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Model List:
- 521F Tier 4 Wheel Loader
- 1. FourWheel Drive (4WD) system 23
- 1.1. Drive shaft 314
- 2. Front axle system 25
- 2.1. Powered front axle 100
- 2.2. Front bevel gear set and differential 102
- 2.3. Final drives 310
- 3. Rear axle system 27
- 3.1. Powered rear axle 100
- 3.2. Rear bevel gear set and differential 106
- 3.3. Planetary and final drives 120








