Yanmar 3D84-1 Excavator Engine Crankshaft Forged Steel Compatible with Komatsu PC25 PC30 PC35

1. Product Overview & Factory Wholesale Price

The Yanmar 3D84-1 Engine Crankshaft is the core component for high-performance mini-excavator engines. Using advanced induction hardening and precision grinding technology, our crankshafts ensure maximum fatigue resistance and smooth engine operation.

• Factory Wholesale Price: $180 – $350 USD (Direct manufacturer pricing for bulk orders)
• Material: High-Grade Forged Steel / Alloy Casting (Optional)
• Hardness: HRC 45-55 (Main Journals and Con-rod Journals)
• Warranty: 12 Months / 2000 Working Hours
• Lead Time: Ready in stock, 1-2 days for dispatch

2. Technical Specifications & Compatibility

3. When to Replace Your 3D84-1 Crankshaft? (故障诊断)

If your engine exhibits the following symptoms, a crankshaft inspection or replacement is necessary:

• Abnormal Engine Knocking: Deep metallic thumping sounds usually indicate worn main bearings or journal damage.
• Low Oil Pressure: Excessive clearance between the crankshaft journals and bearings causes a significant drop in oil pressure.
• Severe Vibration: A bent or unbalanced crankshaft leads to premature engine wear and excessive vibration at high RPM.
• Engine Seizure: Lack of lubrication leads to "spun bearings" which often score the crankshaft beyond repair.

4. Frequently Asked Questions

Q1: Is this crankshaft forged or cast?
A: We provide high-durability forged steel versions as standard for mining and construction applications, ensuring 30% higher strength than cast iron versions.

Q2: How do you guarantee the quality?
A: Every 3D84-1 crankshaft undergoes ultrasonic flaw detection, hardness testing, and coordinate measuring machine (CMM) dimensional checks before leaving the factory.

Q3: Can you provide the matching bearing sets?
A: Yes, we offer full engine overhaul kits including main bearings, con-rod bearings, thrust washers, and pistons for the Yanmar 3D84-1 engine.