NOTE

NEVER replace components of the track or track frame without consulting the wear limitation charts in the manufacturer's service manual.

TRACK REMOVAL (fig. 6-29). - Steps for the removal of the track are as follows:

1. RELEASE TRACK TENSION. Either by manually backing off the track adjuster or loosening the vent screw on the hydraulic track adjuster.

2. REMOVE THE MASTER PIN. The master pin can be identified by a locking device or hole drilled in its end that distinguishes it from the other pins in the chain. Move the tractor backward slowly or, on some models, forward to bring the master pin just below the level of the drawbar. Place a block under the grouser on a shoe that allows the master pin to be centered on the front idler. With the master pin centered on the front idler, remove any locking device. If the master pin had a locking device, the pin can be removed by using a sledgehammer and a soft metal driftpin. Should the pin be drilled, a portable press must be used to remove the pin. Do not lose the bushings, which may drop out with the pin.

3. REMOVE THE TRACK FROM THE CARRIER ROLLERS AND IDLER. Slowly move the tractor forward or backward away from the loose ends of the track. Make sure no one is in the way of the tractor or the loose end of the track when it falls off the sprocket or front idler.

4. MOVE THE TRACTOR OFF THE TRACK. Place a plank at the rear of the track. The plank should be about the same thickness as the track, yet narrow enough to fit between the track frame and guards, and long enough so that the entire tractor can rest on the plank.

NOTE

After removing the tracks, always see that the tractor is securely blocked while repairs are being performed.

Anytime a track is removed, thoroughly inspect the track frame components for excessive wear and misalignment. Removal, disassembly, and replacement vary by model and manufacturer. Consult the manufacturer's service manual for exact procedures.

REPLACING TRACKS. - To replace the tracks, back the tractor off the plank and onto the new tracks so the drive sprocket properly meshes with the track rail. Continue backing until the tractor is just ahead of the rear end of the track. Then place a bar in the track (fig. 6-30), and help the track climb over the sprocket, carrier rollers, and idler as the tractor is driven forward. When the track comes together, install the master pin and any locking device. Once the track is together, adjust the track tension using the manufacturer's recommended procedures.

Figure 6-30. - Pulling track over sprocket.

Figure 6-29. - Removing tracks.