129900-42055 Water Pump maintains 4D94LE coolant circulation for B2B excavator parts repair, engine overhaul, replacement stock, and wholesale sourcing.
The 129900-42055 Water Pump YNF18798 is supplied for compatible 4D94LE diesel engine cooling systems. Coolant is circulated through the engine and corresponding heat-transfer components so operating heat can be moved toward the radiator and released through the cooling package.
A water pump operates continuously while the engine is running and is exposed to coolant, vibration, rotational load, and repeated thermal cycling. Leakage around the pump area, abnormal bearing noise, shaft movement, or weakened coolant circulation can indicate that replacement should be considered.
For professional B2B buyers, the 129900-42055 4D94LE water pump should be checked by part number, engine model, mounting-hole arrangement, coolant connection positions, drive-side structure, overall dimensions, and existing-pump photos. Accurate physical comparison before bulk purchasing helps reduce incorrect inventory, installation delays, customer claims, and unnecessary international return freight.
| Application | Description |
|---|---|
| 4D94LE Diesel Engine | Used in compatible engine cooling configurations |
| Coolant Circulation | Maintains coolant movement through the engine circuit |
| Engine Overhaul | Suitable for replacement during diesel engine rebuilding |
| Cooling System Repair | Can be renewed when leakage or wear is identified |
| Overheating Inspection | Pump condition can be checked during cooling diagnosis |
| Preventive Maintenance | Suitable for scheduled engine cooling service |
| Machinery Workshop | Practical for construction and industrial equipment repair |
| B2B Parts Stocking | Suitable for dealers, wholesalers, and engine parts distributors |
| Application | Description |
|---|---|
| 4D94LE Diesel Engine | Used in compatible engine cooling configurations |
| Coolant Circulation | Maintains coolant movement through the engine circuit |
| Engine Overhaul | Suitable for replacement during diesel engine rebuilding |
| Cooling System Repair | Can be renewed when leakage or wear is identified |
| Overheating Inspection | Pump condition can be checked during cooling diagnosis |
| Preventive Maintenance | Suitable for scheduled engine cooling service |
| Machinery Workshop | Practical for construction and industrial equipment repair |
| B2B Parts Stocking | Suitable for dealers, wholesalers, and engine parts distributors |
Q: Which engine is referenced?
A: The supplied engine reference is 4D94LE.
Q: What does the water pump do?
A: It circulates coolant through the compatible diesel engine cooling circuit.
Q: When should the pump be inspected?
A: Inspection is recommended when leakage, bearing noise, shaft movement, or poor coolant circulation is observed.
YNF Machinery supplies 129900-42055 water pumps and related 4D94LE engine cooling parts for machinery workshops, engine rebuilders, equipment dealers, wholesalers, fleet operators, and international importers.
The YNF18798 4D94LE water pump is a fitment-sensitive engine component. For professional buyers, the part number should be checked together with the mounting pattern, coolant-port arrangement, drive-side structure, and overall pump dimensions before quantity purchasing.
Buyers can provide the 129900-42055 reference, 4D94LE engine information, machine model, required quantity, mounting-side photos, dimensions, coolant connection details, and clear images of the removed pump for fitment checking.
Radiators, thermostats, radiator hoses, cooling fans, belts, pulleys, oil coolers, gasket sets, and other 4D94LE engine parts can also be consolidated into the same order to simplify procurement and reduce fragmented international shipping costs.
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