61560020029/61500020071: High-Strength Crankshaft for WD615 Euro 2/3 SINOTRUK Howo Engines

The heart of any diesel engine’s rotating assembly, the crankshaft, must withstand immense forces to convert piston motion into usable torque. For SINOTRUK Howo trucks powered by the renowned WD615 engine platform, the 61560020029/61500020071 Crankshaft is engineered to meet the rigorous demands of Euro 2 and Euro 3 emission standard applications. This precision-forged component, with a hardened surface hardness of HRC 50, represents the pinnacle of durability and performance for heavy-duty operation.

As a foundational chassis-related engine part, its integrity is non-negotiable for vehicle reliability. Sourcing genuine, high-specification Sinotruk howo parts like this Huatai crankshaft ensures your powerplant delivers consistent power, smooth operation, and an extended service life, even under the most punishing load cycles in logistics, construction, and mining.

Engineering Excellence of the 61560020029/61500020071 Crankshaft

The 61560020029/61500020071 is a drop-forged crankshaft designed specifically for the Weichai WD615 series diesel engine, which powers a vast range of SINOTRUK Howo models. This component is the central rotating shaft that converts the linear, reciprocating motion of the pistons into rotational force to drive the transmission and ultimately the wheels. Engineered for Euro 2 and Euro 3 emissions-compliant engines, it meets specific performance and durability criteria required for cleaner combustion and higher efficiency.

The “HRC 50” designation indicates a Rockwell Hardness of 50 on the C scale for the journal surfaces, meaning the bearing contact areas are exceptionally hard and wear-resistant. This hardness is achieved through advanced induction hardening or nitriding processes, which create a tough outer layer while maintaining a ductile, shock-absorbing core—a critical balance for withstanding bending and torsional stresses.

The design incorporates precisely machined main journals (which rotate in the engine block) and crankpins (connected to the connecting rods). Counterweights are strategically placed to balance the rotating assembly, minimizing vibration and bearing load. Oil passages are drilled internally to ensure a reliable supply of high-pressure lubricant to all critical bearing surfaces. In heavy-duty applications where engines often operate at high load factors, the integrity of the 61560020029/61500020071 crankshaft is paramount. A failure here typically results in catastrophic engine destruction, making the quality of this component a direct investment in the truck’s total operational lifespan and reliability.

Key Features and Performance Advantages

Technical Specifications Table

Critical Role in Engine Longevity and Performance

The crankshaft is arguably the most stressed component in an engine. The 61560020029/61500020071 model is designed to handle the continuous firing pulses of a six-cylinder diesel, which impose cyclical bending and torsional loads. Its robust construction prevents fatigue failures like cracking, which typically originate at stress concentrators such as oil holes or fillet radii. The HRC 50 hardness ensures the journals maintain their precise roundness and surface finish over time, which is critical for maintaining oil pressure and preventing bearing wear. A worn crankshaft journal can lead to knocking sounds, low oil pressure, and ultimately, connecting rod or main bearing failure.

In the context of a commercial truck, the performance of this component directly influences fuel economy and power delivery. A perfectly balanced and true crankshaft, like the 61560020029/61500020071, allows the engine to run smoothly with minimal parasitic loss from internal friction and vibration. This efficiency translates to more power reaching the wheels and less energy wasted as heat and noise. For fleet managers, specifying this high-quality crankshaft during an inframe or major overhaul is a strategic decision that resets the engine’s core rotating assembly to like-new condition, ensuring dependable performance for another several hundred thousand kilometers.

Installation Considerations and Best Practices

Installing a 61560020029/61500020071 crankshaft is a complex engine rebuilding procedure that requires a clean environment, specialized tools, and technical expertise. The engine block’s main bearing saddles must be meticulously cleaned and inspected for alignment. New main bearings are installed, and the crankshaft is carefully lowered into place. Plastigage or a micrometer must be used to verify the exact oil clearance for each main and connecting rod journal, as specified by the engine manufacturer.

The main bearing caps are then torqued to specification in the correct sequence and stages. The crankshaft end play (thrust bearing clearance) must also be set correctly. Throughout the process, the journals and bearings must be kept liberally lubricated with assembly grease or oil to prevent startup scoring. It is highly recommended that this procedure be carried out by a qualified technician following the official SINOTRUK Howo service manual to avoid costly mistakes.

Applications and Compatibility

The 61560020029/61500020071 crankshaft is compatible with SINOTRUK Howo truck models equipped with the Weichai WD615 series engine, specifically those configured for Euro 2 and Euro 3 emissions standards. This covers a wide range of applications, including heavy-duty tractors for line-haul transport, robust dump trucks for construction and mining, concrete mixer trucks, and stationary power units. Its high durability makes it suitable for operations where the engine is subjected to constant high loads, frequent starts and stops, or extended periods at high RPM, such as in pump or compressor applications.

Why Choose the Genuine 61560020029/61500020071 Crankshaft?

Opting for the genuine part numbered 61560020029 or 61500020071 guarantees material quality, dimensional accuracy, and heat treatment integrity that aftermarket copies often fail to match. A substandard crankshaft can have hidden forging flaws, improper hardness, or imbalance issues that may lead to premature failure and catastrophic engine damage. The genuine Huatai crankshaft is produced under strict quality control, ensuring it meets the original engineering specifications for weight, balance, and strength.

For an engine rebuilder or fleet owner, this assurance is invaluable. It means the rebuilt engine will perform reliably, maintain proper oil pressure, and achieve its expected service life. The investment in a genuine crankshaft protects the significantly larger investment in the entire overhaul process and the vehicle itself.

Conclusion: The Foundation of Engine Durability

The 61560020029/61500020071 Crankshaft for the WD615 Euro 2/3 engine is more than just a replacement part; it is the foundational rotating member upon which engine reliability is built. Its forged strength, HRC 50 hardened surfaces, and precision balancing are engineered to deliver millions of reliable cycles under heavy load. When the time comes for a major engine overhaul, specifying this genuine, high-specification crankshaft is the most critical decision to ensure the longevity and performance of your SINOTRUK Howo’s powerplant.

Paired with quality bearings and professional installation, it restores the engine to its original power and efficiency, providing peace of mind for thousands of hours of operation. Trust in this OEM component to be the durable heart of your truck’s engine for the long haul.