OPERATIONAL PERFORMANCE TEST / Excavator Test SWING FUNCTION DRIFT CHECK Summary: 1. Measure the swing drift on swing bearing outer circumference when stopping after a 180 ° full-speed swing and check the performance of swing brake valve. 2. The mechanical brake for swing parking brake is equipped for the swing motor. Preparation: 1. Check lubrication of the swing gear and swing bearing. 2. Place the machine on flat, solid ground with ample space for swinging. Do not conduct this test on a slope. 3. With the arm fully retracted and the bucket fully extended, hold the bucket so that the height of the bucket pin is the same as the boom foot pin. The bucket must be empty. 4.
Put the matching marks on the swing bearing outer circumference (upperstructure side) and the track frame. 5. Swing the upperstructure 180 ° . 6. Maintain the hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F). Put the matching marks on swing bearing outer circumfer- ence and track frame. T105-06-03-008 T105-06-03-009 Before start the measurement, swing the upperstructure 180 ° CAUTION: Prevent personal injury. Always make sure that the area is clear and that co-workers are out of the swing area before starting the measurement. T4-4-6