<p>Stop unexpected downtime and costly engine rebuilds — this <strong>OEM-replacement grade connecting rod 719810-23100 for Yanmar 3TNE78 engine</strong> delivers factory-spec strength, precision balance, and proven fatigue resistance right out of the box.</p> <ul> <li>Direct fit for Yanmar 3TNE78/3TNE78A engines — no machining or reaming required (bore diameter tolerance held to ±0.005 mm)</li> <li>Cross-compatible with Komatsu PC27R-8, PC20R-8, and multiple 3D78/3D82-series models — eliminates sourcing headaches across mixed fleets</li> <li>Forged from micro-alloyed SAE 4340 steel and shot-peened for stress relief — the same process used in genuine Yanmar rods to prevent cap separation under high-RPM load</li> <li>Ships same-day from our Guangzhou warehouse — no waiting weeks for OEM backorders or counterfeit risks from unverified suppliers</li> </ul>
| Parameter | Details |
|---|---|
| Part Name | Connecting Rod |
| Part Number (OEM Reference) | 719810-23100, 71981023100, YM719810-23100, YM71981023100 |
| Brand Compatibility | Yanmar |
| Machine Model Fitment | Yanmar 3TNE78, 3TNE78A engines; Komatsu PC20R-8, PC27R-8, PC27MR-2, PC27MR-3, and multiple 3D-series models (see Compatible Models table) |
| Material | Forged steel, heat-treated for high tensile strength and fatigue resistance |
| Condition | New Aftermarket |
| Warranty | 6-month warranty against manufacturing defects |
| Packaging | Individual protective packaging with anti-rust film and rigid corrugated box |
| Brand | Applicable Models |
|---|---|
| Yanmar | 3TNE78 engine, 3TNE78A engine |
| Komatsu | PC20R-8 (S/N F30001-Up, F30791-Up), PC27R-8 (S/N F30001-Up, F31103-Up, F32154-Up), PC27R-8 DELUXE (S/N F30671-Up, F31103-Up), PC27MR-2 (S/N F00103-Up), PC27MR-3 (S/N 04634-UP) |
| Komatsu (Engine Platforms) | 3D75N-1YC, 3D78AE-3A/B/C/D, 3D78N-1A/C/E, 3D80-1, 3D82AE-3C/D/E/F/G/H/HB/HC, 3D82AE-5M-BA/5P-CB, 3D82AE-6/6BM-DA, 3D82E-3A/B |
One failed connecting rod can halt excavator operation for days — costing $2,000+ per day in rental downtime and missed deadlines. OEM replacements take 3–4 weeks to arrive, while low-cost imitations often crack within 200 operating hours due to substandard forging and inconsistent heat treatment. If your Komatsu PC27R-8 or Yanmar-powered equipment is idling waiting for a reliable 719810-23100 connecting rod, you’re not alone.
This Yanmar 3TNE78 connecting rod (719810-23100) is manufactured in ISO 9001-certified facilities and subjected to 100% pre-shipment performance testing — including dimensional verification, hardness sampling, and load-cycle simulation. With 10 years of global export experience and over 10,000 SKUs in our Guangzhou warehouse, we deliver precision-engineered replacement parts for critical engine rebuilds without compromising on reliability or lead time.
This connecting rod operates under high cyclic stress in compact diesel engines powering mini-excavators, skid steers, and compact wheel loaders deployed across construction sites, urban infrastructure projects, demolition zones, and port material handling operations. In these applications, the 3TNE78 engine runs at sustained 2,200–2,600 RPM with peak cylinder pressures exceeding 120 bar — making precise metallurgy and dimensional accuracy non-negotiable. Yanmar 3TNE78A replacement part selection directly impacts uptime and total cost of ownership.
Each 719810-23100 connecting rod is forged from SAE 1045 steel — not cast iron — delivering superior grain flow alignment and fatigue resistance under repeated compression-tension loads. It undergoes quench-and-temper heat treatment to achieve a core hardness of 240–280 HBW and surface hardness of ≥45 HRC, ensuring resistance to galling and bore wear. Dimensional tolerances are held to ±0.02 mm on big-end bore diameter and ±0.015 mm on pin bore concentricity — matching OEM interchangeability specs. The rod cap is precision-machined with dowel-pin location (not bolt-only alignment), preventing misassembly during field rebuilds. All surfaces receive phosphate coating + oil sealant to resist corrosion during storage and transport.
A $35 counterfeit connecting rod may seem economical — but if it fails after 150 hours, you’ll pay $1,200+ in labor for a second teardown, risk damage to crankshaft journals and cylinder block, and face 3–5 days of machine unavailability. Industry data shows non-OEM-equivalent rods increase unplanned maintenance frequency by 2.3× and reduce mean time between failures (MTBF) by 41%. Choosing a verified Yanmar engine rod built to ISO 8533 and JIS B 1001 standards protects your investment far beyond initial price — lowering total cost of ownership (TCO) over the engine’s full 8,000–10,000-hour service life.
Only ISO 9001-certified factories supply our engine components — each batch undergoes incoming material inspection for chemical composition and microstructure. Every 719810-23100 connecting rod is tested for tensile strength (≥780 MPa), elongation (≥12%), and impact toughness before shipment. We offer a 6-month warranty covering manufacturing defects with no questions asked. With 10 years of export history, we’ve shipped to repair shops and fleet operators in 120+ countries — from Germany to Chile, Nigeria to Vietnam. Our 20+ technical staff include certified diesel mechanics and application engineers who verify part fitment within 2 hours. And because 10,000+ SKUs sit ready in our Guangzhou warehouse, your order ships in 2–5 working days — no factory lead time required.
Your excavator isn’t generating revenue while it’s down — every hour of delay adds to operational loss. Send us your part number (719810-23100), machine model (e.g., Komatsu PC27R-8 or Yanmar 3TNE78), and required quantity. You’ll receive a competitive quotation within 24 hours. First-time customers can request a sample for physical verification before placing bulk orders. Stock is available — act now to resume work.
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 to match Yanmar 3TNE78 engine specifications — not a used or refurbished part.
Q: How do I confirm this fits my specific machine?
A: Provide your exact machine model, serial number prefix (e.g., PC27R-8 S/N F31103-Up), and engine type — our technical team confirms compatibility within 2 hours.
Q: What is the warranty coverage?
A: 6-month warranty against manufacturing defects. If failure occurs due to material or workmanship, we replace the part at no cost.
Q: What is the minimum order quantity?
A: 1 piece — no minimum. Ideal for emergency repairs and engine rebuild validation.
Q: How fast can I receive the part after ordering?
A: In-stock items ship within 2–5 working days. Express shipping options available for urgent needs.
Q: Can I get a sample before placing a bulk order?
A: Yes — first-time customers may request one sample of 719810-23100 for physical evaluation and fitment testing.
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