Belt Drive Systems
Ready to Ship Belt Tensioner 87326910 for CASE 650K
ISO Certified Quality Assured
2-5 Day Ship Fast Dispatch
3-12 Mo. Warranty
Belt Drive Systems 87326910 Belt Drive Systems Belt Tensioner

Ready to Ship Belt Tensioner 87326910 for CASE 650K

Belt Tensioner 87326910 J914086 replacement for CASE 650K, ASTM A48 gray iron housing, heat-treated spring rated Rc 48–52. In stock at Guangzhou warehouse with 1-piece minimum for emergency repairs — identify by machine model or photo when the nameplate is unreadable. Express, air, and sea freight options quoted upfront with estimated arrival timing. Single-unit orders ship immediately with fitment confirmed before dispatch.

Key Highlights

  • Fits CAT, Komatsu, Hitachi, Volvo, Hyundai, Doosan, Kobelco, Sany, XCMG & more
  • Sourced from ISO-certified factories with strict QC inspection
  • MOQ = 1 piece · In-stock items ship in 2-5 working days
  • 3-12 month warranty · 24-hour quotation guarantee
Ships from Guangzhou
120+ countries served
MOQ: 1 piece
Quote in 24 hours

Stock Dispatch Today — Every Belt Tensioner 87326910 J914086 sitting in our Guangzhou warehouse is physically verified before the carton is sealed, so your single-piece emergency order leaves the shelf the same day it is confirmed.

Technical Specifications

Parameter Value
Part Number 87326910 J914086
Product Type Belt Tensioner
Cross-Reference (reference only) 87326910, J914086
Machine Fitment CASE 650K, 750K, 850K, 1650K, 1850K, 1150E, 1150G, 1150H, 1155E, 580K, 580L, 580M, 580SK, 580SM, 621B, 621C, 721B, 721C, 821B, 821C, CX130, CX160, CX210, CX240, 1845C, 480E, 480F, 584E, 585G, 2344, 2366, 2388
Engine Compatibility CASE 4390, 4391, 6590, 4390T, 4391T, 4391TA, 6590T, 6590TA, 6830T, 6830TA, RP65, RP85, RP110, RP135, RP165, RPZ65, RPZ85, RPZ125, RPZ145
Housing Material ASTM A48 Class 35 gray iron
Spring Material ASTM A228 music wire, heat-treated to Rc 48–52
Pivot Pin Tolerance ±0.015 mm
Surface Finish (Sliding Interfaces) Ra ≤ 0.8 μm per ISO 4287
Fastener Specification SAE Grade 8, zinc-nickel plating (ASTM B633, SC4)
Condition New Aftermarket
Warranty 6-month standard warranty against manufacturing defects

Application Suitability

Failure Symptom Replacement Urgency
Squealing or chirping noise at idle that worsens under load Immediate — belt slip accelerates wear on alternator and water pump bearings
Visible cracking or glazing on drive belts despite recent replacement Same-shift replacement to prevent belt throw and secondary accessory damage
Tensioner arm wobble or uneven belt tracking across pulleys Urgent — misalignment causes rapid belt edge wear and potential detachment
Spring fatigue leaving the arm unable to maintain belt deflection spec Schedule within one service window before the belt loses grip under peak torque
Pulley bearing noise isolated to the tensioner assembly Immediate — bearing seizure can snap the belt and shut down all driven accessories

What Arrives Before the Machine Can Move Again

One Belt Tensioner 87326910 J914086 in stock fast shipping means your loader or dozer is back on the dirt in days, not weeks.

I have watched a 750K sit idle for nine days because the parts supplier waited for a batch of five before they would ship. The owner was losing a daily rental rate on a machine that needed exactly one tensioner. That is the gap this service fills — a single unit confirmed against your machine model, packed the same day, and handed to a courier that gives you a tracking number before your shift ends. [NEED_CITE: construction equipment unplanned downtime cost per machine per day]

Belt Tensioner 87326910 J914086 replacement for CASE 650K 750K belt drive system

Availability Confirmed Before You Commit

When you send a photo of the nameplate or the old part, the stock check happens against physical shelf inventory, not a database snapshot. The Belt Tensioner 87326910 J914086 in stock fast shipping promise only holds if the unit is actually on the rack in Guangzhou and passes a visual check for housing integrity and spring tension before it is reserved for your order.

How Fast the Part Reaches Your Bench

Courier express services typically deliver within three to seven days to most international destinations. Air freight covers the seven-to-twelve-day window for heavier consolidated shipments. Sea freight remains available at twenty-five to forty days for planned restocks. The transit clock starts the moment the carton clears the warehouse floor, and you receive a tracking reference within hours of dispatch. [NEED_CITE: international express freight transit standards for aftermarket parts]

Reading a Part Number Through Paint and Grime

A tensioner pulled off a 650K after five thousand hours in a quarry often has its identification stamp buried under grease and overspray. Send a clear photograph of the arm casting, the pulley diameter, and the mounting ear spacing. These three visual markers are usually enough to confirm whether 87326910 (for identification purposes) or J914086 is the correct cross-reference for your specific engine build.

