| Item | Part No. | Part Name | Qty | Serial No. |
| (361-17-21200) | PUMP ASS'Y,(A4VG28DA-987-0) | | 10222-10841 |
| (361-17-21200) | PUMP ASS'Y,(A4VG28DA-999-1) | | 10001-10221 |
| | THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1610-01A0 TO Y1610-07A0. | | |
| | THE UCHIDA YUATSU PART NUMBER IS THAT UC IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| (UCB1043R9914-0) | PUMP ASS'Y,PISTON | | 10222-10841 |
| (UCC9845A0376-0) | PUMP ASS'Y,PISTON | | 10001-10221 |
| | THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1610-02A0 TO Y1610-06A0. | | |
| 1 | (\7\UC4704375889) | ROTARY ASS'Y | | 10001-@ |
| 2 | (\7\UC4704340893) | CYLINDER ASS'Y,LEANING | | 10001-@ |
| 3 | (\7\UC4100362017) | COVER ASS'Y | | 10222-10841 |
| (\7\UC4100356241) | COVER ASS'Y | | 10001-10221 |
| 4 | UC4100368143 | RELIEF VALVE ASS'Y,HIGH PRESSURE | | 10001-@ |
| 5 | UC4704336674 | RELIEF VALVE ASS'Y,LOW PRESSURE | | 10001-@ |
| 6 | (\7\UC4100356627) | CONTROL VALVE ASS'Y | | 10001-@ |
| 7 | UC4100368152 | DA CURTRIDGE ASS'Y | | 10001-@ |
| 8 | (\7\UC4100376933) | HOUSING | | 10222-@ |
| (\7\UC4100372729) | HOUSING | | 10001-10221 |
| 9 | UC1704260763 | COVER | | 10001-@ |
| 10 | UC1704352779 | PACKING | | 10001-@ |
| 11 | 01252-30612 | BOLT | | 10001-@ |
| 12 | UC1100389629 | PLUG | | 10222-@ |
| UC1704142289 | PLUG | | 10001-10221 |
| 13 | (\7\UC1704142279) | PIN | | 10001-@ |
| 14 | (\7\UC1700023809) | SPRING | | 10001-@ |
| 15 | (\7\UC1302193049) | PIN,SPRING | | 10001-@ |
| 16 | 02891-02009 | O-RING | | 10222-@ |
| UC1701527265 | PACKING | | 10001-10221 |
| 17 | UC1100362276 | PIN | | 10222-@ |
| UC1704328328 | PIN | | 10001-10221 |
| 18 | UC1181712007 | NUT | | 10222-10841 |
| UC1100310495 | NUT | | 10001-10221 |
| 19 | UC1701516926 | PLUG | | 10222-@ |
| UC1701533646 | PLUG | | 10001-10221 |
| 20 | 07000-02014 | O-RING | | 10222-10841 |
| UC1301178003 | O-RING | | 10001-10221 |
| 21 | UC1100350071 | PLUG | | 10001-@ |
| 418-62-11620 | O-RING | | 10001-@ |
| 22 | UC1607054546 | PLUG | | 10001-@ |
| 416-62-11480 | O-RING | | 10001-@ |
| 23 | UC1700843025 | SEAL | | 10001-@ |
