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Model List:
- 521F Tier 4B (Final) Wheel Loader
- 1. Electrical systems 55
- 1.1. Engine control system 015
- 1.2. Engine starting system 201
- 1.3. Alternator 301
- 1.4. Battery 302
- 1.5. Cold start aid 202
- 1.6. Fuel tank system 011
- 1.7. Selective Catalytic Reduction (SCR) electrical system 988
- 1.8. Exhaust Gas Recirculation (EGR) electrical system 989
- 1.9. Engine cooling system 012
- 1.10. Transmission control system 024
- 1.11. Cab brake controls 519
- 1.12. Service brake electrical system 030
- 1.13. Parking brake electrical system 031
- 1.14. Cab controls 512
- 1.15. Hydraulic system control 036
- 1.16. Cab Heating, Ventilation, and AirConditioning (HVAC) controls 051
- 1.17. Heating, Ventilation, and AirConditioning (HVAC) control system 050
- 1.18. Steering control system 047
- 1.19. Cab controls (Lift arm, Boom, Dipper, Bucket) 524
- 1.20. Loader arm and bucket control system 415
- 1.21. Wiper and washer system 518
- 1.22. External lighting 404
- 1.23. External lighting switches and relays 405
- 1.24. Cab lighting 514
- 1.25. Cab or platform harnesses and connectors 510
- 1.26. Warning indicators, alarms, and instruments 408








