Caterpillar part numbers starting 1W6
| 1W6033 | Cover (fastener, governor) | Caterpillar | ||
| 1W6326 | Bearing (push rods and valve lifters) | Caterpillar | ||
| 1W6935 | Sleeve (transfer pump assembly, fuel) | Caterpillar | ||
| 1W6936 | Cap (transfer pump assembly, fuel) | Caterpillar | ||
| 1W6974 | Seal group, crankshaft (crankshaft seals) | Caterpillar | ||
| 1W6977 | Seal group (crankshaft seals) | Caterpillar |