| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 23E-60-11201 | 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 | KB20121-30101 | COVER | 5901- | |
| 4 | \6\ | GEAR,DRIVE (KIT A) | 5901- | |
| 5 | \6\ | GEAR,DRIVEN (KIT A) | 5901- | |
| 6 | \6\ | BUSHING (KIT A) | 5901- | |
| 7 | \6\ | BUSHING (KIT A) | 5901- | |
| 8 | \6\ | PACKING,RING (KIT B) | 5901- | |
| 9 | \6\ | PACKING,RING (KIT B) | 5901- | |
| 10 | \6\ | SEAL,BODY (KIT B) | 5901- | |
| 11 | \6\ | SEAL (KIT B) | 5901- | |
| 12 | KB20121-31285 | BOLT | 5901- | |
| 13 | KB94101-10250 | WASHER,SPRING | 5901- | |
| 14 | \6\ | SEAL,OIL (KIT B) | 5901- | |
| 15 | \6\ | RING,SNAP (KIT B) | 5901- | |
| SERVICE KIT | ||||
| KIT A | 23E-60-05130 | SERVICE KIT,GEAR | 5901- | |
| KIT B | 23E-60-05140 | SERVICE KIT,SEAL | 5901- |