| Item | Part No. | Part Name | Qty | Serial No. |
| (363-17-31101) | PUMP ASS'Y,(A4V40DA-991-1) | | 10659-10877 |
| (363-17-31101) | PUMP ASS'Y,(A4V40DA-991-0) | | 10001-10658 |
| | THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1610-01A0 TO Y1610-07A0. | | |
| | THE UCHIDA YUATSU KIKI PART NUMBER IS THAT UC IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| (UCB1141R0453-0) | PUMP ASS'Y,PISTON | | 10001-@ |
| | THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1610-02A0 T0 Y1610-06A0. | | |
| (\7\UC4100371369) | CYLINDER ASS'Y,LEANING | | 10001-10877 |
| 1 | (\7\UC1704003377) | PISTON | | 10001-10877 |
| 2 | (\7\UC1704144597) | ROD | | 10001-@ |
| 3 | (\7\UC1100311131) | SPRING | | 10001-@ |
| 4 | (\7\UC4100337222) | RETAINER | | 10001-@ |
| 5 | (\7\UC1100347855) | SPACER | | 10001-@ |
| 6 | (\7\UC1100367399) | RING,SNAP | | 10001-@ |
| 7 | (\7\UC1100347589) | NUT | | 10001-@ |
| 8 | (\7\UC1100360169) | COVER | | 10001-@ |
| 9 | UC1100360179 | COVER | | 10001-@ |
| 10 | 02891-02042 | O-RING | | 10001-@ |
| 11 | 01252-30612 | BOLT | | 10001-@ |
| 12 | UC1100310495 | NUT | | 10001-@ |
| 13 | UC1301178003 | O-RING | | 10001-@ |
| 14 | UC1701533645 | PLUG | | 10001-@ |
