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OEM J3600-1005021 The crankshaft timing gear is a precision component that drives the camshaft and ensures perfect synchronization of engine valves with piston movement. The genuine SINOTRUK HOWO J3600-1005021 Crankshaft Timing Gear is an OEM‑grade component engineered for a perfect fit and long‑term durability. As a vital element of the trusted Sinotruk howo parts family, this timing gear is crafted with high-strength, heat-resistant materials to endure harsh, high-pressure conditions in truck engines—effectively protecting key components like valve trains and fuel injection pumps from timing errors and premature wear.
The J3600-1005021 gear is forged from premium alloy steel, heat-treated for exceptional tooth strength and resistance to fatigue under high engine loads.
Helical gear teeth are CNC hobbing and ground to exacting tolerances, ensuring quiet operation, minimal backlash, and accurate camshaft timing.
Case-hardening (carburizing) creates a hard, wear-resistant surface while maintaining a tough core to withstand shock loads.
Dynamically balanced to minimize vibration at high RPM, contributing to smoother engine operation and longer bearing life.
| Parameter | Specification | Details |
|---|---|---|
| OEM Part Number | J3600-1005021 | SINOTRUK HOWO Original |
| Product Name | Crankshaft Timing Gear | Engine front timing gear |
| Material | 20CrMnTi alloy steel (or equivalent) | Carburized case |
| Number of Teeth | 48 (typical for WD615) | Helical gear |
| Module / Pitch | 3.5 mm (typical) | Metric standard |
| Pressure Angle | 20° | Standard |
| Bore Diameter (crankshaft fit) | Φ70 mm (H7 tolerance) | Precision ground |
| Overall Diameter | ~185 mm | Tooth tip diameter |
| Face Width | 32 mm | Gear width |
| Hardness (case) | HRC 58-62 | Depth 0.8-1.2mm |
| Weight | ~2.8 kg | Precision balanced |
| Compatible Engines | SINOTRUK WD615, WD618, MC series | Front gear train |
The crankshaft timing gear is the master gear in the engine’s timing train. It drives the camshaft, injection pump, and other auxiliary gears, dictating valve timing and fuel delivery. A worn or damaged J3600-1005021 gear can cause loss of power, rough running, increased emissions, and even catastrophic engine failure if timing jumps. The genuine SINOTRUK HOWO gear is engineered with high-strength, heat-resistant materials to endure harsh, high-pressure conditions, ensuring precise timing for the engine’s life.
The J3600-1005021 gear is produced on CNC gear cutting and grinding machines. Tooth profile, lead, and spacing are held to micron-level accuracy (DIN 5 or better) for quiet, efficient power transmission.
Every batch of Sinotruk Howo Parts goes through strict testing against international standards (e.g., ISO, CE) and Sinotruk’s original specs. Gears are 100% inspected for tooth geometry and sample-tested for hardness and fatigue.
The development of the J3600-1005021 Crankshaft Timing Gear focused on providing a durable and reliable master timing component under the most severe engine conditions. These gears endure millions of stress cycles and high temperatures. A failed gear can cause expensive downtime and repairs. This genuine component is engineered to maintain its precision and strength for hundreds of thousands of kilometers.
The metallurgy of the J3600-1005021 is critical. The alloy steel forging is rough machined, then carburized to create a hard, wear-resistant case while retaining a tough core. The gear teeth are then precision-ground to achieve the exact geometry required for smooth, quiet meshing with mating gears. The final product is dynamically balanced to minimize engine vibration.
Quality control for the J3600-1005021 is exhaustive. In addition to 100% dimensional inspection, sample gears are tested for surface hardness, case depth, and core toughness. They are also subjected to gear rolling tests to verify smooth engagement and minimal runout. Only components that pass all these rigorous checks are approved for shipment as genuine Sinotruk Howo parts.
A failing crankshaft timing gear can cause a range of issues. Symptoms include a whining noise from the front of the engine, difficulty starting, loss of power, rough idling, or illuminated check engine light due to timing errors. During major engine overhauls, the timing gear should be inspected for tooth wear, pitting, or cracks. If any issues are found, immediate replacement with a genuine J3600-1005021 gear is recommended to prevent catastrophic engine damage.
Installation requires expert knowledge. The old gear is removed from the crankshaft using a puller. The new J3600-1005021 gear is heated (typically to 150-200°C) for expansion and then pressed or shrunk onto the crankshaft. The keyway must align perfectly. Timing marks on the gear must be correctly aligned with the camshaft gear for proper engine timing.
Field performance of the J3600-1005021 gear has proven its exceptional reliability. In a study of over 300 Howo trucks in long-haul service, no timing gear failures were reported within the first 600,000 km. This reliability translates directly to reduced downtime and lower operating costs for fleet operators, helping maintain consistent engine performance even during heavy-load or long-distance operations.
For parts managers, the J3600-1005021 crankshaft timing gears are available individually, each with a lot traceability label. Bulk orders (10+ units) receive additional packaging discounts and priority handling. The gears are packaged in rust-inhibiting paper and foam-lined cartons to prevent transit damage.
Warranty and support for the J3600-1005021 are comprehensive. SINOTRUK HOWO provides a 2‑year/unlimited mileage warranty against manufacturing defects. Our technical support team is available via email to answer any questions regarding installation or compatibility, and we are committed to providing a response within 24 hours.
When ordering, always verify your engine model and timing gear specifications. The J3600-1005021 is designed for specific applications within the WD615/MC engine family. Using the correct part ensures a perfect fit and optimal timing performance, ensuring seamless installation without extra modifications.
In summary, the J3600-1005021 Crankshaft Timing Gear is a vital component for ensuring the power, efficiency, and longevity of your SINOTRUK HOWO truck’s engine. Its premium materials, precision manufacturing, and rigorous testing make it the preferred choice for timing gears. Trust the genuine J3600-1005021 – it keeps your engine in perfect time.
During major engine overhauls, always inspect the timing gear for wear, chipped teeth, or looseness on the crankshaft. Replace the gear if any doubt exists. Always use genuine J3600-1005021 and follow the correct heating and installation procedure.
Generic aftermarket timing gears often have poor metallurgy, inaccurate tooth profiles, or inadequate heat treatment, leading to noise, rapid wear, and timing errors. The genuine J3600-1005021 is engineered to exact specifications with premium materials, ensuring a perfect fit and reliable performance, backed by factory-direct quality and customization options if needed.
Generic aftermarket timing gears often have poor metallurgy, inaccurate tooth profiles, or inadequate heat treatment, leading to excessive noise, rapid wear, and timing errors that can cause severe engine damage. The genuine SINOTRUK HOWO J3600-1005021 Crankshaft Timing Gear is manufactured under strict quality controls, undergoing rigorous testing against international standards (e.g., ISO, CE) and Sinotruk’s original specs. Using premium materials and precision manufacturing ensures it withstands the extreme demands of heavy‑duty operation, delivering consistent performance and long life. This commitment to quality, combined with options for customization and small order acceptance, makes it the smart choice for maintaining your Howo truck.
By choosing the authentic part, you protect your investment and ensure your engine performs reliably for years to come. For fleet managers and owner‑operators who demand the best, the genuine J3600-1005021 is the only responsible choice.
J3600-1005021 – 100% Genuine SINOTRUK HOWO Crankshaft Timing Gear • Keep your engine in perfect time • No forms, just quality parts.