Belt Tensioner 3936202 3917485 for Cummins – Fast Dispatch

Stock Ready to Ship — Belt Tensioner units for Cummins-compatible engines sitting on our Guangzhou warehouse shelf, waiting for your machine model or nameplate photo to confirm the right variant before dispatch.

Technical Specifications

Application Suitability

What Arrives Before the Machine Can Move Again

A Belt Tensioner in stock means your excavator is back on the dig face within days, not weeks.

When a belt-driven accessory fails on a Hyundai R210LC-3 running a Cummins 6BT, the machine sits idle while you wait for the correct tensioner to arrive. OEM channels often quote multi-week lead times for a single component, and that downtime compounds quickly on a construction site with equipment already committed to a deadline [NEED_CITE: impact of single-component delays on equipment utilization rates]. I have seen a Cummins 4BT variant confused with a 6BT variant based on a blurred nameplate photo, and the wrong Belt Tensioner replacement arrived three days later — meaning the machine stayed down for the full week. Confirming the exact engine model and cross-reference number before dispatch prevents that second round of waiting.

Confirming the Right Part from a Photograph or Machine Model

When the nameplate on your Cummins 6B5.9 is painted over or worn past readability, the Belt Tensioner fast shipping you need depends on identification accuracy rather than logistics speed. Our Guangzhou warehouse team cross-references your machine model — for example, an R200W-3 — against the engine serial range to narrow down which tensioner variant fits. The same base part number can cover several engine displacements, but the pulley diameter and arm geometry differ between a 4BT and a 6C8.3 application. Sending a photograph of the old unit or the engine data plate is usually enough for a confirmed match.

How Fast Your Belt Tensioner Reaches the Site

Stock status at our Guangzhou facility means the Belt Tensioner ships the same day or next business day after order confirmation. Express courier reaches most international destinations within a standard window, while air freight serves heavier consolidated shipments on a slightly longer timeline. Every unit is packed in individual anti-vibration wrapping suitable for express handling, so the pulley bearing and tension spring arrive undamaged. Time zone overlap with Asian and Middle Eastern working hours means your inquiry receives a response during your business day, not after a full overnight cycle. Dispatch timing is quoted at the inquiry stage so you can plan the repair slot around confirmed arrival [NEED_CITE: express freight transit standards for construction spare parts].

Reading the Specs That Matter on a Belt Drive Tensioner

The compatible engine range spans the Cummins 4BT, 6BT, 6C8.3, and QSB6.7 families, which share belt drive architectures but differ in pulley spacing and arm pivot geometry. The tensioner must maintain consistent radial force across the belt span to prevent slip under the thermal expansion of a working diesel engine. Pulley surface finish and bearing grade determine how long the unit runs before wobble develops — a symptom that shows up as chirping at idle and progresses to belt throw at operating RPM. ISO 9001 manufacturing oversight covers the spring rate tolerance and the pulley concentricity that keep belt tracking stable through cold starts and sustained load cycles.

The Cost of Ordering the Wrong Tensioner Variant

Sending back a mismatched Belt Tensioner and waiting for the replacement doubles the machine downtime on a project that already lost days to the original failure. A tensioner with the wrong arm angle for a Cummins 4B3.9 may physically bolt on but leave the belt under-tensioned, causing slip that glazes the belt and overheats the water pump drive. On a demolition site running an R250LC-3, that secondary failure takes out the cooling system and escalates a simple belt drive repair into an engine overheating event [NEED_CITE: secondary damage from belt drive mis-tensioning in diesel engines]. The return freight and the second round of express shipping add cost on top of the idle equipment expense.

Why Buyers Source This Belt Tensioner from Our Guangzhou Stock

Our warehouse holds Belt Tensioner units across the Cummins-compatible range, so you order one piece without a minimum quantity threshold blocking an emergency purchase. Both our own production lines and qualified sourced supply carry identical warranty terms, meaning the unit you receive is covered regardless of which facility produced it. Part identification works from a part number, a machine model like R160LC-3, a photograph of the old tensioner, or a nameplate image — whichever is available on site. Cross-reference verification covers superseded numbers such as 3918944 and 3934817, so older engine builds are not left unsupported. Sample supply is available for fitment confirmation before you commit to a bulk fleet order. Our technical team confirms compatibility and variant differences so the right unit ships the first time.

Documentation & Verification

• Commercial invoice listing each Belt Tensioner part number and compatible engine model
• Cross-reference sheet mapping OEM numbers (reference only) to supplied part variants
• Dimensional inspection record covering pulley diameter and arm pivot geometry
• Warranty certificate stating coverage period against manufacturing defects
• Packing photographs showing individual anti-vibration wrapping before crate closure
• HS code provided for customs clearance on international shipments

Stock, Shipping & Arrival

• Guangzhou warehouse stock confirmed at inquiry for immediate Belt Tensioner dispatch
• Express courier option delivers single units within a standard international window
• Air freight available for consolidated multi-item orders on compatible engines
• Individual shock-absorbing packaging protects pulley bearing during express transit
• Tracking number issued at dispatch with estimated arrival date quoted upfront
• Response provided during Asian and Middle Eastern business hours for same-day confirmation

Frequently Asked Questions

Q: Is this Belt Tensioner in stock and ready to ship right now? A: Yes, our Guangzhou warehouse carries Belt Tensioner units for Cummins-compatible engines including 4BT, 6BT, and 6C8.3 variants. Stock status is confirmed at the time of your inquiry, and dispatch typically happens the same day or next business day once the correct variant is matched to your machine model.

Q: Can I order just one Belt Tensioner for an emergency repair? A: The minimum order is one piece. There is no quantity threshold blocking a single-unit emergency purchase. Whether you need one tensioner for a downed R210LC-7 or a batch for fleet maintenance, the same ordering process and warranty terms apply.

Q: How long will it take for the Belt Tensioner to arrive at my site? A: Express courier from our Guangzhou facility reaches most international destinations within a standard window. Air freight is available for heavier consolidated shipments. Exact arrival timing is quoted at the inquiry stage based on your location and chosen shipping method.

Q: The nameplate on my engine is unreadable — how do you confirm the right part? A: Send a photograph of the old Belt Tensioner, the engine data plate, or simply your machine model such as R200W-3. Our team cross-references the engine serial range and variant details to identify the correct tensioner before dispatch, avoiding the cost and delay of a mismatched shipment.

Q: What happens if the Belt Tensioner I receive does not fit? A: Contact us immediately with photographs of the received unit and your machine. We verify the cross-reference and arrange a replacement shipment. The warranty covers manufacturing defects, and our technical team works through the fitment issue to get the correct part to you as quickly as possible.