| Item | Part No. | Part Name | Qty | Serial No. |
| 363-N39-4250 | VALVE ASS'Y | | 20001- |
| | THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1683-01A0 AND Y1683-02A0. | | |
| | THE KAYABA KOGYO PART NUMBER IS THAT KB IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| 42A-64-13160 | INLET SECTION ASS'Y | | 20001- |
| 1 | KB21011-30336 | HOUSING,INLET | | 20001- |
| 2 | KB21001-00106 | O-RING | | 20001- |
| 363-64-33220 | SPOOL SECTION ASS'Y | | 20001- |
| 3 | \6\ | HOUSING | | 20001- |
| 4 | KB21011-32404 | POPPET | | 20001- |
| 5 | KB21011-30604 | SPRING | | 20001- |
| 6 | KB21001-00106 | O-RING | | 20001- |
| 7 | \6\ | SPOOL | | 20001- |
| 8 | KB21001-00689 | O-RING | | 20001- |
| 9 | KB21011-32801 | WIPER | | 20001- |
| 10 | KB21011-31702 | PLATE | | 20001- |
| 11 | KB91111-60102 | SCREW | | 20001- |
| 12 | KB21011-31856 | SLEEVE | | 20001- |
| 13 | KB21001-00689 | O-RING | | 20001- |
| 14 | KB95151-02800 | O-RING | | 20001- |
| 15 | KB21011-30702 | SEAT,SPRING | | 20001- |
| 16 | KB21011-30630 | SPRING | | 20001- |
| 17 | KB21011-32801 | WIPER | | 20001- |
| 18 | KB21011-31707 | PLATE | | 20001- |
| 19 | KB21011-30565 | PIN | | 20001- |
| 20 | KB93317-05322 | NUT | | 20001- |
| 21 | KB21011-33453 | PLATE | | 20001- |
| 22 | KB21001-01456 | BOLT,HEAD | | 20001- |
| 23 | KB95111-02550 | O-RING | | 20001- |
| 24 | KB21001-01458 | SHIM | | 20001- |
| 25 | KB25113-30127 | TUBE,COIL | | 20001- |
| 26 | KB95111-02550 | O-RING | | 20001- |
| 27 | KB21011-31095 | CAP | | 20001- |
| 28 | KB21001-01457 | BOLT,HEAD | | 20001- |
| 29 | 42A-64-13270 | PLUG | | 20001- |
| 30 | 42A-64-13280 | O-RING | | 20001- |
| 31 | 42A-64-13220 | RELIEF VALVE ASS'Y,MAIN | | 20001- |
| 32 | KB21001-00036 | O-RING | | 20001- |
| 33 | 42A-64-13230 | RELIEF VALVE ASS'Y,OVERLOAD | | 20001- |
| 34 | KB21001-00036 | O-RING | | 20001- |
| 35 | 42A-64-13250 | PLUG,(FOR SHIPPING) | | 20001- |
