One track slower than the other
How many hours on the machine. What year is the unit. Have you checked the planetary of both sides to see if you have too much oil on this side or maybe too little oil in it. How is the track tension on each side when you push down sideways with the bucket on the ground to raise that side track off the ground. Did you spin the track while it is up in the air to see if you have a seized idler wheel or seized undercarriage rollers. Have you hooked up any gauges to check pressures at the traction motor lines. Maybe start with the other checks first before geting into the gauges. Simon C
Good day The attached may help. Kind regards Uffex