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Komatsu 6731-62-4130 Belt Tensioner Assembly
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| Part Type | Automatic Belt Tensioner |
|---|---|
| Drive System | Alternator Belt |
| Mounting Style | Direct Bolt-On |
| Pulley Type | Ribbed Polymer Pulley |
| Bearing Type | Sealed Ball Bearing |
| Spring Type | Torsion Spring |
| Construction Material | Steel Bracket, Polymer Pulley |
| Net Weight | 3.5 kg |
| Package Dimensions | 22 × 15 × 12 cm |
Manufacturer No.
- 6731-62-4130
- 6731624130
OEM Part No.
- 6731-62-4130
Interchange No.
- 6732-62-4130
- 6732-61-4130
- 6736-61-4150
- 6731-61-4510
- 6731-61-4141
- 6736-61-4120
Fitment Vehicles
- Komatsu WB142-5
- Komatsu WB146-5
- Komatsu WB146PS-5
- Komatsu WB156-5
- Komatsu WB156PS-5
The Komatsu 6731-62-4130 is an automatic belt tensioner designed for the alternator drive system on specific Komatsu backhoe loaders. It maintains optimal serpentine belt tension to prevent slippage and ensure consistent alternator output under varying engine loads.
This tensioner assembly features a steel mounting bracket, a torsion spring mechanism, and a ribbed polymer pulley with sealed bearings. It is engineered as a direct bolt-on replacement for the OEM unit, requiring no modifications during installation. Compatible with Komatsu WB142-5, WB146-5, WB146PS-5, WB156-5, and WB156PS-5 models.
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