| 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.Y1610-01A0A TO Y1610-07A0B . | | |
| | 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 |
| | THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1610-02A0A T0 Y1610-06A0. | | |
| UC4100571211 | COVER ASS'Y | | 21212- |
| (\7\UC4100440346) | COVER ASS'Y | | 20642-21211 |
| 1 | UC1100559773 | COVER | | 21212- |
| 1 | (\7\UC4100441101) | COVER | | 20642-21211 |
| 2 | 02891-02081 | O-RING | | 20642- |
| 3 | UC1300034003 | O-RING | | 20642- |
| 4 | 02890-01088 | O-RING | | 21212- |
| 4 | (\7\UC1701570838) | RING | | 20642-21211 |
| 5 | 01252-31260 | BOLT | | 20642- |
| 6 | UC1100354275 | COUPLING | | 20642- |
| 7 | UC1701532459 | BEARING | | 20642- |
| 8 | UC1701539213 | PLUG | | 21212- |
| 8 | (\7\UC1701533646) | PLUG | | 20642-21211 |
| 9 | UC1198273603 | PLUG | | 20642- |
| 10 | UC1301169009 | O-RING | | 20642- |
| 11 | UC1701533389 | PLUG | | 20642- |
| UC4100368143 | RELIEF VALVE ASS'Y,HIGH PRESSURE | | 21212- |
| UC4100441064 | RELIEF VALVE ASS'Y,HIGH PRESSURE | | 20642-21211 |
| 12 | UC4100372748 | VALVE ASS'Y | | 20642- |
| 13 | UC1300146005 | O-RING | | 20642- |
| 14 | UC1300166009 | O-RING | | 20642- |
| 15 | UC1609041827 | NUT | | 20642- |
| 16 | UC1100310514 | NUT,CAP | | 20642- |
| 17 | UC1800042449 | O-RING | | 20642- |
| UC4704336674 | RELIEF VALVE ASS'Y,LOW PRESSURE | | 21212- |
| UC4100441073 | RELIEF VALVE ASS'Y,LOW PRESSURE | | 20642-21211 |
| 18 | UC1704328209 | GUIDE | | 20642- |
| 19 | UC1704328199 | PLUNGER | | 20642- |
| 20 | UC1704244615 | SPRING | | 20642- |
| 21 | UC1701537996 | SHIM, 0.5MM | | 20642- |
| 21 | UC1701570782 | SHIM, 1.0MM | | 20642- |
| 21 | UC1701578667 | SHIM, 0.3MM | | 20642- |
| 22 | UC1704328189 | PLUG | | 20642- |
| 23 | UC1300158008 | O-RING | | 20642- |
| UC4100368152 | DA CURTRIDGE ASS'Y | | 21212- |
| UC4100441091 | DA CURTRIDGE ASS'Y | | 20642-21211 |
| 24 | UC4100372775 | DA CURTRIDGE ASS'Y | | 20642- |
| 25 | 04065-01410 | RING,SNAP | | 20642- |
| 26 | UC1300170008 | O-RING | | 20642- |
| 27 | UC1609041836 | NUT | | 20642- |
| 28 | UC1100310505 | NUT,CAP | | 20642- |
| 29 | 02890-01009 | O-RING | | 20642- |
