| Item | Part No. | Part Name | Qty | Serial No. |
| (363-17-31402) | PUMP ASS'Y,(A4VG28DA-931-0) | | 21212- |
| (363-17-31401) | PUMP ASS'Y,(A4VG28DA-965-1) | | 20642-21211 |
| | THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1610-02A0A TO Y1610-06A0A . | | |
| | THE UCHIDA YUATSU KIKI PART NUMBER IS THAT UC IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | | |
| (UCBA041S9146-0) | PUMP ASS'Y,PISTON | | 21212- |
| (UCB1043R9565-0) | PUMP ASS'Y,PISTON | | 20642-21211 |
| | THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1610-02A0A TO Y1610-06A0. | | |
| 1 | UC4704375889 | ROTARY ASS'Y | | 20642- |
| 2 | UC4704340893 | CYLINDER ASS'Y,LEANING | | 20642- |
| 3 | UC4100571211 | COVER ASS'Y | | 21212- |
| 3 | (\7\UC4100440346) | COVER ASS'Y | | 20642-21211 |
| 4 | UC4100368143 | RELIEF VALVE ASS'Y,HIGH PRESSURE | | 21212- |
| 4 | UC4100441064 | RELIEF VALVE ASS'Y,HIGH PRESSURE | | 20642-21211 |
| 5 | UC4704336674 | RELIEF VALVE ASS'Y,LOW PRESSURE | | 21212- |
| 5 | UC4100441073 | RELIEF VALVE ASS'Y,LOW PRESSURE | | 20642-21211 |
| 6 | UC4100448139 | CONTROL VALVE ASS'Y | | 20642- |
| 7 | UC4100368152 | DA CURTRIDGE ASS'Y | | 21211- |
| 7 | UC4100441091 | DA CURTRIDGE ASS'Y | | 20642-21211 |
| 8 | UC1100355618 | HOUSING | | 21212- |
| 8 | (\7\UC4100376933) | HOUSING | | 20642-21211 |
| 9 | UC1704260763 | COVER | | 20642- |
| 10 | UC1704352779 | PACKING | | 20642- |
| 11 | 01252-30612 | BOLT | | 20642- |
| 12 | UC1100389629 | PLUG | | 20642- |
| 13 | UC1704142279 | PIN | | 20642- |
| 14 | UC1700023809 | SPRING | | 20642- |
| 15 | UC1302193049 | PIN,SPRING | | 20642- |
| 16 | 02891-02009 | O-RING | | 20642- |
| 17 | UC1100362276 | PIN | | 20642- |
| 18 | UC1100357779 | NUT | | 20642- |
| 19 | UC1701516926 | PLUG | | 20642- |
| 20 | UC1301177009 | O-RING | | 20642- |
| 21 | UC1100350071 | PLUG | | 20642-21211 |
| 21 | 418-62-11620 | O-RING | | 20642-21211 |
| 22 | UC1607054546 | PLUG | | 20642-21211 |
| 22 | 416-62-11480 | O-RING | | 20642-21211 |
| 23 | UC1700843025 | SEAL | | 20642- |
