| Item | Part No. | Part Name | Qty | Serial No. |
| 23S-P64-1720 | RETARDER ASS'Y | 53001-@ | ||
| 1 | 23S-P64-2110 | DRUM ASS'Y | 53001-53075 | |
| 2 | 23S-P64-1730 | FLANGE | 53001-@ | |
| 3 | 23S-P64-1750 | FLANGE | 53001-@ | |
| 4 | 23S-P64-2120 | HOUSING | 53001-@ | |
| 5 | 23S-P64-2130 | BEARING | 53001-@ | |
| 6 | 23S-P64-2140 | BEARING | 53001-@ | |
| 7 | 23S-P64-2150 | SLEEVE | 53001-@ | |
| 8 | 23S-P64-2160 | BOLT | 53001-@ | |
| 9 | 23S-P64-2170 | O-RING | 53001-@ | |
| 10 | 23S-P64-2180 | SEAL | 53001-@ | |
| 11 | 23S-P64-2190 | SHAFT | 53001-53075 | |
| 12 | 23S-P64-2210 | NUT | 53001-@ | |
| 13 | 23S-P64-2220 | FITTING,GREASE | 53001-@ | |
| 14 | 23S-P64-2230 | CONNECTOR | 53001-@ | |
| 15 | 23S-P64-2240 | PIPE | 53001-@ | |
| 16 | 23S-P64-2250 | PIPE | 53001-@ | |
| 17 | 23S-P64-2260 | CLAMP | 53001-@ | |
| 18 | 23S-P64-2270 | BOLT | 53001-@ | |
| 19 | 23S-P64-2280 | BRACKET ASS'Y | 53001-53075 | |
| 20 | 23S-P64-2290 | COVER | 53001-53075 | |
| 21 | 23S-P64-2310 | BOLT | 53001-53075 | |
| 22 | 23S-P64-2320 | GROMMET | 53001-53075 | |
| 23 | 23S-P64-2330 | BOLT | 53001-53075 | |
| 24 | 23S-P64-2340 | NUT | 53001-53075 | |
| 25 | 23S-P64-2350 | BAND | 53001-53075 | |
| 26 | 23S-P64-2360 | TUBE | 53001-53075 | |
| 27 | 23S-P64-2370 | TUBE | 53001-53075 | |
| 28 | 23S-P64-2380 | TUBE | 53001-53075 | |
| 29 | 23S-P64-2390 | WIRE ASS'Y | 53001-53075 | |
| 30 | 23S-P64-2410 | WIRE ASS'Y | 53001-53075 | |
| 31 | 23S-P64-2420 | WIRE ASS'Y | 53001-53075 | |
| 32 | 23S-P64-2430 | GREASE,(NOT SHOWN) | 53001-@ |