4D102 114254 114257 114304 114311 Engine Crankshaft Compatible with Komatsu

1. Product Overview & Wholesale Price Range

The 4D102 Engine Crankshaft (OEM Part # 114254 / 114257 / 114304 / 114311) is key rotating power component for 4D102 diesel engine, designed for stable operation of construction machinery and excavator equipment.

• Factory Wholesale Price: $290 – $540 USD Direct factory price for engine overhaul workshops
• Material Specifications: High‑strength cast material, journals with surface hardening treatment, good wear‑resistance and stable performance
• MOQ & Bulk Discount: 1 Unit, favorable price for bulk overhaul order
• Lead Time: 1‑3 working days, sufficient stock supports worldwide shipment
• Warranty: 12‑month replacement warranty, dynamic balance test and crack inspection before packing

2. Application Scope

Designed for engineering machinery high‑load working scenarios:

• Excavator Repair: Direct replacement for scored, worn or damaged original crankshaft during 4D102 diesel engine overhaul.
• Construction Machinery: Matches equipment powered by 4D102 engine, reduces engine vibration and improves operating stability.
• Engine Rebuild Workshop: Strict original dimension standard, no modification required for installation.
• Global Parts Distributor: Stable supply capacity, complete QC records support overseas spare‑parts resale business.

3. Common Crankshaft Failure Troubleshooting

• Fault 1: Journal Scoring & Wear Groove
  Cause: Oil impurities scratch the journal surface.
  Solution: Install brand‑new 4D102 crankshaft, replace oil filter and clean engine oil circuit.
• Fault 2: Main Bearing Burn‑out & Engine Knocking Noise
  Cause: Long‑time heavy‑load operation causes bearing clearance out of tolerance.
  Solution: Fit new crankshaft together with matched main and connecting rod bearing shells.
• Fault 3: Crankshaft Fatigue Crack Risk
  Cause: Engine overloading and sudden mechanical impact.
  Solution: Each crankshaft passes crack detection before delivery to avoid hidden breakage risk.
• Fault 4: Front & Rear Oil Seal Recurrent Oil Leakage
  Cause: Wear groove on oil seal journal causes persistent oil leakage.
  Solution: Replace complete crankshaft together with matching oil seal kits.

4. Matching Engine Spare Parts Recommendation

5. Frequently Asked Questions

Q1: How do I confirm this 4D102 crankshaft fits my engine?
A: Please confirm your engine model is 4D102, cross‑check OEM casting numbers 114254,114257,114304,114311. Send engine serial number for quick compatibility verification.

Q2: What is the material feature of this 4D102 crankshaft?
A: It adopts high‑strength cast material, journals go through surface hardening treatment, good wear‑resistance for daily heavy‑load construction work.

Q3: What quality inspections before shipment?
A: Every crankshaft completes dimension check, dynamic balance test and crack inspection before packing to eliminate potential failure risks.