| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 23E-60-11101 | PUMP ASS'Y | | 5901- |
| | THE KAYABA KOGYO PART NUMBER IS THAT KB IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| 2 | KB20121-30705 | FLANGE | | 5901- |
| 3 | KB20121-40105 | PLATE,CENTER | | 5901- |
| 4 | \6\ | BODY | | 5901- |
| 5 | KB20121-30101 | COVER | | 5901- |
| 6 | \6\ | GEAR,DRIVE¤ FRONT (KIT A) | | 5901- |
| 7 | \6\ | GEAR,DRIVEN¤ FRONT (KIT A) | | 5901- |
| 8 | \6\ | BUSHING (KIT A) | | 5901- |
| 9 | \6\ | BUSHING (KIT A) | | 5901- |
| 10 | \6\ | PACKING,RING (KIT C) | | 5901- |
| 11 | \6\ | PACKING,RING (KIT C) | | 5901- |
| 12 | \6\ | GEAR,DRIVE¤ REAR (KIT B) | | 5901- |
| 13 | \6\ | GEAR,DRIVEN¤ REAR (KIT B) | | 5901- |
| 14 | \6\ | BUSHING (KIT B) | | 5901- |
| 15 | \6\ | BUSHING (KIT B) | | 5901- |
| 16 | \6\ | PACKING,RING (KIT C) | | 5901- |
| 17 | \6\ | PACKING,RING (KIT C) | | 5901- |
| 18 | \6\ | SEAL (KIT C) | | 5901- |
| 19 | \6\ | SEAL (KIT C) | | 5901- |
| 20 | KB20121-41802 | COUPLING | | 5901- |
| 21 | KB20121-41225 | BOLT | | 5901- |
| 22 | KB94101-10250 | WASHER,SPRING | | 5901- |
| 23 | \6\ | SEAL,OIL (KIT C) | | 5901- |
| 24 | \6\ | RING,SNAP (KIT C) | | 5901- |
| | SERVICE KIT | | |
| KIT A | 23E-60-05080 | SERVICE KIT,FRONT GEAR | | 5901- |
| KIT B | 23E-60-05090 | SERVICE KIT,REAR GEAR | | 5901- |
| KIT C | 23A-60-05210 | SERVICE KIT,SEAL | | 5901- |
