<p>Keep your Cummins 4BT/6BT engine and Hyundai R130LC-3/R210LC-7 excavator running at peak efficiency with this reliable <strong>Belt Tensioner 3936202</strong>. Precision-engineered to maintain optimal belt tension, it prevents slippage and premature wear, ensuring your equipment stays productive when you need it most.</p><ul><li>Direct replacement for OEM part numbers 3936202, 3917485, and others—guaranteed fit for Cummins 4B3.9, 6B5.9, and Hyundai models including R210LC-7</li><li>High-torque spring mechanism maintains consistent tension even under heavy load, reducing downtime from belt-related failures</li><li>Constructed with heat-resistant materials to withstand the extreme operating conditions of construction and mining environments</li></ul>
| Parameter | Details |
|---|---|
| Part Name | Belt Tensioner |
| Replacement Part Number | 3936202, 3917485, 3918944, 3934817, 3936203, 3967188, 3964636 |
| Compatible Engine Brand | Cummins |
| Engine Models | 4BT, 6BT, 4B3.9, 6B5.9, 6C8.3, C GAS PLUS CM556, C8.3 G, NH/NT 855, B4.5, QSB6.7 CM850(CM2850), QSL9 CM554 |
| Compatible Machine Brand | Hyundai |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Brand | Applicable Models |
|---|---|
| Hyundai | 33HDLL, 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, R130LC3, R130W3, R160LC3, R170W3, R180LC3, R200NLC3, R200W2, R200W3, R210LC3, R210LC3LL, R210LC7, R250LC3 |
Construction sites can't afford downtime—especially when a failed belt tensioner halts your Hyundai R130LC-3 or R210LC-7 mid-shift. Many operators face the same nightmare: OEM parts take 2–4 weeks to arrive and cost 30–50% more, while cheap counterfeits wear out 1.5x faster, causing repeated breakdowns. When your excavator's Cummins 4BT or 6BT engine needs a replacement, you need a part that fits perfectly and ships immediately.
Our Belt Tensioner 3936202 and 3917485 solves these frustrations. As a 10-year professional supplier with ISO-certified manufacturing partners, we ensure each tensioner meets OEM specifications through rigorous pre-shipment testing. Unlike generic parts, our units are engineered to handle the high-vibration environment of excavator engines, providing consistent belt tension to prevent slippage and accessory damage. With 10,000+ SKUs in stock at our Guangzhou warehouse, we ship in 2–5 working days—so your equipment gets back to work fast.
This belt tensioner is the unsung hero in your Hyundai excavator's engine system, whether you're digging foundations, loading trucks at a quarry, or handling material at a port. It maintains optimal tension for the alternator, water pump, and other accessories, ensuring reliable power delivery and cooling—even during extended 12-hour shifts. For operators of R130LC-3 and R210LC-7 models, a failed tensioner can lead to overheating, battery drain, or sudden shutdowns in the middle of critical tasks.
What makes our tensioner stand out? We prioritize materials and design features that directly impact performance: The high-strength steel housing resists warping under thermal stress, while the precision-machined pulley ensures smooth rotation and reduced belt wear. The internal spring mechanism is calibrated to maintain consistent tension across temperature extremes, preventing both overtightening (which damages bearings) and slack (which causes slippage). Every unit undergoes load testing to verify it meets Cummins 4BT and 6BT engine torque requirements—ensuring a perfect fit with your existing belt drive system.
Opting for a cheap belt tensioner might save a few dollars upfront, but the hidden costs add up quickly. A counterfeit unit can fail in as little as 3 months, requiring another repair and lost productivity. For a Hyundai R210LC-7 working at $150/hour, even a 1-day delay costs $1,200—not including labor for reinstallation. Our tensioner, backed by a 3–12 month warranty, delivers OEM-equivalent performance at a fraction of the price, reducing your total cost of ownership by minimizing downtime and replacement cycles.
We’ve earned the trust of 120+ countries by focusing on reliability and service: All our parts come from ISO 9001-certified factories with strict incoming material inspections. Our 20+ technical experts verify part compatibility within 2 hours, ensuring you get the right tensioner for your Cummins engine the first time. With 10 years of export experience, we understand the urgency of construction deadlines—hence our 1-piece MOQ and flexible shipping options (express, air, or sea freight). When you order from us, you get more than a part: you get a partner invested in keeping your equipment operational.
Don’t let a faulty belt tensioner derail your project schedule. Send us your excavator model, engine type, and required quantity, and we’ll provide a detailed quote within 24 hours. First-time clients can request sample testing to verify quality before bulk orders. With our现货 inventory, your replacement tensioner could be on its way tomorrow—getting your Hyundai R130LC-3 or R210LC-7 back to full operation faster than OEM suppliers.
Q: Is this a genuine OEM part or aftermarket replacement?
A: This is an OEM-equivalent aftermarket belt tensioner, manufactured by ISO-certified factories to meet the same specifications as original Cummins parts.
Q: How can I confirm this tensioner fits my Hyundai excavator?
A: Provide your machine model (e.g., R210LC-7) and engine type (e.g., 6BT), and our technical team will verify compatibility within 2 hours.
Q: What warranty coverage do you offer?
A: We provide a 3–12 month warranty against manufacturing defects. If the tensioner fails under normal use, we’ll replace it free of charge.
Q: What is the minimum order quantity?
<p class="Send us your requirements -- part number, machine model, quantity, and destination. Our team responds within 24 hours with a competitive quote.
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