1.25 TRACK SUSPENSION ASSEMBLY

TM 5-3895-373-34 1.25 TRACK SUSPENSION ASSEMBLY. The track suspension assembly assists in supporting, propelling, and steering the paving machine. a. Drive Hub Assembly: The drive hub assembly is bolted to the main frame of the paving machine. The drive hub transfers energy from the hydraulic propulsion system to the drive sprocket gear. b. Drive Sprocket Gear: The drive sprocket gear transfers drive power to the track chain. c. Track Tensioning Cylinder: The track tensioning cylinder receives a 900 psi (6205 kPa) hydraulic charge after engine startup and applies this constant pressure to the track idler to establish and maintain proper track tension. d. Track Idler: The track idler is located at the forward end of the track frame and has a fixed amount of travel to compensate for changes in track tension. From its forward location, the track idler supports the front end track loop and maintains proper track tension by sliding forward and back in conjunction with the track tensioning cylinder. The track idler roller also helps reduce track rolling resistance. e. Track Frame: The track frame is bolted directly to the machine frame. It provides support to two top track rollers and eight lower rollers. The unit houses the track tensioning cylinder and track idler. f. Track: The track consists of a series of track pads bolted to a track chain. The track chain, engaged with the rotating drive sprocket gear, propels the paving machine along the ground. g. Track Rollers: Track rollers provide support for the track chain and aid in its alignment. The rollers also create a lower demand for drive power by reducing track rolling resistance. 1-15