Product Specifications
| Parameter | Details |
|---|
| Part Name | 7" V-Groove Fan Pulley |
| Part Number (OEM Reference) | 3919624, 3908819, 3903221 |
| Brand Compatibility | Cummins, Hyundai |
| Machine Model Fitment | Hyundai R130W, R170W-3, R210W-9A, R430LC-9A; Hyundai wheel loaders HL730–HL960 series; Hyundai forklifts 100D–250D-7/9 series; Cummins-powered equipment with QSB6.7, ISB, 4B3.9, 6B5.9, 6C8.3 engines |
| Material | High-strength cast iron with precision-machined V-groove surface |
| Diameter | 7 inches (177.8 mm) |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual corrugated box with molded EPS foam cushioning |
Compatible Models
| Brand | Applicable Models |
|---|
| Hyundai Excavator | R130LC, R130W, R130W-3, R140W-9A, R160W-9A, R170W-3, R180LC-3, R180W-9A, R200LC, R200NLC-3, R200W, R200W-2, R200W-3, R210LC-3, R210LC-3_LL, R210W-9A, R210W9AMH, R220LC-9A, R220NLC-9A, R235LCR-9, R235LCR-9A, R280LC, R290LC, R290LC-3, R320LC-3, R330LC-9A, R380LC-9A, R430LC-9A, HX300 L, HX330 L, HX380 L, HX430L, 33HDLL, 42HDLL |
| Hyundai Wheel Loader | HL17C, HL25C, HL720-3, HL730-3, HL730-7, HL730-7A, HL730-9, HL730-9A, HL730-9S, HL730TM-3, HL730TM-7, HL730TM-7A, HL730TM-9, HL730TM-9A, HL740-3, HL740-7, HL740-7A, HL740-7S, HL740-9, HL740-9A, HL740-9B, HL740-9S, HL740TM-3, HL740TM-7, HL740TM-7A, HL740TM-9, HL740TM-9A, HL750, HL750TM, HL757-7, HL757-7A, HL757-7S, HL757-9, HL757-9A, HL757-9S, HL757-9SM, HL757TM-7, HL757TM7A, HL757TM-9, HL757TM-9A, HL760, HL760-7, HL760-7A, HL760-9, HL760-9A, HL760-9S, HL770-7, HL770-7A, HL770-9, HL770-9A, HL770-9S, HL940, HL940TM, HL955, HL955TM, HL960 |
| Hyundai Forklift | 100D-7, 120D-7, 135D-7, 160D-7, 110D-7E, 130D-7E, 140D-7E, 160D-7E, 110D-7A, 130D-7A, 160D-7A, 110D-9, 130D-9, 160D-9, 180D-7E, 250D-7E, 250D-9, HDF50A, HDF70A |
| Cummins Engine | 4B, ISBE, QSB, 4B3.9, 6B5.9, 6C8.3, B3.9 CM2620 B171C, B4.5, B5.9 G, B6.7 CM2350 B136C, B6.7 CM2670 B164C, B7 CM2670 B165C, B6.7 CM2350 B157C, B6.7 CM2450 B155B, B6.7 CM2670 B173B, C8.3 G, G5.9, G8.3, ISB CM2150, ISB6.7 CM2250, ISB6.7 CM2350 B101, QSB6.7 CM2150 B109, QSB6.7 CM2250, QSB6.7 CM2350 B105, QSB6.7 CM2350 B130 |
Tired of Fan Pulley Failures on Your R210W-9A or QSB6.7-Powered Excavator?
A single failed fan pulley can shut down an entire excavation shift — costing $2,000+ per day in idle labor, rental fees, and missed deadlines. OEM replacements take 3–4 weeks to arrive, while low-cost alternatives crack under thermal stress or slip due to poor groove geometry. With over 10 years supplying replacement pulleys to fleet operators across North America, Africa, and Southeast Asia, we know exactly where failure begins.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This 7 inch V groove pulley is manufactured in ISO 9001-certified foundries using controlled-cast iron with consistent grain structure and machined to ±0.05 mm diameter tolerance. Every unit undergoes dynamic balance testing and V-groove depth verification before shipment — ensuring immediate fit and stable belt engagement during high-load digging cycles. We stock 3919624 pulley in bulk at our Guangzhou facility, supporting urgent maintenance for Hyundai excavators and Cummins-powered equipment worldwide.
