| Item | Part No. | Part Name | Qty | Serial No. |
| | SERIAL NO. IN ( ) INDICATES TRANSMISSION SERIAL NO. | | |
| (175-15-01221) | TRANSMISSION ASS'Y | | 31303-31563 |
| | THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.F2320-51A1 TO F2320-63A1. | | |
| (15A-15-15003) | VALVE ASS'Y | | 31303-@ |
| | THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.F2320-59A1 AND F2320-60A1. | | |
| 1 | 155-15-15410 | BODY | | 31303-@ |
| 2 | 07042-80108 | PLUG | | 31303-@ |
| 3 | 155-15-15850 | COVER | | 31303-@ |
| 4 | 07000-73040 | O-RING (K3) | | 31303-@ |
| 5 | 01010-81025 | BOLT | | 31303-@ |
| 6 | 01643-31032 | WASHER | | 31303-@ |
| 7 | 145-14-43382 | VALVE | | 31303-@ |
| 8 | 130-09-15170 | RING | | 31303-@ |
| 9 | 145-14-23180 | STOPPER | | 31303-@ |
| 10 | 175-15-15550 | VALVE | | 31303-@ |
| 11 | 180-14-25560 | SPRING | | 31303-@ |
| 12 | 195-15-15130 | VALVE | | 31303-@ |
| 13 | 145-14-43333 | VALVE | | 31303-@ |
| 14 | 145-14-43340 | SEAT | | 31303-@ |
| 15 | 145-14-33450 | WASHER | | 31303-@ |
| 16 | 145-14-33351 | SPRING | | 31303-@ |
| 17 | 145-14-33430 | SPRING | | 31303-@ |
| 18 | 145-14-43370 | SHIM, 0.5MM (K3) | | 15686-@ |
| 19 | 145-14-33420 | SPRING | | 31303-@ |
| 20 | 144-15-25330 | COVER | | 31303-@ |
| 21 | 01010-81025 | BOLT | | 31303-@ |
| 22 | 01643-31032 | WASHER | | 31303-@ |
| 23 | 155-15-15321 | SPOOL | | .-@ |
| 23 | 155-15-15320 | SPOOL | | 31303-. |
| 24 | 155-15-15362 | STOPPER | | .-@ |
| 24 | 155-15-15360 | STOPPER | | 31303-. |
| 25 | 04065-03515 | RING | | 31303-@ |
| 26 | 155-15-15351 | SLEEVE | | 31303-@ |
| 27 | 175-15-45381 | VALVE | | 31303-@ |
| 28 | 568-15-15570 | VALVE | | 31303-@ |
| 29 | 180-14-25560 | SPRING | | 31303-@ |
| 30 | 198-15-15760 | VALVE | | 31303-@ |
| 31 | 234-15-15230 | SPRING, (L= 52.0) | | 31303-@ |
| 32 | 103-15-15480 | SHIM, 0.5MM (K3) | | (29746)-@ |
| 33 | 103-15-15510 | SHIM, 0.2MM (K3) | | (29746)-@ |
| 34 | 01643-30623 | WASHER | | 31303-@ |
| 35 | 175-15-45390 | RETAINER | | 31303-@ |
| 36 | 04065-03515 | RING | | 31303-@ |
| 37 | 155-15-15370 | BOLT | | 31303-@ |
| 38 | 175-15-45180 | BOLT | | 31303-@ |
| 39 | 01011-81005 | BOLT | | 31303-@ |
| 40 | 01643-31032 | WASHER | | 31303-@ |
