ENGINE AR- 4578508 - Caterpillar

Put a bar 4 to 5 ft. (1.2 to 1.5 m) long between the sprocket (1) and roller frame. Put side force at front and back of sprocket to test for loose sprocket hub bearings. The machine should be on smooth ground with no objects under the track that would put force against sprocket.If bearing adjustment is needed, complete the following steps: 1. Remove dirt guard (2). Remove the bolt and lock that holds adjustment nut (5) in position.2. Remove cap (3) and lock (7). Check retaining nut (4) for tightness. Loosen adjustment nut (5) one or two turns by turning it in a clockwise direction.3. Tighten retaining nut (4) to a torque of 600 to 700 lb. ft. (815 to 950 N m).4. While turning sprocket (1) four or five revolutions, tighten adjustment nut (5) to a torque of 900 to 1200 lb. ft. (1225 to 1630 N m) by turning it in a counterclockwise direction. Use a 7S9306 Spanner Wrench and a 5 ft. (1.5 m) extension to have the torque needed. Tighten nut in the same direction to next notch to install the lock and bolt that holds the adjustment nut.5. Install lock (7) and cap (3). Install the dirt guard (2).