Wholesale Isuzu 4HK1 forged steel crankshaft for 4HK1-TC engines. Features 42CrMo construction and HRC 55-62 hardness. OEM 8-98029-270-0 ensures long-term reliability for NPR trucks and Hitachi excavators.
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The Isuzu 4HK1 forged steel crankshaft (OEM: 8-98029-270-0) is a high-performance engine component built from 42CrMo alloy steel.
It features precision-balanced counterweights and induction-hardened journals to withstand high common rail pressures in Isuzu NPR, NQR trucks and Hitachi ZX200-3 excavators.
Bulk wholesale stock available for immediate global export.
Maximize the uptime of your medium-duty trucks and heavy construction machinery with a premium replacement Isuzu 4HK1 Crankshaft. Designed for the advanced 5.2L overhead cam common rail diesel engine, this component is the definitive solution for engines requiring a complete bottom-end rebuild due to fracture, journal wear, or high-hour fatigue. Installing this high-strength shaft ensures your equipment returns to peak operational efficiency.
This engine shaft is manufactured to honor Isuzu’s reputation as a “Commercial Vehicle Specialist.” We utilize a high-tensile forged steel construction, which is precision-machined and induction hardened to withstand the immense combustion pressures and torque output of the turbocharged 4HK1-TC engine. It is the trusted choice for fleet managers operating Isuzu N-Series (NPR/NQR) trucks and maintenance supervisors servicing Hitachi and Sumitomo excavators, offering OEM-level durability at a competitive price.
| Technical Feature | Detailed Specification |
|---|---|
| Engine Compatibility | Isuzu 4HK1, 4HK1-TC, 4HK1-TCC, 4HK1-TCN |
| OEM Part Number | 8-98029-270-0 / 8980292700 / 8-97311-632-1 |
| Material Composition | 42CrMo High-Tensile Forged Steel |
| Surface Hardness | HRC 55-62 (Induction Hardened Journals) |
| Applicable Trucks | Isuzu NPR, NQR, NRR, GMC W-Series |
| Excavator Applications | Hitachi ZX200-3, ZX240-3, ZX270-3, JCB JS200, JS220 |
Ruich Value is your global partner for a comprehensive range of Isuzu diesel engine crankshafts. From the 4H series to the larger 6H and 6W series, we supply the durable core components your business relies on.
Category coverage: Isuzu 6HK1 & 6BG1 Excavator Cranks; 4JJ1 & 4JG2 Engine Shafts; 6WA1 & 6WG1 Heavy-Duty Crankshafts.
| 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 |
Customized/billet crankshaft development based on drawings or samples is also possible.
Q1: Why is forged steel essential for the Isuzu 4HK1 engine?
A: The 4HK1 uses a high-pressure common rail fuel system that exerts significant stress on the rotating assembly. Forged steel provides the necessary tensile strength and fatigue resistance to prevent crankshaft snapping, which is a known risk in high-load excavator and commercial truck applications.
Q2: What is the main bearing torque specification for the 4HK1 engine?
A: For the Isuzu 4HK1, the main bearing cap bolts should be torqued in stages: initially to 59 Nm (44 lb.ft), then tightened further to an angle of 60 to 90 degrees. Always use new bolts and follow the OEM sequence to ensure proper crankshaft alignment.
Q3: How does the 8-98029-270-0 differ from the older 8-97311-632-1?
A: The 8-98029-270-0 is an updated OEM reference that often features improved oil passage geometry and updated counterweight balancing. It is fully backward compatible with most 4HK1-TC industrial and vehicle engines originally equipped with the older part number.
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