| \0 | 21D-64-10000 | SHOWEL CONTROL VALVE, ASSY. | |
| 1 | 21D-64-11100 | PRESSURE RELIEF VALVE | |
| 2 | 21D-64-11110 | KIT, GASKET | |
| 3 | 21D-64-11200 | UNION KIT | |
| 4 | 21D-64-11210 | JOINT | |
| 5 | 21D-09-69130 | O-RING | |
| 6 | 21D-64-11140 | ANTICAVITATIION VALVE | |
| 7 | 21D-64-11150 | PLUG | |
| 8 | 21D-64-11160 | FLANGE, ASSY. | |
| 9 | 21D-64-11300 | ANTICAVITATIION VALVE | |
| 10 | 21D-64-11310 | O-RING | |
| 11 | 21D-64-11170 | TIE-ROD | |
| 12 | 01643-31232 | WASHER | |
| 13 | 01580-11210 | NUT | |
| 14 | 21D-09-54900 | PRESSURE TAKE-UP | |
| 15 | 21D-09-73160 | GASKET | |
| 16 | 21D-62-15190 | PLUG (USED ONLY WITH 1-PIECE BOOM) | |
| 17 | 21D-09-69970 | O-RING |