TRACK SUSPENSION ASSEMBLY.
The track suspension assembly assists in supporting,
propelling, and steering the paving machine.
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.
Drive Sprocket Gear: The drive sprocket
gear transfers drive power to the track chain.
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.
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
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.
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.
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.