Swing Speed and Swing Drift on a Slope - Check
Measuring the swing speed on a slope will determine if there is a need to check the swing motor. Measuring the swing drift on a slope will determine if there is a need to check the swing parking brake.
Note: The engine speed and/or the machine configuration that is used during this test can affect the results of this test. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for the engine speed that was used for this test.
Note: The relief valve pressure settings must be set to the relief valve pressure specification before performing this operational check. Refer to Testing and Adjusting, "Specifications".
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Required Tools     | |
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Description     | Qty     |
Tape Measure     | 1     |
Stopwatch     | 1     |
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Illustration 1 | g00816380 |
(A) 12 degrees |
- Complete the following steps in order to measure the swing speed on a slope.
- Start the engine.
- Place the engine speed dial in the HIGH IDLE position.
- Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).
- Load the bucket .
Weight of bucket load ... 105 kg (231.5 lb)
- Position the machine on a slope of 12 degrees. Refer to Illustration 1.
- Position the implements at maximum reach and close the bucket. Position the bucket above the ground so that the bucket will not come in contact with any obstacles.
- Place the engine speed dial in the LOW IDLE position.
- Position the upper structure at position (X) . The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 2.
Show/hide tableIllustration 2 g01154250
- Measure the time that is required to swing the upper structure from position (X) to position (Y) .
- Position the upper structure at position (Z) . The upper structure should be at a 90 degree angle to the lower structure.
- Measure the time that is required to swing the upper structure from position (Z) to position (Y) .
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Table 2 Swing Time     Item     Specification     Right Swing     3 min or less     Left Swing    
- Complete the following steps in order to measure the swing drift on a slope.
- Load the bucket.
Weight of bucket load ... 105 kg (231.5 lb)
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- Position the upper structure at position (X) . The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 3.
- To indicate the relationship of the two positions, put a mark (C) on the inner race and the outer race of the swing bearing. Refer to Illustration 4.
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(A) Upper frame
(B) Undercarriage frame
(C) Marking
- Start the engine. Position the implements at maximum reach. Place the engine at the LOW IDLE position. Place the hydraulic activation lever in the UNLOCKED position.
- Leave the machine in this position for three minutes. Measure the swing drift on the circumference of the swing bearing.
- Position the upper structure at position (Z) . The upper structure should be at a 90 degree angle to the lower structure. Refer to Illustration 3.
- Repeat Steps 2.c through 2.e.
- Load the bucket.
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Swing Drift     | |
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Item     | Specification     |
Maximum Drift     | 120 mm (4.7 inch)     |
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