YNF17478 15531-72870 coolant bypass hose for excavators, reinforced design ensures stable coolant circulation.
OEM-matched replacement for 15531-72870
Heat- and coolant-resistant rubber construction
Ensures stable coolant bypass flow for engine temperature control
Designed to withstand vibration, thermal cycling, and coolant corrosion
Reliable supply and quality—ideal for B2B distributors and maintenance shops
The YNF17478 coolant bypass hose (15531-72870) is used in excavator engine cooling systems to guide coolant through auxiliary channels, helping regulate temperature and maintain smooth engine operation. Bypass hoses are critical in preventing overheating during warm-up cycles and ensuring uniform coolant flow when the thermostat is closed or partially open.
Constructed from high-temperature, coolant-resistant reinforced rubber, this hose withstands continuous exposure to pressure, vibration, and heat. The precise OEM-matched curvature and diameter ensure secure sealing and leak-free performance.
Replacing a hardened, swollen, or cracked bypass hose helps avoid coolant loss, overheating, and engine damage. YNF aftermarket hoses deliver stable performance, competitive pricing, and consistent availability—making them a reliable choice for wholesalers, repair workshops, and fleet operators maintaining large excavator fleets.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17478 |
| OEM Number | 15531-72870 |
| Product Type | Coolant Bypass Hose / Water Hose |
| Application | Excavator engine cooling system |
| Material | Reinforced heat-resistant rubber |
| Function | Circulates coolant through bypass path |
| Resistance | Heat, coolant corrosion, vibration, pressure |
| Installation Position | Engine cooling bypass circuit |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Pieces |
| Shipping | Sea, Air, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Coolant Bypass Circuit | Maintains coolant flow during warm-up or thermostat control |
| Engine Cooling System | Supports stable temperature regulation |
| Routine Maintenance | Replacement for old or leaking bypass hoses |
| Aftermarket Distribution | Suitable for parts sellers and repair service providers |
Related Products:
YNF17197 4D105 Bypass Hose
YNF17342 Upper Radiator Hose
YNF17196 Lower Radiator Hose
Excavator Cooling Hose & Bypass Hose Series
FAQs:
Q: Is YNF17478 compatible with OEM 15531-72870?
A: Yes, it is designed as a direct-fit replacement.
Q: What causes bypass hoses to fail?
A: Heat aging, coolant chemical corrosion, and vibration fatigue.
Q: What symptoms show a bypass hose needs replacement?
A: Coolant seepage, cracking, bulging, or engine overheating.
The YNF17478 15531-72870 bypass hose ensures stable coolant flow in excavator engines, supporting efficient temperature control and preventing overheating. Made from reinforced, heat-resistant rubber, it offers long service life even in harsh working environments. With dependable quality, consistent stock, and competitive pricing, YNF is a trusted supplier for distributors, maintenance shops, and equipment owners. Contact us now for pricing and bulk order support.
