| Item | Part No. | Part Name | Qty | Serial No. |
| 561-35-62203 | RETARDER VALVE ASS'Y | 4001- | ||
| 1 | \6\ | BODY | 4001- | |
| \6\ | VALVE ASS'Y (K16) | 4001- | ||
| 2 | \6\ | VALVE | 4001- | |
| 3 | \6\ | STEM | 4001- | |
| 4 | \6\ | SPRING | 4001- | |
| 5 | \6\ | GUIDE | 4001- | |
| 6 | 566-35-16180 | BOLT | 4001- | |
| 7 | 566-35-16191 | WASHER | 4001- | |
| 8 | 566-35-16210 | SPRING | 4001- | |
| 9 | 566-35-16220 | PISTON | 4001- | |
| 10 | \6\ | O-RING (K16) | 4001- | |
| 11 | \6\ | COVER | 4001- | |
| 12 | \6\ | CAM (K16) | 4001- | |
| 13 | \6\ | CAM (K16) | 4001- | |
| 14 | 566-35-16272 | SPRING | 4001- | |
| 15 | \6\ | GASKET (K16) | 4001- | |
| 16 | 566-35-16310 | RING | 4001- | |
| 17 | 566-35-16320 | WASHER | 4001- | |
| 18 | 566-35-16330 | CLAMP | 4001- | |
| 19 | 566-35-16341 | BOLT | 4001- | |
| 20 | 566-35-16350 | WASHER | 4001- | |
| 21 | \6\ | O-RING (K16¤K32) | 4001- | |
| 22 | 561-35-62221 | LEVER SUB ASS'Y (K32) | 4001- | |
| 23 | 566-35-16430 | SPACER | 4001- | |
| 24 | 566-35-16441 | SCREW (K32) | 4001- | |
| 25 | 566-35-19121 | PLUNGER (K32) | 4001- | |
| 26 | 566-35-19131 | SPRING (K32) | 4001- | |
| 27 | 561-35-62230 | CASE (K32) | 4001- | |
| 28 | 561-35-62240 | NUT (K32) | 4001- | |
| 29 | 566-35-19182 | PLATE (K32) | 4001- | |
| 30 | 566-35-19190 | BOLT (K32) | 4001- | |
| 31 | 566-35-19210 | NUT (K32) | 4001- | |
| 32 | 566-35-19220 | WASHER (K32) | 4001- | |
| 33 | 281-35-19590 | CONNECTOR | 4001- |