Product Specifications
| Parameter | Details |
|---|
| Part Name | Fan Pulley |
| Part Number (OEM Reference) | 3914458 |
| Brand Compatibility | Cummins |
| Engine Fitment | ISB, QSB, 6CTA, ISC, QSC, 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.9 G, G5.9, G5.9 CM558, ISB CM550, ISB CM850, ISBE CM800, ISBE4 CM850, QSB4.5 CM850 (CM2850) |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual retail box with anti-rust coating and foam padding |
Compatible Models
| Brand | Applicable Models |
|---|
| Cummins | ISB, QSB, 6CTA, ISC, QSC, 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.9 G, G5.9, G5.9 CM558, ISB CM550, ISB CM850, ISBE CM800, ISBE4 CM850, QSB4.5 CM850 (CM2850) |
Tired of Fan Pulley Failures on Cummins ISB and QSB Engines?
Every unscheduled downtime caused by a cracked or misaligned fan pulley costs operators thousands in lost productivity — especially during peak construction or mining seasons. OEM replacement pulleys often take 3–4 weeks to arrive, while low-cost alternatives wear out 1.5× faster and risk belt slippage or engine overheating. Finding one trusted source for all Cummins ISB, QSB, and 6CTA engine pulleys has been nearly impossible — until now.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This fan pulley 3914458 is engineered to match original Cummins specifications — manufactured in ISO 9001-certified facilities, tested for concentricity, balance, and torque load before shipment. With 10 years of global export experience and over 10,000 SKUs in stock, XUNPO supplies verified replacement fan pulley for Cummins ISB engines directly to repair shops, fleet managers, and equipment operators across North America, Africa, and Southeast Asia — without waiting for OEM lead times.
Where This Part Works
This fan pulley operates under continuous thermal cycling and high-vibration conditions in heavy-duty applications: excavator cooling systems on construction sites, generator sets at remote mining camps, marine auxiliary engines in port logistics, and agricultural machinery in high-temperature field operations. Correct pulley alignment and material integrity are critical — any runout or imbalance accelerates water pump bearing wear and triggers cascading cooling failures.
Engineering Details That Matter
Forged steel construction ensures dimensional stability across operating temperatures from –25°C to +120°C. Surface hardness of HRC 38–42 prevents groove deformation under constant V-belt tension. Precise bore tolerance (H7) guarantees press-fit compatibility with original crankshaft snouts. Dynamic balancing to G6.3 level eliminates harmonic vibration that damages front engine seals. Anti-corrosion black oxide finish withstands salt-spray exposure common in coastal and quarry environments.
The Real Cost of Wrong Parts
A $40 counterfeit fan pulley may save short-term cost — but causes misalignment-induced water pump failure within 300 operating hours, requiring $1,200+ in labor and parts. Cummins service manuals specify strict runout limits (<0.05 mm); non-compliant pulleys trigger premature thermostat and radiator degradation. Total cost of ownership (TCO) favors certified aftermarket parts: our fan pulley 3914458 delivers 10,000+ hour service life under ISO 45001-aligned production controls — matching OEM durability at 35% lower acquisition cost.
Why Customers Trust XUNPO
Only ISO 9001-certified factories supply our fan pulleys — each batch undergoes incoming material inspection for alloy composition and tensile strength. Every unit passes pre-shipment performance testing for radial runout, surface finish, and static/dynamic balance. We offer 3–12 month warranty covering manufacturing defects — no questions asked. Our 10-year export track record includes repeat orders from 120+ countries. A dedicated technical team verifies part fitment within 2 hours using OEM service bulletins and engine serial decoding. Over 10,000 SKUs — including this Cummins ISB fan pulley — are held in ready-to-ship inventory at our Guangzhou warehouse.
Packaging & Shipping
- Individually boxed with custom-molded EPE foam and rust-inhibiting VCI paper
- In-stock items ship within 2–5 working days after payment confirmation
- Flexible logistics: DHL/FedEx/UPS express, air freight, or sea freight options
- Real-time tracking number provided upon dispatch
- MOQ: 1 piece — designed for urgent maintenance needs
Get Your Fan Pulley 3914458 Now
Your excavator or generator isn’t generating revenue while it’s idle — every hour counts. Send us your machine model, engine serial prefix, and required quantity, and receive a competitive quote within 24 hours. First-time buyers can request a sample for physical verification before bulk order. Stock is available today; shipping starts tomorrow.
Frequently Asked Questions
Q: Is this an original Cummins part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket fan pulley 3914458, produced in ISO 9001-certified factories to meet Cummins engineering tolerances and material specifications.
Q: How do I confirm if this fits my specific Cummins engine?
A: Provide your engine model (e.g., QSB4.5 CM850), serial number prefix, and application — our technical team confirms compatibility within 2 hours using official Cummins service data.
Q: What is the warranty period?
A: 3–12 months against manufacturing defects. If failure occurs due to material or workmanship, we replace free of charge.
Q: What is the minimum order quantity?
A: 1 piece — no minimum. Ideal for emergency repairs or small workshops.
Q: How long does shipping take?
A: In-stock items ship within 2–5 working days. Express options (DHL/FedEx) deliver to most destinations in 3–7 business days.
Q: Can I request a sample before placing a bulk order?
A: Yes — first-time customers may request one sample for testing. Sample fee is refundable against the first bulk order.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 13316055942 | Email: talos@xunpojx.com