Where This Part Works
This fan pulley operates continuously under high-temperature, high-vibration conditions — from quarry blast zones to port-side container handling and tropical infrastructure projects. It drives the cooling fan assembly for QSB6.7 and ISB-series engines, maintaining optimal coolant flow when ambient temperatures exceed 45°C and engine load remains above 75% for extended periods. A misaligned or undersized pulley directly reduces airflow by up to 35%, accelerating engine overheating and cylinder head warping — especially critical on R210W-9A and R430LC-9A models deployed in mining and demolition.
Engineering Details That Matter
The V-groove profile is cut to exact SAE J472-B specification with a 34° included angle and 0.002″ surface roughness (Ra), preventing belt slippage during sudden torque spikes. Cast iron composition includes 3.2% carbon and 2.1% silicon for superior thermal fatigue resistance — verified through 500-cycle heat shock testing (200°C → ambient air). Outer diameter is held to ±0.05 mm to match OEM shaft runout tolerances, eliminating harmonic vibration at 2,200 RPM. Surface hardness reaches 220–240 HB, balancing wear resistance with impact absorption during debris ingestion common in demolition sites.
The Real Cost of Wrong Parts
A $25 counterfeit pulley may save $40 upfront but often fails within 200 operating hours — triggering secondary damage to belts, tensioners, and water pumps. Replacing those adds $320+ in parts and 6+ labor hours. Worse, unplanned downtime on a Hyundai R210W-9A averages $1,850/day in lost productivity. Our 3919624 replacement for R210W-9A meets ISO 9001 production standards and delivers 1,800+ hour service life under real-world load cycles — reducing total cost of ownership (TCO) by 41% versus non-certified alternatives over 2 years.
Why Customers Trust XUNPO
We partner exclusively with ISO 9001-certified factories and perform incoming material inspection on every batch. Each 7" V-groove fan pulley undergoes pre-shipment performance testing — including dimensional check, dynamic balance, and groove geometry scan — to guarantee OEM-equivalent functionality. All units carry a 3–12 month warranty covering manufacturing defects. With 10 years’ export experience to 120+ countries, our 20+ technical specialists verify part compatibility within 2 hours. Over 10,000 SKUs are held in ready-to-ship condition at our Guangzhou warehouse — enabling 2–5 working day dispatch for all in-stock items like this Cummins fan pulley.
Packaging & Shipping
- Individually packed in rigid corrugated box with custom-molded EPS foam to prevent transit damage
- In-stock items ship within 2–5 working days after order confirmation
- Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — selected per customer requirement
- Real-time tracking number provided upon dispatch
- MOQ is 1 piece — no minimum volume required for urgent repairs
Get Your 3919624 Replacement Pulley Now
Your excavator shouldn’t wait weeks for a fan pulley. Send us your machine model (e.g., R210W-9A), engine type (e.g., QSB6.7), and quantity — we’ll reply with a competitive quote within 24 hours. First-time buyers may request a sample for physical verification before placing bulk orders. Every hour your machine sits idle costs money; act now to resume operations.
Frequently Asked Questions
Q: Is this an original Cummins or Hyundai part?
A: No — it is an OEM-equivalent aftermarket part produced in ISO 9001-certified factories, meeting dimensional, material, and performance specifications of the original 3919624 pulley.
Q: How do I confirm this fits my specific machine?
A: Provide your full machine model (e.g., R210W-9A) and engine serial prefix (e.g., QSB6.7 CM2350 B105) — our technical team will verify compatibility and reply within 2 hours.
Q: What is the warranty period?
A: 3–12 months against manufacturing defects. If failure occurs due to material or workmanship, we replace or refund without question.
Q: What is the minimum order quantity?
A: 1 piece — ideal for emergency repairs or verifying fit before larger procurement.
Q: How fast can you ship?
A: In-stock 3919624 pulleys ship within 2–5 working days. Express options available for urgent delivery to North America, Europe, and Southeast Asia.
Q: Can I receive a sample before ordering in bulk?
A: Yes — first-time customers may request one sample unit for physical evaluation and fit-check prior to full order placement.
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
