Are you searching for a high-strength Isuzu 4BG1 crankshaft? Our forged steel replacement (OEM 8971031280) features induction-hardened journals to ensure maximum fatigue resistance in Hitachi and JCB excavators. Wholesale pricing.
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Looking for a durable engine foundation? The Isuzu 4BG1 crankshaft (OEM: 8-97103-128-0) is a premium forged steel component engineered for industrial duty.
It is specifically designed to prevent fillet cracking and journal scoring in Hitachi EX120 and JCB 200 excavators, offering superior structural integrity under high torque.
Bulk wholesale stock ready for immediate international shipping.
Source a high-quality, durable Isuzu 4BG1 crankshaft directly from a trusted wholesale supplier. We provide robust forged steel crankshafts meticulously designed for the demanding Isuzu 4BG1 4.3L diesel engine. Ideal for engine rebuilders, parts distributors, and fleet maintenance operations servicing Isuzu NPR, ELF trucks, and various industrial equipment.
This crankshaft is the backbone of your engine, converting piston motion into rotational power. Our 4BG1 crankshaft ensures reliability and performance.
| Feature | Specifications |
|---|---|
| Engine Model | Isuzu 4BG1, 4BG1-T (4-Cylinder) |
| OEM Part Number | 8-97103-128-0, 8970116121, 8971031280 |
| Material | High-Tensile Forged Steel (42CrMo) |
| Surface Treatment | Induction Hardened & Nitrided |
| Journal Hardness | HRC 55-62 |
| Machine Fitment | Hitachi EX120-5, EX135, Sumitomo SH120, JCB 200 |
Note: Always verify journal sizes required for your specific rebuild (e.g., standard or undersize bearings).
This Isuzu 4BG1 crankshaft is commonly used in:
Verification against engine serial number or original part number is recommended for guaranteed compatibility.
We supply a wide range of crankshafts for various Isuzu engine models. Please inquire about availability for:
| Model | Model | Model | Model |
|---|---|---|---|
| 4HF1 | 4BG1 | 4ZD1 | 6BG1 |
| 4HG1T | 4FC1 | 4ZA1 | 6HE1 |
| 4HK1 | 4JA1 | 4ZB1 | 6HK1 |
| 4HE1T | 4JB1/4JB1T | 4BD1 | 6SD1 |
| 4BA1 | 4DA1 | 4JJ1 | 6WA1 |
| 4BC2 (DB33) | DH100 | G161 | 6WG1 |
| 4JG1 | C223 | 6BB1 (NEW) | 6HH1 |
| 4JG2 | C240 | 6BB1 (OLD) | 6QA1 |
| C190 | 600P | DB58 | 10PC1 |
| 4BB1A | 4ZE1 | 6BF1 | 10PB1 |
| 6BD1 | 10PE1 | 4BE1 | 12PD1 |
| 6SA1 | 10PD1 | 12PC1 |
We can also discuss developing customized or billet crankshafts based on your drawings or samples.
Q1: What is the benefit of a forged steel crankshaft vs. cast iron for the 4BG1 engine?
A: Forged steel (42CrMo) offers significantly higher tensile strength and fatigue resistance than cast iron. For turbo-charged 4BG1-T engines operating in heavy excavators, forged steel is essential to prevent crankshaft snapping under high-load cycles.
Q2: What are the torque specifications for Isuzu 4BG1 main bearing caps?
A: The standard main bearing cap torque for the Isuzu 4BG1 is typically 167 Nm (123 lb.ft). Always use a calibrated torque wrench and follow the spiral sequence from the center to ensure even seating of the crankshaft journals.
Q3: How do I identify if my 4BG1 crankshaft needs replacement?
A: Check for visible scoring on journals, deep heat discoloration, or any detectable cracks at the fillets (the radius where journals meet the counterweights). If journals are worn beyond the maximum undersize limit (usually 0.50mm), a new crankshaft is required.
Interested in the Isuzu 4BG1 crankshaft or other engine parts? Contact our team today for wholesale pricing, availability, and expert support.
Email: [email protected]
Phone/WhatsApp: +86 13889277673
For Any Inquiries, please feel free to contact us, Our sales teams are always glad to support your business