| Item | Part No. | Part Name | Qty | Serial No. |
| 23D-60-12800 | CONTROL VALVE ASS'Y | | 5901- |
| | THE KAYABA KOGYO PART NUMBER IS THAT KB IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| KB21013-35188 | SPOOL SECTION ASS'Y | | 5901- |
| 1 | \6\ | HOUSING | | 5901- |
| 2 | \6\ | O-RING (KIT) | | 5901- |
| 3 | \6\ | WIPER (KIT) | | 5901- |
| 4 | \6\ | SPOOL | | 5901- |
| 5 | KB21011-30613 | SPRING | | 5901- |
| 6 | KB21011-30702 | SEAT,SPRING | | 5901- |
| 7 | KB21011-30507 | SCREW | | 5901- |
| 8 | KB21011-31011 | CAP | | 5901- |
| 9 | KB21011-31702 | PLATE | | 5901- |
| 10 | KB92702-06181 | BOLT | | 5901- |
| 11 | KB21011-31702 | PLATE | | 5901- |
| 12 | KB91111-60102 | SCREW | | 5901- |
| 13 | KB21011-32404 | POPPET | | 5901- |
| 14 | KB21011-30606 | SPRING | | 5901- |
| 15 | \6\ | O-RING (KIT) | | 5901- |
| KB21013-36640 | SPOOL SECTION ASS'Y | | 5901- |
| 16 | \6\ | HOUSING | | 5901- |
| 17 | \6\ | O-RING (KIT) | | 5901- |
| 18 | \6\ | WIPER (KIT) | | 5901- |
| 19 | \6\ | SPOOL | | 5901- |
| 20 | \6\ | O-RING | | 5901- |
| 21 | KB21011-30646 | SPRING | | 5901- |
| 22 | KB21011-32313 | WASHER | | 5901- |
| 23 | KB21011-30702 | SEAT,SPRING | | 5901- |
| 24 | KB21011-30528 | SCREW | | 5901- |
| 25 | KB21011-31044 | CAP | | 5901- |
| 26 | KB21011-31702 | PLATE | | 5901- |
| 27 | KB92702-06181 | BOLT | | 5901- |
| 28 | KB21011-31702 | PLATE | | 5901- |
| 29 | KB91111-60102 | SCREW | | 5901- |
| 30 | KB93812-10200 | PIN | | 5901- |
| 31 | \6\ | O-RING (KIT) | | 5901- |
| KB21013-30758 | SECTION ASS'Y,FLOW CONTROL | | 5901- |
| 32 | \6\ | HOUSING | | 5901- |
| 33 | \6\ | SPOOL | | 5901- |
| 34 | KB21011-36504 | SPRING | | 5901- |
| 35 | KB21011-30997 | SPACER | | 5901- |
| 36 | KB21011-30998 | SPACER | | 5901- |
| 37 | \6\ | O-RING | | 5901- |
| 38 | \6\ | RING,BACK-UP | | 5901- |
| 39 | KB21011-32512 | ADJUSTER | | 5901- |
| 40 | KB21011-32947 | PLUG | | 5901- |
| 41 | \6\ | O-RING | | 5901- |
| 42 | KB21001-00504 | PLUG | | 5901- |
| 43 | \6\ | O-RING | | 5901- |
| 44 | KB21011-32404 | POPPET | | 5901- |
| 45 | KB21011-30604 | SPRING | | 5901- |
| 46 | \6\ | O-RING | | 5901- |
| 47 | KB21011-30153 | OUTER SECTION | | 5901- |
| KB21013-36018 | INLET SECTION ASS'Y | | 5901- |
| 48 | KB21011-36315 | HOUSING | | 5901- |
| 49 | \6\ | O-RING | | 5901- |
| KB21003-00207 | PLUG ASS'Y | | 5901- |
| 50 | KB21001-00504 | PLUG | | 5901- |
| 51 | \6\ | O-RING | | 5901- |
| 52 | 23D-60-05100 | VALVE ASS'Y,RELIEF | | 5901- |
| 53 | KB21041-30104 | STUD | | 5901- |
| 54 | KB93118-08652 | NUT | | 5901- |
| 55 | KB21041-30103 | STUD | | 5901- |
| 56 | KB93128-10082 | NUT | | 5901- |
| | SERVICE KIT | | |
| KIT | 23E-60-05120 | SERVICE KIT,CONTROL VALVE | | 5901- |
