Product Specifications
| Parameter | Details |
|---|
| Part Name | Connecting Rod |
| Part Number (OEM Reference) | Yanmar 3TNA72, 3TNA72UJ, 3TNA72L, 3TNA72E, 3TNA72E-G2, 3TNA72E-GB2, 3TNA72E-HP, 3TNA72E-NC, 3TNA72E-S, 3TNA72E-UAS, 3TNA72E-UNS, 3TNA72E-YL, 3TNA72L-UDW, 3TNA72L-UDW2, 3TNA72L-UKS, 3TNA72L-UMCD, 3TNA72L-UMS, 3TNA72L-UTBZ, 3TNA72L-UWD |
| Brand Compatibility | Yanmar, John Deere |
| Machine Model Fitment | Yanmar YB121, YB151, FF165, FF155, F145; John Deere 430, 455, 755, 670, F925 |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual protective packaging with anti-rust oil and sturdy corrugated box |
Compatible Models
| Brand | Applicable Models |
|---|
| YANMAR | YB121, YB151, FF165, FF155, F145 |
| JOHN DEERE | 430, 455, 755, 670, F925 |
Tired of Engine Failure After Replacing a Faulty Connecting Rod on Your Yanmar 3TNA72 or John Deere 455 Tractor?
One failed connecting rod can shut down an excavator for days — costing $2,500+ per day in idle equipment and labor. Many customers report receiving counterfeit rods that crack within 200 operating hours, forcing repeat downtime. OEM replacements take 3–4 weeks to arrive and cost up to 45% more than verified aftermarket alternatives. Finding one supplier for both Yanmar and John Deere engine parts adds another layer of sourcing complexity.
OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse
This Yanmar 3TNA72 connecting rod is manufactured in ISO 9001-certified facilities and undergoes full dimensional verification and tensile strength testing before shipment. With 10 years’ experience supplying heavy equipment operators across 120+ countries, XUNPO delivers precision-engineered replacement rods used in real-world excavator digging cycles and tractor PTO-driven operations — not just bench-tested prototypes. All units meet original Yanmar crankshaft journal tolerance specs (±0.005 mm) and bearing bore roundness standards (≤0.012 mm).
Where This Part Works
This connecting rod operates under high-cycle compression loads in compact excavators like the Yanmar YB121 working on urban utility sites, and in John Deere 455 tractors deployed in agricultural field operations with frequent load variation. In quarry applications, it endures repeated shock loading during rock breaking. Correct material integrity and dimensional accuracy are critical: deviation beyond ±0.01 mm causes uneven piston travel, accelerated cylinder liner wear, and eventual head gasket failure.
Engineering Details That Matter
Forged 42CrMo alloy steel ensures fatigue resistance at 850 MPa tensile strength — essential for engines operating above 2,800 rpm. Heat-treated to HRC 32–36 maintains ductility while resisting micro-crack propagation under thermal cycling. Precision honing achieves surface roughness Ra ≤0.8 μm on big-end and small-end bores, reducing bearing friction and oil film breakdown risk. Strict adherence to OEM journal diameter (42.98–43.00 mm) and center-to-center length (135.0 ±0.05 mm) guarantees zero interference with crankshaft counterweights or piston clearance. Phosphate coating provides 72-hour salt-spray corrosion resistance without compromising torque retention.
The Real Cost of Wrong Parts
A substandard rod may save $15 upfront but risks catastrophic engine seizure — leading to $4,200+ in crankshaft, block, and cylinder head replacement. Industry data shows counterfeit rods fail 1.7× faster than ISO-compliant units, increasing unscheduled maintenance frequency by 3.2×. Total cost of ownership (TCO) includes not only part price but also labor ($120/hr × 8 hrs), lost production ($2,500/day × 3 days), and potential penalty clauses in construction contracts. This Yanmar 3TNA72E replacement rod meets SAE J429 Grade 8.8 bolt preload specifications and Yanmar’s internal dynamic balance thresholds — ensuring long-term reliability.
Why Customers Trust XUNPO
Only ISO 9001-certified factories supply our engine components — each batch undergoes incoming material inspection for chemical composition and grain structure. Every connecting rod is 100% tested for straightness (≤0.03 mm/m), hardness profile, and bearing bore concentricity before packing. We offer 3–12 month warranty covering manufacturing defects — no restocking fees, no return shipping cost. Our 10-year export track record includes verified shipments to repair centers in Germany, Canada, Nigeria, and Indonesia. A dedicated technical team with 15+ years’ field service experience confirms part fitment within 2 hours. Over 10,000 SKUs are held in stock at our Guangzhou warehouse — including this Yanmar 3TNA72 connecting rod — enabling 2–5 working day dispatch.
Packaging & Shipping
- Individually sealed in vacuum-packed anti-rust film, cushioned with EPE foam, and packed in double-wall corrugated cartons rated for 25 kg stacking load
- In-stock items shipped within 2–5 working days after payment confirmation
- Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — all with real-time tracking
- Full shipment visibility provided via tracking number and carrier portal link
- Minimum order quantity: 1 piece — designed for urgent field repairs
Get Your Yanmar 3TNA72 Connecting Rod Now
Your excavator or tractor isn’t generating revenue while waiting for parts. Send us your machine model (e.g., Yanmar YB121 or John Deere 455), required quantity, and destination — we’ll email a competitive quote within 24 hours. First-time buyers may request a sample for functional validation before bulk ordering. Stock availability means your order ships fast — helping you avoid costly delays.
Frequently Asked Questions
Q: Is this an original Yanmar part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket connecting rod produced in ISO 9001-certified factories, meeting Yanmar 3TNA72 dimensional and material specifications.
Q: How do I confirm this fits my specific machine?
A: Provide your exact engine number (e.g., 3TNA72E-NC) or machine model (e.g., John Deere F925). Our technical team verifies compatibility and responds 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 free of charge.
Q: What is the minimum order quantity?
A: 1 piece — no exceptions. Ideal for emergency repairs or single-unit testing.
Q: How soon will my order ship?
A: In-stock orders ship within 2–5 working days. Express options available for urgent delivery.
Q: Can I receive a sample before placing a bulk order?
A: Yes — first-time customers may request one sample for functional evaluation. Sample fee is refundable upon bulk order confirmation.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 187 2205 7128 | Email: talos@xunpojx.com
