| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 58B-50-01250 | CYLINDER HEAD ASSEMBLY | | |
| 1 | 58B-50-01260 | HEAD | | |
| 1 | EL3415 | QUILL ASSEMBLY | | |
| 1 | EL3414 | QUILL | | |
| 1 | 722187 | POPPET, BALL | | |
| 1 | EB8590 | PLUG | | |
| 2 | VM2202 | PLUG, VENT | | |
| 3 | VN9097 | CAPSCREW - 1" - 8NC X 2 3/4" | | |
| 4 | WA0364 | FLAT WASHER - 1" (HARDENED) | | |
| 5 | WA0458 | O-RING (1) | | |
| 6 | WA1458 | RING, BACKUP (1) | | |
| 7 | 58B-50-01450 | SNAP RING | | |
| 8 | 58B-50-01470 | BEARING - 12 5/8" (1) | | |
| 9 | 58B-50-01310 | SEAL - 12 5/8" (1) | | |
| 10 | TY1503 | SEAL (1) | | |
| 11 | 58B-50-01280 | RETAINER, BEARING | | |
| 12 | WA1627 | CAPSCREW - 7/8" - 9NC X 2 1/2" | | |
| 13 | 58B-50-01480 | BEARING - 15 1/8" (1) | | |
| 14 | 58B-50-01320 | SEAL - 15 1/8" (1) | | |
| 15 | 58B-50-01460 | BEARING - 10 1/8" (1) | | |
| 16 | 58B-50-01300 | SEAL - 10 1/8" (1) | | |
| 17 | 58B-50-01020 | HOUSING | | |
| 18 | 58B-50-01070 | TUBE - 14 1/8" | | |
| 19 | 58B-50-01120 | TUBE - 14 1/8" | | |
| 20 | 58B-50-01170 | ROD, PIVOT | | |
| 21 | 58B-50-01410 | BEARING - 14 1/8" (1) | | |
| 22 | 58B-50-01440 | SEAL, BUFFER - 14 1/8" (1) | | |
| 23 | 58B-50-01400 | SEAL, ROD - 14 1/8" (1) | | |
| 24 | 58B-50-01390 | SEAL, WIPER - 14 1/8" (1) | | |
| 25 | 58B-50-01380 | BEARING - 11 3/8" (1) | | |
| 26 | 58B-50-01430 | SEAL, BUFFER - 11 3/8" (1) | | |
| 27 | 58B-50-01370 | SEAL, ROD - 11 3/8" (1) | | |
| 28 | 58B-50-01360 | SEAL, WIPER - 11 3/8" (1) | | |
| 29 | 58B-50-01350 | BEARING - 7 5/8" (1) | | |
| 30 | 58B-50-01420 | SEAL, BUFFER - 7 5/8" (1) | | |
| 31 | 58B-50-01340 | SEAL, ROD - 7 5/8" (1) | | |
| 32 | 58B-50-01330 | SEAL, WIPER - 7 5/8" (1) | | |
| 33 | 58B-50-01560 | PLATE | | |
| 34 | 58B-50-01490 | SNAP RING (1) | | |
| 35 | WA1443 | RING, BACKUP (1) | | |
| 36 | WA0443 | SEAL, O-RING (1) | | |
| NS|42 | 58B-HC-AK020 | NOTE: (1) INCLUDED IN 58B-HC-AK020 REBUILD KIT. | | |
