Connecting Rod 719810-23100 for Yanmar 3TNE78 3TNE78A Engine

Product Specifications

Compatible Models

Frustrated by Connecting Rod Failures on Your Yanmar 3TNE78 Engine?

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.

OEM-Equivalent Quality, In Stock and Ready to Ship

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.

Where This Part Works

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.

Engineering Details That Matter

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.

The Real Cost of Wrong Parts

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.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in anti-rust film, secured in custom foam inserts inside reinforced double-wall corrugated boxes
• In-stock items ship within 2–5 working days after payment confirmation
• Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — quoted per destination
• Real-time tracking provided from dispatch to delivery
• Minimum order quantity: 1 piece — designed for urgent field repairs and small-batch rebuilds

Get Your Connecting Rod Now

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.

Frequently Asked Questions