Caterpillar part numbers starting 1W2
| 1W2133 | Housing assembly (drive, governor) | Caterpillar | ||
| 1W2421 | Dowel (push rods and valve lifters) | Caterpillar | ||
| 1W2422 | Shaft assembly (push rods and valve lifters) | Caterpillar | ||
| 1W2639 | Adapter (expansion tank, water) | Caterpillar | ||
| 1W272 | Cover assembly (pump assembly, oil) | Caterpillar | ||
| 1W2884 | Housing assembly (priming pump and filter) | Caterpillar | ||
| 1W2963 | Housing assembly (filter, oil) | Caterpillar |