction. The tension in the track may be easily adjusted through the admission of an incompressible fluid into a variable volume chamber to thereby permit easy adjustment of the track tension to accommodate changing conditions of track wear.