The Isuzu 4JB1 is a 3.06 L 4-cylinder 4 cycle water-cooled inline configuration engine rated at 1800 rpm, producing up to 34.38 kW. It powers generator sets from Commpac, including the ML27.5INRD.
Part of the Isuzu 4JB1 engine family — 2 variants share parts & fitment.
| Displacement | 3.059 L |
|---|---|
| Cylinders | 4 |
| Aspiration | 4 cycle water-cooled inline configuration |
| Rated speed | 1800 rpm |
| Gross power | 34 kW |
| Part # | Description | Category |
|---|---|---|
| 044HU103 | Hub & Rotor Assembly | other_service |
| 044TR115-16X | Tie Rod Assembly | other_service |
| 22404X | Gear & Pinion Assembly | other_service |
| 25806X | Case - Differential Assembly | other_service |
| 4313904 | Backing Plate - Right Hand | other_service |
| 4313905 | Backing Plate - Left Hand | other_service |
| 706031X | Slinger - Pinion Oil Inner | other_service |
| 706032X | Differential Bearing & Race Kit | other_service |
| A-TT4-00116 | Leaf Spring | other_service |
| A-TT4-00361 | Rear Axle Assembly | other_service |
| 39118 | Oil Seal | seal |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
The Isuzu 4JB1 has a displacement of 3.059 liters with 4 cylinders.
The Isuzu 4JB1 powers 1 generator set(s), including Commpac ML27.5INRD.