420109-00172 Upper Radiator Hose routes coolant through the DX300 cooling circuit for B2B excavator parts repair and wholesale stocking.
The 420109-00172 Upper Radiator Hose YNF12274 is supplied for compatible DX300 excavator engine cooling systems. It is positioned in the upper section of the coolant circuit, where heated coolant is transferred from the engine-side connection toward the radiator so accumulated heat can be released through the cooling package.
During heavy excavation work, radiator hoses are repeatedly exposed to elevated coolant temperatures, pressure cycling, vibration, and engine-compartment heat. Aging hoses can become hardened, swollen, cracked, or weakened around the clamping areas, increasing the possibility of coolant leakage and unplanned downtime.
For B2B buyers, the 420109-00172 DX300 radiator hose should be verified by part number, molded routing, hose length, bend orientation, inlet and outlet diameters, and existing-hose photos. Correct physical matching is recommended before bulk purchasing because similar molded coolant hoses may use different curves or connection sizes.
| Parameter | Specification |
|---|---|
| YNF Part Number | YNF12274 |
| Part Number | 420109-00172 |
| Product Name | Upper Radiator Hose |
| Alternative Name | Upper Coolant Hose / Radiator Top Hose / Upper Water Hose |
| Product Type | Molded Engine Cooling Hose |
| Parts Category | Excavator Cooling System Parts |
| Machine Reference | DX300 |
| Hose Position | Upper Radiator Circuit |
| Main Function | Routes Heated Coolant Toward the Radiator |
| Application | Excavator Engine Cooling System |
| Installation | Engine-to-Radiator Upper Cooling Connection |
| Working Medium | Engine Coolant |
| Fitment Check | Part Number / Shape / Length / Bend Direction / End Diameter / Existing Hose Photo |
| Quality Type | Aftermarket Replacement |
| Condition | New |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Piece |
| Shipping Method | Air, Sea, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application | Description |
|---|---|
| DX300 Excavator | Used in compatible engine cooling configurations |
| Upper Cooling Circuit | Carries heated coolant toward the radiator |
| Radiator Service | Can be renewed when the radiator is removed or replaced |
| Coolant Leak Repair | Suitable when cracking, swelling, or leakage is found |
| Cooling System Overhaul | Used during broader coolant circuit restoration |
| Hose Preventive Maintenance | Suitable for inspection during scheduled machine service |
| Fleet Maintenance | Practical for excavators operating long working cycles |
| B2B Parts Stocking | Suitable for wholesalers, dealers, and repair suppliers |
Q: Which machine is referenced?
A: The supplied machine reference is DX300.
Q: What is the main function of the hose?
A: It routes coolant through the upper section of the engine cooling circuit toward the radiator.
Q: What should be checked before ordering?
A: Part number, machine model, hose shape, bends, end diameters, length, and existing-part photos should be verified.
YNF Machinery supplies 420109-00172 upper radiator hoses and related DX300 cooling-system parts for excavator repair workshops, fleet operators, dealers, wholesalers, and international importers.
The YNF12274 upper coolant hose is a molded, fitment-sensitive replacement component. For B2B buyers, the reference number should be checked together with the hose routing, bend positions, connection diameters, and overall dimensions before quantity purchasing.
Professional buyers can provide the 420109-00172 part number, DX300 machine information, required quantity, hose-end measurements, installation photos, and clear images of the removed hose for fitment confirmation.
Radiators, lower coolant hoses, coolant tanks, radiator caps, thermostats, water pumps, cooling fans, and other DX300 cooling-system parts can also be consolidated into the same inquiry, helping distributors simplify procurement and reduce fragmented international shipping costs.
