Product Specifications
| Parameter | Details |
|---|
| Part Name | Belt Tensioner |
| Part Number (OEM Reference) | 3936202, 3917485, 3918944, 3934817, 3936203, 3967188, 3964636 |
| Brand Compatibility | Cummins, Hyundai |
| Machine Model Fitment | Hyundai R130LC-3, R130W-3, R140LC-7, R160LC-3, R170W-3, R180LC-3, R200NLC-3, R200W, R200W-2, R200W-3, R210LC-3, R210LC-3_LL, R210LC-7, R250LC-3, 33HDLL |
| Engine Compatibility | Cummins 4BT, 6BT, 4B3.9, 6B5.9, 6C8.3, B4.5, QSL9 CM554, NH/NT 855, QSB6.7 CM850(CM2850), C8.3 G |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual protective packaging with foam insert and branded carton |
Compatible Models
| Brand | Applicable Models |
|---|
| Hyundai | R130LC-3, R130W-3, R140LC-7, R160LC-3, R170W-3, R180LC-3, R200NLC-3, R200W, R200W-2, R200W-3, R210LC-3, R210LC-3_LL, R210LC-7, R250LC-3, 33HDLL |
Tired of Engine Belt Slippage and Premature Failure on Your Hyundai Excavator? Get the Right Cummins Belt Tensioner for R210LC-7 and R180LC-3
Every hour your excavator sits idle due to belt misalignment or tension loss costs hundreds — sometimes thousands — of dollars in lost productivity. Counterfeit or low-grade tensioners fail within weeks, causing pulley wear, alternator drop-out, and overheating in high-duty cycles. OEM replacements from Hyundai or Cummins take 3–4 weeks to arrive and cost up to 45% more than necessary — delaying critical maintenance during peak project windows.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This Cummins belt tensioner is manufactured in ISO 9001-certified facilities and undergoes pre-shipment functional testing for consistent spring force, pivot smoothness, and mounting alignment — matching original equipment performance. Designed specifically for heavy-duty engine bays in Hyundai excavators like the R210LC-7 and R180LC-3, it maintains optimal belt deflection under continuous load during digging, lifting, and travel operations. With 10 years’ experience supplying replacement parts to repair centers across North America, Africa, and Southeast Asia, XUNPO ensures technical accuracy before dispatch — no guesswork, no delays.
Where This Part Works
This tensioner operates under sustained thermal cycling (–20°C to +110°C) and vibration-heavy conditions typical in construction sites, quarries, and port terminals. It directly supports engine-driven accessories — including air compressors, hydraulic pumps, and cooling fans — where even 2mm of belt sag can reduce drive efficiency by 8% and increase bearing wear by 3×. Used widely on Hyundai machines powered by Cummins 4B3.9 and 6BT engines, it’s engineered for reliability in dusty, humid, and high-load environments where downtime is not an option.
Engineering Details That Matter
Forged steel bracket structure provides 2.3× higher fatigue resistance than cast alternatives, critical for long-term stability under repeated torque spikes. Precision-ground pivot pin ensures ≤0.05 mm radial runout — eliminating premature bushing wear and noise. High-tensile spring with calibrated 125 N·m initial force maintains ±1.5 mm belt deflection tolerance across 100,000 km of operation. Zinc-nickel electroplated surface finish meets ISO 9227 salt-spray standards for 720+ hours — essential for coastal or mining applications. Dimensional tolerances held to ±0.1 mm guarantee full interchangeability with OEM mounting points and pulley alignment.
The Real Cost of Wrong Parts
A $35 counterfeit tensioner may save upfront but often fails within 300 operating hours — triggering cascading damage: misaligned belts shred alternator belts, overheat water pumps, and overload AC compressors. Repair labor alone averages $180/hour; a single unscheduled engine bay service due to tension failure adds $1,200–$2,500 in direct cost. Worse, delayed projects incur contractual penalties — up to $5,000/day in infrastructure contracts. This Cummins 4BT tensioner delivers verified total cost of ownership (TCO) reduction: 3–12 month warranty covers manufacturing defects, and its ISO-compliant production ensures predictable life expectancy aligned with OEM service intervals.
Why Customers Trust XUNPO
Only ISO 9001-certified factories supply our tensioners — every batch undergoes incoming material inspection for alloy composition and hardness. Each unit is tested for spring load consistency, pivot rotation torque, and mounting bolt torque retention before shipment. We offer 3–12 month warranty covering replacement or refund for any manufacturing defect — no questions asked. With 10 years exporting to 120+ countries, our team has verified over 28,000 part-machine combinations. Our 20+ technical specialists confirm compatibility within 2 hours using OEM service manuals and real-world fitment data. Over 10,000 SKUs are held in stock at our Guangzhou warehouse — enabling 2–5 working day dispatch for in-stock items like this Cummins 6BT engine tensioner.
Packaging & Shipping
- Individually packed in rigid cardboard box with molded EPE foam cradle and anti-corrosion VCI paper
- In-stock items ship within 2–5 working days after payment confirmation
- Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — all with tracking
- Real-time logistics updates provided from warehouse to destination port or door
- MOQ is 1 piece — supporting urgent field repairs and small fleet operators
Get Your Cummins Belt Tensioner Now
Your excavator’s engine depends on precise belt tension — delay means extended downtime, compounding losses. Send us your machine model (e.g., R210LC-7), engine type (e.g., Cummins 4B3.9), and required quantity — we’ll reply with a competitive quote within 24 hours. First-time buyers can request a sample for physical verification before bulk order. With stock ready in Guangzhou, your replacement arrives faster than waiting for OEM lead times.
Frequently Asked Questions
Q: Is this an original Cummins or Hyundai OEM part?
A: No — it is an OEM-equivalent aftermarket part produced in ISO 9001-certified factories to match original specifications for fit, form, and function.
Q: How do I confirm this fits my specific machine?
A: Provide your exact model number (e.g., R180LC-3) and engine code (e.g., Cummins 6BT). Our technical team verifies compatibility using OEM service data and responds within 2 hours.
Q: What is your warranty policy?
A: 3–12 months against manufacturing defects. If failure occurs due to material or workmanship, we replace or refund — no restocking fees.
Q: What is the minimum order quantity?
A: 1 piece — designed for urgent maintenance needs and small-volume buyers.
Q: How fast can you ship?
A: In-stock items ship within 2–5 working days. Express courier delivery typically reaches North America/Europe in 4–7 days, Southeast Asia in 2–3 days.
Q: Can I receive a sample before placing a bulk order?
A: Yes — first-time customers may request a sample for physical evaluation and fitment testing.
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
