YNF17403 6251-21-6542 oil hose for PC400, reinforced engine oil line ensuring stable lubrication flow.
OEM-Compatible Replacement：Fits Komatsu PC400 / 6251-21-6542
Material：Oil-resistant synthetic rubber with reinforced structure
Function：Delivers engine oil for lubrication and cooling
Durability：Resistant to oil corrosion, vibration, heat, and pressure
B2B Advantage：Stable quality, competitive pricing, reliable supply for distributors
The YNF17403 oil hose (6251-21-6542) is built for the Komatsu PC400 excavator engine lubrication circuit. Engine oil must circulate continuously to lubricate bearings, pistons, camshafts, and other precision components; therefore, a dependable oil hose is crucial for maintaining engine health and operational efficiency.
Manufactured with oil-resistant, heat-resistant synthetic rubber and reinforced internal layers, this hose withstands pressure fluctuations, engine vibration, and long-term exposure to high-temperature engine oil. The OEM-matched structure ensures leak-free connection and proper routing, preventing oil starvation and reducing mechanical wear.
Replacing worn or hardened hoses with YNF17403 helps maintain stable lubrication, extend engine service life, and avoid costly downtime. YNF provides reliable aftermarket hoses trusted by equipment distributors, repair workshops, and fleet operators for their durability and consistent availability.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17403 |
| OEM Number | 6251-21-6542 |
| Product Type | Oil Hose / Engine Lubrication Hose |
| Machine Model | Komatsu PC400 |
| Material | Oil-resistant reinforced rubber |
| Function | Transfers lubrication oil to engine components |
| Resistance | Oil, heat, vibration, pressure, aging |
| Application | Engine lubrication system |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Pieces |
| Shipping | Sea, Air, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Engine Lubrication System | Transfers engine oil to lubrication points |
| Excavator Maintenance | Replacement for aged or leaking oil hoses |
| Engine Cooling Support | Helps reduce friction and heat in engine parts |
| Aftermarket Supply Chain | Suitable for wholesalers & repair service shops |
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YNF17276 14881639 Hydraulic Hose
YNF17388 CAT 5I-8045 Steel Tube
Excavator Lubrication & Oil Line Hose Series
FAQs:
Q: Is YNF17403 compatible with Komatsu PC400?
A: Yes, it replaces OEM 6251-21-6542 with matched dimensions.
Q: What material is used?
A: Oil-resistant synthetic rubber with reinforced layers.
Q: How often should oil hoses be replaced?
A: Whenever they show signs of hardening, cracking, or oil seepage.
The YNF17403 6251-21-6542 oil hose ensures stable lubrication flow for Komatsu PC400 excavators, protecting the engine against excessive wear and overheating. Built from reinforced oil-resistant rubber, it offers long service life and excellent sealing performance. YNF provides stable supply, competitive wholesale pricing, and strict quality control—making it a trusted choice for distributors, repair shops, and fleet owners. Contact us today for bulk pricing and technical support.
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