| Item | Part No. | Part Name | Qty | Serial No. |
| 20K-61-31121 | CYLINDER ASSEMBLY | H55051- | ||
| 1 | 20K-61-31870 | CYLINDER | H55051- | |
| 2 | 20K-61-31860 | ROD, PISTON | H55051- | |
| 3 | 20K-61-31850 | PISTON | H55051- | |
| 4 | 20K-61-31840 | GUIDE | H55051- | |
| 5 | 20K-61-31830 | CARTRIDGE, CHECK VALVE | H55051- | |
| 6 | 20K-61-31640 | O-RING (KIT) | H55051- | |
| 7 | 20K-61-31630 | RING, BACK-UP (KIT) | H55051- | |
| 8 | 20K-61-31620 | RING, BACK-UP (KIT) | H55051- | |
| 9 | 20K-61-31610 | O-RING (KIT) | H55051- | |
| 10 | 20K-61-31590 | RING, BACK-UP (KIT) | H55051- | |
| 11 | 20K-61-31580 | O-RING (KIT) | H55051- | |
| 12 | 20K-61-31820 | WIPE (KIT) | H55051- | |
| 13 | 20K-61-31810 | WIPE (KIT) | H55051- | |
| 14 | 20K-61-31790 | O-RING (KIT) | H55051- | |
| 15 | 20K-61-31780 | RING, WEAR (KIT) | H55051- | |
| 16 | 20K-61-31770 | O-RING (KIT) | H55051- | |
| 17 | 20K-61-31760 | RING, BACK-UP (KIT) | H55051- | |
| 18 | 20K-61-31750 | O-RING (KIT) | H55051- | |
| 19 | 20K-61-31740 | RING (KIT) | H55051- | |
| 20 | 20K-61-31730 | O-RING (KIT) | H55051- | |
| 21 | 20K-61-31720 | RING, BACK-UP (KIT) | H55051- | |
| 22 | 20K-61-31710 | RING, WEAR (KIT) | H55051- | |
| 23 | 20K-61-31690 | O-RING (KIT) | H55051- | |
| 24 | 20K-61-31680 | RING, BACK-UP (KIT) | H55051- | |
| 25 | 20K-61-31670 | NUT, LOCK | H55051- | |
| 26 | 20K-61-31240 | SCREW | H55051- | |
| 27 | 20K-61-31660 | BEARING | H55051- | |
| 28 | 20K-61-31650 | CIRCLIP | H55051- | |
| 29 | 20K-61-31220 | NIPPLE, GREASE | H55051- | |
| KIT | 20K-61-31570 | SEAL KIT | H55051- |