ATG20939 Alternator – Heavy-Duty 24V for Komatsu Wheel Loaders
? Core Specifications:
OEM Brand: Nikko
Voltage: 24V (Heavy-duty for construction equipment)
Amperage: 90A (High-output for hydraulic/electrical systems)
Regulator: External (Separate mounting for easy replacement)
Fan Type: Internal (Protected from debris)
Pulley: Internal (Integrated design for compact fit)
Regulator Clock Position: 2:00 (Terminal orientation)
B+ Terminal: M8-1.25 (Metric threaded stud)
Polarity: Negative Ground
Weight: 41 lbs (18.6 kg)
? Compatible Komatsu Models:
✅ Wheel Loaders:
WA200-6
WA250-6
WA380-6
? Cross-Reference Part Numbers:
| Komatsu OEM | Aftermarket/Alternate |
|---|---|
| 600-825-9112 (Primary) | 0-35000-8640 |
| 600-825-9110 | 0-35000-8641 |
| 600-825-9111 | – |
? Key Features:
✔ Nikko OEM Design – Built to Komatsu’s rugged standards.
✔ 90A Output – Powers lights, hydraulics, and onboard electronics.
✔ External Regulator – Easy maintenance/replacement.
✔ Internal Pulley & Fan – Reduces dust/debris ingress.
? Installation Notes:
Verify pulley alignment (Komatsu uses specific belt tension specs).
Check wiring harness (B+ terminal requires secure M8 connection).
Regulator mounting – Position at 2 o’clock per Komatsu schematics.
