| 1W4004 | Shaft assembly (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4006 | Casing (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4007 | Poppet (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4009 | Valve assembly (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4010 | Plate assembly (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4057 | Pump, fuel injection (injectors, fuel) | Caterpillar | | |
| 1W4121 | Bracket assembly (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4123 | Seal (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4124 | Seal (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4188 | Retainer assembly (engine block) | Caterpillar | | |
| 1W4235 | Lifter assembly (push rods and valve lifters) | Caterpillar | | |
| 1W4655 | Spring (transfer pump assembly, fuel) | Caterpillar | | |
| 1W4800 | Rod assembly (pistons and connecting rods) | Caterpillar | | |
| 1W4923 | Guard assembly (vibration damper and guard) | Caterpillar | | |
| 1W4955 | Spacer (aftercooler) | Caterpillar | | |