| Item | Part No. | Part Name | Qty | Serial No. |
| 56B-74-3A301 | Body Assembly | 5156- | ||
| 56B-74-3A300 | Body Assembly | 5001-5155 | ||
| 1 | Body | 5156- | ||
| 1 | Body | 5001-5155 | ||
| 56B-83-32000 | Extension Assembly | 5001- | ||
| 2 | 56B-83-32110 | Plate, Welded | 5001- | |
| 3 | 56B-83-32120 | Plate, Welded | 5001- | |
| 4 | 56B-83-32130 | Plate, Welded | 5001- | |
| 5 | 56B-83-32140 | Plate, Welded | 5001- | |
| 6 | 56B-83-32150 | Plate, Welded | 5001- | |
| 7 | 56B-83-32160 | Plate, Welded | 5001- | |
| 8 | 56B-83-32170 | Plate, Welded | 5001- | |
| 9 | 56B-83-32180 | Plate, Welded | 5001- | |
| 10 | 56B-83-32190 | Plate, Welded | 5001- | |
| 11 | 56B-83-32210 | Plate, Welded | 5001- | |
| 12 | 56B-83-32220 | Plate, Welded | 5001- | |
| 13 | 56B-83-32230 | Plate, Welded | 5001- | |
| 14 | 09690-P1800 | Plate, Komatsu Logo | 5001- |