| Item | Part No. | Part Name | Qty | Serial No. |
| 23B-60-11400 | PUMP ASS'Y | | 4501-4731 |
| | THE KAYABA KOGYO PART NUMBER IS THAT KB IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| 1 | KB20121-60705 | FLANGE | | 4501-4731 |
| 2 | \6\ | BODY,FRONT | | 4501-4731 |
| 3 | KB20121-70101 | PLATE,CENTER | | 4501-4731 |
| 4 | \6\ | BODY,REAR | | 4501-4731 |
| 5 | KB20121-60101 | COVER,REAR | | 4501-4731 |
| 6 | \6\ | GEAR,DRIVE¤ FRONT (KIT A) | | 4501-4731 |
| 7 | \6\ | GEAR,DRIVEN¤ FRONT (KIT A) | | 4501-4731 |
| 8 | \6\ | BUSHING (KIT A) | | 4501-4731 |
| 9 | \6\ | BUSHING (KIT A) | | 4501-4731 |
| 10 | \6\ | GEAR,DRIVE¤ REAR (KIT B) | | 4501-4731 |
| 11 | \6\ | GEAR,DRIVEN¤ REAR (KIT B) | | 4501-4731 |
| 12 | \6\ | BUSHING (KIT B) | | 4501-4731 |
| 13 | \6\ | BUSHING (KIT B) | | 4501-4731 |
| 14 | \6\ | PACKING,RING (KIT C) | | 4501-4731 |
| 15 | \6\ | PACKING,RING (KIT C) | | 4501-4731 |
| 16 | \6\ | SEAL (KIT C) | | 4501-4731 |
| 17 | \6\ | O-RING (KIT C) | | 4501-4731 |
| 18 | \6\ | SEAL,OIL (KIT C) | | 4501-4731 |
| 19 | \6\ | RING,SNAP (KIT C) | | 4501-4731 |
| 20 | KB20121-71801 | COUPLING | | 4501-4731 |
| 21 | KB20121-41236 | BOLT | | 4501-4731 |
| 22 | KB94101-10250 | WASHER,SPRING | | 4501-4731 |
| | SERVICE KIT | | |
| KIT A | KB2012B-70011 | GEAR ASS'Y | | 4501-4731 |
| KIT B | KB2012B-70018 | GEAR ASS'Y | | 4501-4731 |
| KIT C | KB2012A-70003 | SERVICE KIT,SEAL | | 4501-4731 |
