4JG1 8‑97186‑938‑0 Forged Steel Engine Crankshaft Compatible with Construction Machinery Engine

1. Product Overview & Wholesale Price Range

The 4JG1 Old‑Version Forged Steel Crankshaft (Part # 8‑97186‑938‑0) adopts solid forged steel blank. High‑precision journal grinding and integral quenching heat‑treatment. Pass strict dimension check, dynamic balance calibration and magnetic particle crack inspection, excellent anti‑fatigue performance for heavy‑duty working conditions.

• Factory Wholesale Price: $385‑485 USD / piece Direct factory supply, bulk discount for repair workshops and machinery spare‑parts distributors
• Material: Forged Steel Blank, journal grinding, quenching heat‑treatment, dynamic balance & crack inspection
• MOQ: 1 Piece, preferential price for bulk purchasing
• Stock Lead‑time: In stock, 1‑3 working days dispatch for global clients
• Warranty: 12‑month replacement warranty, multi‑item quality check before shipment

2. Engine & Application Compatibility List

Direct‑fit replacement for old‑style 4JG1 diesel engine, widely applied to construction machinery equipment:

• Engine Model: 4JG1 Old‑Version
• OEM Part Number: 8‑97186‑938‑0
• Structure: Forged Steel Engine Crankshaft Assembly
• Applications: Excavators and other heavy‑duty engineering machinery

3. Common Forged Crankshaft Failure Modes

• Journal wear & scoring: Caused by oil shortage or dirty lubricant. Replace crankshaft when wear value exceeds allowable tolerance.
• Shaft bending & distortion: Caused by engine seizure or piston impact. Forged shaft deformation cannot be simply straightened, new crankshaft is recommended for overhaul.
• Fatigue crack risk: Occurs under long‑term heavy cyclic load. Every crankshaft will go through crack detection before delivery to avoid fracture failure.
• Oil‑seal position abrasion: Result in engine oil leakage. Inspect oil‑seal journal surface during engine maintenance work.
• Counterweight loosening: Trigger abnormal vibration and loud noise. Replace full crankshaft assembly once counterweight gets loose or damaged.

4. Matching Diesel Engine Spare Parts

5. Frequently Asked Questions

Q1: How do I confirm this forged crankshaft fits my 4JG1 engine?
A: Cross‑check OEM number 8‑97186‑938‑0, note this part fits old‑version 4JG1 engine. Send engine serial number for compatibility confirmation before order.

Q2: What quality inspections are performed before shipment?
A: Each forged crankshaft undertakes dimension measurement, journal surface inspection, dynamic balance calibration and magnetic‑particle crack detection.

Q3: Can you provide complete overhaul spare‑parts for 4JG1 engine?
A: Yes, connecting rods, piston kits, bearing shells and full overhaul kits can be supplied for one‑stop engine rebuild procurement.