| SERIAL NO. 80199 INDICATES D21A-7. THE OTHER MACHINES ARE AS FOLLOWS. |
| D20A-7 = 80089 |
| D20A-7B = 80060 |
| D21A-7B = 80143 |
| CYLINDER,L.H. |
| O-RING |
| RING |
| PISTON |
| SPRING¤ (L= 52.0) |
| PLUG |
| O-RING |
| BOLT |
| WASHER |
| CYLINDER,R.H. |
| O-RING |
| RING |
| PISTON |
| SPRING¤ (L= 52.0) |
| PLUG |
| O-RING |
| BOLT |
| WASHER |