| Item | Part No. | Part Name | Qty | Serial No. |
| 21W-60-22120 | VALVE ASS'Y | 5001- | ||
| THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1680-01A0 AND Y1680-02A0. | ||||
| THE NABCO PART NUMBER IS THAT NA IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | ||||
| 1 | NAD33217152101 | BLOCK | 5001- | |
| 2 | \6\ | BLOCK | 5001- | |
| 3 | \6\ | BLOCK | 5001- | |
| 4 | \6\ | BLOCK | 5001- | |
| 5 | NAD33214825301 | BLOCK | 5001- | |
| 6 | NAC01200055010 | O-RING | 5001- | |
| 7 | NAE51413047126 | BOLT | 5001- | |
| 8 | NAB01011008004 | NUT | 5001- | |
| 9 | \6\ | SPOOL,BLADE | 5001- | |
| 10 | \6\ | SPOOL,OFFSET | 5001- | |
| 11 | \6\ | SPOOL,SWING | 5001- | |
| 12 | \6\ | SPOOL,BOOM HIGH | 5001- | |
| 13 | NAE55414586501 | SEAL,OIL | 5001- | |
| 14 | NAD33090504004 | PLATE | 5001- | |
| 15 | NAA02010601051 | BOLT | 5001- | |
| 16 | NAD33414362401 | RETAINER | 5001- | |
| 17 | NAE574134171 | SPRING | 5001- | |
| 18 | NAE51417062001 | BOLT | 5001- | |
| 19 | NAD33414760401 | CASE | 5001- | |
| 20 | NAE51416985101 | BOLT | 5001- | |
| 21 | NAC01100022010 | O-RING | 5001- | |
| 22 | NAD33416861901 | RETAINER | 5001- | |
| 23 | NAE57416861701 | SPRING | 5001- | |
| 24 | NAE57417321301 | SPRING | 5001- | |
| 25 | NAD33416861801 | CASE | 5001- | |
| 26 | NAA02010604051 | BOLT | 5001- | |
| 27 | NAD33090701014 | POPPET | 5001- | |
| 28 | NA4M82472 | SPRING | 5001- | |
| 29 | NAD33090703014 | PLUG | 5001- | |
| 30 | NAC01100014010 | O-RING | 5001- | |
| 31 | 07040-11007 | PLUG | 5001- | |
| 32 | 07002-11023 | O-RING | 5001- | |
| 33 | NAE14412921801 | PLUG | 5001- | |
| 34 | NAC01100015010 | O-RING | 5001- | |
| 35 | (NAD33316087823) | VALVE ASS'Y,MAIN RELIEF | 5001- | |
| 36 | (NAD33417031603) | VALVE ASS'Y,SAFETY | 5001- | |
| 37 | (NAD33417057801) | PLUG ASS'Y | 5001- | |
| 38 | (NAD33415911901) | VALVE ASS'Y,SUCTION | 5001- |