| Item | Part No. | Part Name | Qty | Serial No. |
| 23D-60-12401 | CONTROL VALVE ASS'Y | 4028-4500 | ||
| THE KAYABA KOGYO PART NUMBER IS THAT KB IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | ||||
| KB21013-21426 | SPOOL SECTION ASS'Y | 4001-4500 | ||
| KB21013-21462 | SPOOL SECTION ASS'Y,BLADE LIFT | 4028-4500 | ||
| 1 | \6\ | HOUSING | 4001-4500 | |
| 2 | \6\ | HOUSING,BLADE LIFT | 4001-4500 | |
| 3 | \6\ | O-RING (K15) | 4001-4500 | |
| 4 | \6\ | WIPER (K15) | 4001-4500 | |
| 5 | \6\ | SPOOL | 4001-4500 | |
| 6 | KB21011-22457 | SPRING | 4001-4500 | |
| 7 | KB21011-21251 | SEAT,SPRING | 4001-4500 | |
| 8 | KB21011-22351 | SCREW | 4001-4500 | |
| 9 | KB21011-21851 | CAP | 4001-4500 | |
| 10 | KB21011-21152 | SEAL,PLATE | 4001-4500 | |
| 11 | KB92702-05121 | BOLT | 4001-4500 | |
| 12 | KB21011-22251 | HEAD,SPOOL | 4001-4500 | |
| 13 | KB21011-31507 | LINK | 4001-4500 | |
| 14 | KB21011-33307 | PIN | 4001-4500 | |
| 15 | KB94311-05082 | WASHER | 4001-4500 | |
| 16 | KB93601-12082 | PIN,COTTER | 4001-4500 | |
| 17 | KB21011-21951 | BRACKET | 4001-4500 | |
| 18 | 23D-60-12121 | BRACKET,BLADE LIFT | 4001-4500 | |
| 19 | KB21011-21152 | SEAL,PLATE | 4001-4500 | |
| 20 | KB92702-05121 | BOLT | 4001-4500 | |
| 21 | KB21011-21052 | VALVE | 4001-4500 | |
| 22 | KB21011-22452 | SPRING | 4001-4500 | |
| 23 | \6\ | O-RING (K15) | 4001-4500 | |
| 24 | KB21013-20932 | VALVE ASS'Y | 4001-4500 | |
| 25 | KB21013-20931 | VALVE ASS'Y | 4001-4500 | |
| KB21013-35142 | SPOOL SECTION ASS'Y,CIRCLE REVERSE | 4001-4500 | ||
| 26 | \6\ | HOUSING | 4001-4500 | |
| 27 | \6\ | O-RING (K16) | 4001-4500 | |
| 28 | \6\ | WIPER (K16) | 4001-4500 | |
| 29 | \6\ | SPOOL | 4001-4500 | |
| 30 | KB21011-30646 | SPRING | 4001-4500 | |
| 31 | KB21011-30702 | SEAT,SPRING | 4001-4500 | |
| 32 | KB21011-30507 | SCREW | 4001-4500 | |
| 33 | KB21011-31044 | CAP | 4001-4500 | |
| 34 | KB21011-31702 | PLATE | 4001-4500 | |
| 35 | KB92702-06181 | BOLT | 4001-4500 | |
| 36 | KB21011-31507 | LINK | 4001-4500 | |
| 37 | KB21011-33307 | PIN | 4001-4500 | |
| 38 | KB94311-05082 | WASHER | 4001-4500 | |
| 39 | KB93601-12082 | PIN,COTTER | 4001-4500 | |
| 40 | KB21011-31205 | BRACKET | 4001-4500 | |
| 41 | KB21011-31702 | PLATE | 4001-4500 | |
| 42 | KB92702-06181 | BOLT | 4001-4500 | |
| 43 | KB21011-32404 | POPPET | 4001-4500 | |
| 44 | KB21011-30604 | SPRING | 4001-4500 | |
| 45 | \6\ | O-RING (K16) | 4001-4500 | |
| KB21011-21252 | SPACER ASS'Y | 4001-4500 | ||
| 46 | KB21011-20665 | SPACER | 4001-4500 | |
| 47 | KB97123-01111 | PLUG | 4001-4500 | |
| 48 | KB21011-32409 | POPPET | 4001-4500 | |
| KB21013-20170 | INLET SECTION ASS'Y | 4001-4500 | ||
| 49 | KB21011-20164 | HOUSING | 4001-4500 | |
| 50 | \6\ | O-RING | 4001-4500 | |
| KB21003-00207 | PLUG ASS'Y | 4001-4500 | ||
| 51 | KB21001-00504 | PLUG | 4001-4500 | |
| 52 | \6\ | O-RING | 4001-4500 | |
| KB21003-00202 | PLUG ASS'Y | 4001-4500 | ||
| 53 | KB21001-00726 | PLUG | 4001-4500 | |
| 54 | \6\ | O-RING | 4001-4500 | |
| 55 | KB21013-30664 | RELIEF VALVE ASS'Y | 4001-4500 | |
| KB21013-36008 | INLET SECTION ASS'Y | 4001-4500 | ||
| 56 | KB21011-36307 | HOUSING | 4001-4500 | |
| 57 | \6\ | O-RING | 4001-4500 | |
| KB21003-00207 | PLUG ASS'Y | 4001-4500 | ||
| 58 | KB21001-00504 | PLUG | 4001-4500 | |
| 59 | \6\ | O-RING | 4001-4500 | |
| KB21003-00191 | PLUG ASS'Y | 4001-4500 | ||
| 60 | KB21001-00127 | PLUG | 4001-4500 | |
| 61 | \6\ | O-RING | 4001-4500 | |
| 62 | KB21051-30108 | STUD | 4001-4500 | |
| 63 | KB93118-08652 | NUT | 4001-4500 | |
| 64 | KB21051-30107 | STUD | 4001-4500 | |
| 65 | KB93128-10082 | NUT | 4001-4500 |