Komatsu 490B-42100 - Water Pump
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A water pump circulating coolant through the engine and radiator on Komatsu lift trucks.
Key details
- Circulates coolant through the block, head and radiator
- Seal and bearing are the usual failure points
- Weeping from the telltale hole means the seal has failed
- Fit a new gasket and correct belt tension on installation
Specifications
| Part number | 490B-42100 |
| Component type | Water pump |
| Part type | OEM-grade aftermarket |
| Fits brand | Komatsu |
| Category | Industrial Forklifts |
Where it is used
Components of this type are fitted to the cooling system on Komatsu lift trucks. This is category-level context, not a fitment list — confirm the part number against your machine's model and serial number before ordering.
Service notes
Replace coolant and check belt tension when fitting. An overtight belt is the most common cause of premature water pump bearing failure.
Fitment & availability
This is an OEM-grade aftermarket replacement manufactured to OE specification. It is cross-referenced to Komatsu part number 490B-42100 for identification and is not supplied by the original equipment manufacturer.
Check the part number against your model and serial number before ordering. If this item is not showing as available, use Check Availability and our team will confirm lead time and fitment.