| IR 231H Model A and 231H-2 Parts List |
| Item | PartNumber | PartDescription | IREquivalent |
| 1 |
| Motor Housing | 231HP-B40 |
| 2 | 9599 | Throttle Valve Seat | 131-303 |
| 3 |
| Warning Label | WARNING-2-99 |
| 4 |
| Grease Fitting | 130SR-188 |
| 5 |
| Reverse Valve Bushing | 231-A330 |
|
| Bushing | --- |
| 6 | 8400 | Seal | PS3-67 |
| 7 |
| Reverse Valve | 231-329A |
| 8 | 8282 | Reverse Valve Detent Ball | AV1-255 |
| 9 | 9597 | Reverse Valve Detent Spring | 131-664 |
| 10 | 9441 | Reverse Valve Knob | 131-666 |
| 11 | 9440 | Reverse Valve Screw | 231-665 |
| 12 | 9621 | Inlet Bushing | 131-565 |
| 13 |
| Exhaust Deflector | 131-23 |
| 14 | 8665 | Throttle Valve Spring | 231G-51 |
| 15 | 8666 | Throttle Valve | 235-50 |
| 16 |
| Nameplate | 231HA-301 |
| 17 | 9248
| Trigger | 231H-A93 |
| 18 |
| Trigger Retainer | 231HP-656 |
| 19 | 8032B | End Plate Gasket | 231-283 |
| 20 | 8004
| Rear Rotor Bearing Retainer | 402-118 |
| 21 | 8027 | Rear Rotor Bearing | 402-22 |
| 22 | 8085 | Rear End Plate | 231-12 |
| 23 | 8263 | Rotor | 231-53 |
| 24 | 2189 | Vane (Set of 6 Vanes) | 2131-42-6 |
| 25 |
| Cylinder | 231XP-3 |
| 26 | 8084 | Front End Plate | 231-11 |
| 27 | 8340 | Cylinder Dowel | 230-98 |
| 28 | 8028 | Front Rotor Bearing | 4U-97 |
| 29 | 8311 | Motor Clamp Washer (2) | 227-207 |
| 30 | 8087 | Hammer Frame Washer | 231-706 |
| 31 |
| Hammer Frame Kit | 231XP-A703 |
| 32 | 8079 | Hammer Pin (2) | 231-704 |
| 33 |
| Hammer (2) | 231XP-724 |
| 34 |
| Anvil Assembly |
|
| 8021 | 231H Model A | 231B-A626 |
| 8022 | 231H-2 Model A (2” Extended Anvil) | 231B-A414 |
| 35 | 8270 | Retainer O-Ring | R1A-159 |
| 36 | 8088 | Socket Retainer | 231-425A |
| 37 |
| Hammer Case Assembly | 131-A727-70 |
| 38 | 8032A | Hammer Case Gasket | 230-36 |
| 39 | 8312 | Hammer Case Pilot | 405-800 |
| 40 | 8320 | Hammer Case Bushing | 705-941 |
| 41 | 9282 | Hammer Case Cap Screw (3) | 131-638 |
| 42 | 9281 | Hammer Case Lock Washer (3) | 131-637 |
| 43 |
| Grease Gun | 230-228 |
| 44 |
| Oil | 405-M01 |
| 45 |
| Grease | 105-4T |
| 9985 | Tune Up Kit(Includes: 2, 6[2], 8, 9, 14, 15, 19, 20, 21, 24,28, 35, 36, and 38) | 231HP-TK1 |
| 9987 | Hammer Kit (for231H Model A StandardLength) (includes: 33[2], 34, 38, 41[3], and 42[3]) | 231B-THK1 |
| 9981 | Hammer Kit (for231H Model A ExtendedLength) (includes items 33[2], 34, 38, 41[3], and 42[3]) | 231B-THK2 |
|
| Reverse ValveKit (includes: 7, 8, 9,10, and 11) | 231-329A-TK |
