OPERATIONAL PERFORMANCE TEST / Excavator Test SWING BEARING PLAY Summary: Measure the swing bearing play and check the wear of bearing races and balls. Preparation: 1. Check the swing bearing mounting bolts for looseness. 2. Check lubrication of the swing bearing. Confirm that bearing rotation is smooth without noise. 3. Secure a dial gauge on the round trunk of track frame by using a magnetic base. 4. Position the upperstructure so that the boom aligns with the tracks facing towards the front idlers. 5. Position the dial gauge so that its needle point comes into contact with the bottom surfaceface of swing bearing outer race. 6. The bucket should be empty.
Dial Gauge Magnetic Base T105-06-03-014 NOTE: The measured value will vary depending on where the magnet base is secured. Secure the magnet base onto the round trunk or in a position as close to the swing bearing as possible. Round Trunk T105-06-03-015 T4-4-12