3306 Engine Connecting Rod 8N1721 for Heavy‑Duty Excavator Diesel Engine

1. Product Overview & Wholesale Price Range

The 3306 Engine Connecting Rod (Part # 8N1721) is high‑strength forged connecting rod for 3306 6‑cylinder diesel engine, transferring power between piston and crankshaft, widely fitted on excavators and heavy‑duty construction machinery.

• Factory Wholesale Price: $185‑295 USD / piece Direct factory supply, favorable bulk price for repair shops and distributors
• Material: Forged Alloy Steel, precise CNC machining
• MOQ: 1 Piece, bulk discount for large quantity orders
• Stock Lead‑time: In stock, 1‑3 working days dispatch for worldwide customers
• Warranty: 12‑month replacement warranty, metallurgical and dimensional inspection before shipment

2. Engine & Application Compatibility List

Perfect fit for 3306 diesel engine, applied on multiple heavy‑duty equipment:

• Engine Model: 3306
• OEM Part Number: 8N1721
• Applications: Excavators, mining machinery, generator sets, heavy‑duty construction equipment

3. Common Connecting Rod Failure Phenomena

• Connecting rod bending & twisting: Engine water hammer or over‑speed damage. Replace with brand‑new qualified connecting rod, do not straighten old bent rod.
• Big‑end bore wear & oval deformation: Long‑time bearing abrasion. Replace connecting rod together with new bearing shell set.
• Fatigue crack & fracture risk: Overload operation. Use forged steel connecting rod with raw‑material inspection to avoid sudden breakage.
• Small‑end bushing damage: Piston pin seizure. Match new bushing while installing new connecting rod.
• Bolt hole thread damage: Improper bolt torque. Always apply new connecting rod bolts for engine rebuild.

4. Related Popular Diesel Engine Spare Parts

5. Frequently Asked Questions

Q1: How can I confirm this connecting rod suits my 3306 engine?
A: Verify engine model 3306 and OEM number 8N1721. You can send engine serial number for cross‑check compatibility.

Q2: What quality tests are completed before delivery?
A: Each 3306 connecting rod passes raw‑material metallurgy inspection and dimensional tolerance check to eliminate hidden defect risk for heavy‑load working scenarios.

Q3: Can you provide complete overhaul kits for 3306 engine?
A: Yes, crankshaft, piston kits, bearing shells, cylinder liners and full overhaul kits are available to support one‑stop purchasing for engine rebuild projects.