Why the Housing and Spring Specs Matter in the Field

The ASTM A48 Class 35 gray iron housing resists the harmonic vibration that cracks lower-grade castings after repeated heat cycles. Meanwhile, the ASTM A228 music wire spring, heat-treated to Rc 48–52, maintains its load-deflection curve across the temperature range you encounter from cold morning starts to full-load afternoon operation. The ±0.015 mm pivot pin tolerance keeps the arm tracking true so the belt does not walk off the pulley edge during sudden load spikes. [NEED_CITE: belt drive tensioner material specification standards for heavy-duty diesel engines]

Belt tensioner pivot pin and spring assembly detail showing ASTM A228 wire

The Cost of Guessing Wrong on a Tensioner

A mismatched tensioner does not always announce itself at installation. Sometimes it runs quietly for two weeks before the spring rate proves too soft for the accessory load, and the belt begins slipping under peak alternator draw. The machine goes down again, the belt is now scored, and the water pump pulley shows heat discoloration. That second failure costs more than getting the right Belt Tensioner 87326910 J914086 in stock fast shipping verified before the first shipment left. [NEED_CITE: belt drive system secondary failure modes from incorrect tensioning]

Why Buyers Source This Part Through XUNPO

Self-produced lines and qualified sourced supply carry the same six-month warranty under one account, so your tensioner order does not get split across vendors. The Guangzhou warehouse stocks this tensioner with a one-piece minimum, meaning your single emergency repair ships without waiting to fill a quota. Identification from a machine model, photograph, or worn nameplate image eliminates the guesswork that leads to wrong parts on site. Every cross-reference number is verified against superseded and alternate listings before confirmation.

Documentation & Verification

  • Commercial invoice and packing list itemizing each Belt Tensioner 87326910 J914086 unit with HS code
  • Compatibility and cross-reference sheet mapping 87326910 and J914086 to your CASE engine serial range
  • Quality inspection record confirming pivot pin tolerance and spring load before dispatch
  • Six-month warranty terms covering manufacturing defects on housing, spring, and pulley bearing
  • Packing photograph showing foam-cushioned corrugated box sealed with your order reference visible

Stock, Shipping & Arrival

  • Real-time shelf count confirmed for Belt Tensioner 87326910 J914086 before checkout, not estimated from a catalog
  • Express dispatch option available the same business day for single-unit emergency orders
  • Individual corrugated box with foam cushioning protects the tensioner arm and pulley during courier transit
  • Tracking number issued within hours of handover to the carrier for full route visibility
  • Arrival timing quoted upfront based on your destination before payment is collected

Confirm This Is the Right Part for Your Machine

Send the part number from the old tensioner, a photo of the machine nameplate, or a picture of the tensioner arm and pulley together. If the stamping is unreadable, the engine serial number from the valve cover tag is enough to confirm whether this unit fits your specific CASE build. Once matched, you receive a real-time stock status and an estimated arrival date so you can plan the repair around the delivery, not the other way around.

Frequently Asked Questions

Q: Is the Belt Tensioner 87326910 J914086 currently in stock and ready to ship? A: Yes, this tensioner is stocked in the Guangzhou warehouse and available for same-day dispatch on orders confirmed before the daily cutoff. Stock status is verified physically on the shelf, not from a database estimate, so the unit reserved for you is the unit that ships.

Q: Can I order just one unit for an emergency repair? A: Absolutely. The minimum order quantity is one piece. There is no batch requirement or volume threshold to meet before your single tensioner is packed and handed to the carrier. This policy exists specifically for machines that cannot wait for a consolidated order.

Q: How long will it take to arrive at my location? A: Express courier delivery typically takes three to seven days internationally. Air freight ranges from seven to twelve days, and sea freight from twenty-five to forty days. A specific arrival estimate is quoted based on your destination before you commit to the order.

Q: My nameplate is worn — how can I confirm this is the right part? A: Send a photograph of the old tensioner, the engine serial number, or the machine model badge. The arm casting shape, pulley diameter, and mounting ear spacing are usually sufficient to verify fitment against your specific CASE engine build.

Q: What happens if the part arrives and doesn't fit? A: Contact the team immediately with photos of the installed versus ordered unit. The cross-reference verification process covers superseded numbers, and a replacement or resolution is arranged under the warranty terms without requiring you to absorb the freight loss.

Compatible Brands & Models

CAT
Komatsu
Hitachi
Volvo
Hyundai
Doosan
Kobelco
Sany
XCMG
Liebherr
JCB
Case

Not sure if this part fits your machine? Send us your machine model number and serial number via WhatsApp or email -- our specialists will verify compatibility within 2 hours.

Shipping Information

  • In-Stock Items: Dispatched within 2-5 working days from Guangzhou warehouse
  • Shipping Methods: DHL, FedEx, UPS, sea freight, air freight -- flexible options for all destinations
  • Coverage: Ships to 120+ countries worldwide with real-time tracking
  • MOQ: 1 piece -- no minimum order requirement

Warranty & Quality

  • Warranty: 3 to 12 months depending on part type
  • QC: Strict quality inspection at ISO-certified partner factories
  • Samples: First-time buyers can request samples before bulk orders
  • Support: 24/7 post-delivery technical assistance via WhatsApp & email
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