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Products Description
Sinotruk SITRAK Fan Clutch 202V06600-0005
| PART NUMBER: | 202V06600-0005 | SIZE: | |
| PART NAME: | Fan Clutch | WEIGHT: | |
| TRUCK MODEL: | SINOTRUK | TERMS OF PAYMENT: | T/T ,CAD ,L/C ,WESTERN UNION |
| PACKAGE MODEL: | CARTON BOX | TERMS OF DELIEVRY: | EXW , FOB,CIF,FCA , CPT ... |


Truck silicone oil shock absorbers: the "vibration stabilizer" of the crankshaft. Truck silicone oil shock absorbers are
core torsional vibration damping devices installed at the front end of the engine crankshaft. Their core function is to
absorb crankshaft torsional vibration energy, suppress resonance, and protect the crankshaft and surrounding components.
They are crucial components for ensuring smooth power and safety during heavy-duty transportation.
🔧 Core Structure (Truck Heavy-Duty Adapted Version)
Table: Components | Functions | Truck-Specific Features
Housing | Rigidly connected to the front end of the crankshaft, rotates with the crankshaft | Mostly made of stamped
steel/cast iron, high strength, impact resistant, suitable for high torque conditions
Inertia Ring | Provides large rotational inertia, stabilizes rotational speed | Annular mass block, concentrated mass,
ensures uniform rotation even under low-speed heavy loads
High-Viscosity Silicone Oil | Core damping medium, dissipates torsional vibration energy | Uses methyl silicone oil,
resistant to high and low temperatures (-40℃~120℃), stable shear damping
Alkali Film/Wear-Resistant Bushing | Supports the inertia ring, reduces friction and wear | Removable and replaceable,
reduces maintenance costs, suitable for frequent start-stop and bumpy conditions
End Caps and Seals | Seal the cavity to prevent silicone oil leakage | Uses an oil-resistant sealing structure to prevent
damping failure caused by oil leakage
Heat Dissipates heat converted from torsional vibration | Heat dissipation fins are welded to both sides of the housing to
avoid high temperature affecting silicone oil performance and rubber component aging
⚙️ Working Principle (Torsion Vibration Energy Conversion Mechanism)
Synchronous Rotation: The housing rotates together with the crankshaft, and the inertia ring rotates synchronously under
the viscous force of the silicone oil, maintaining stability based on the average crankshaft speed.
Torsion Vibration Response: When the crankshaft generates torsional vibration due to the periodic bursts of the cylinders,
a speed difference appears between the housing and the inertia ring.
Damping Energy Dissipation: The silicone oil film between the inertia ring and the housing undergoes shear deformation,
converting torsional vibration energy into heat energy and dissipating it, thus suppressing the vibration amplitude.
Heat Dissipation and Temperature Control: Heat is rapidly dissipated through the housing and heat sink, maintaining
stable silicone oil viscosity and ensuring a long-lasting and reliable damping effect.
🚛 Core Value in Truck Scenarios (Comparison with Ordinary Passenger Vehicles)
Anti-Resonance: Suitable for large-displacement diesel engines, preventing resonance between the torsional vibration
frequency and the crankshaft's natural frequency under idling, acceleration, and heavy-load conditions, preventing
crankshaft breakage and flywheel damage.
Noise Reduction and Smoothness: Significantly reduces engine operating noise and vibration, improving cab comfort
and reducing driver fatigue.
Extended lifespan: Protects crankshaft, timing gears, pulleys, and other peripheral components, reducing the probability
of major overhauls and lowering transportation and operating costs.
High reliability: Simple structure, no easily damaged parts, adaptable to complex operating conditions such as
long-distance heavy loads, high temperatures, and bumpy rides, with low maintenance costs.
⚠️ Common Faults and Identification Points
Oil Leakage Failure: Aging end cap seals lead to silicone oil leakage, manifesting as oil seepage at the front of the engine,
a sudden drop in vibration damping, and increased idling vibration.
Abnormal Noise: Wear of the inertia ring and bushing results in "clicking" or "humming" noises, more pronounced at
high speeds or during acceleration.
Excessive Vibration: Idling vibration, acceleration jerking, increased crankshaft front runout, potentially causing uneven
wear on the pulleys.
💡 Purchase and Maintenance Recommendations
Purchase: Match the engine model and torque parameters, prioritizing original equipment manufacturer (OEM) or
IATF16949 certified brands to ensure silicone oil purity and housing strength.
Maintenance: Regularly check for oil leaks and abnormal noises; replace directly if a fault is found, repair is not
recommended (as the precision of the seal and silicone oil is difficult to restore).
Replacement: When replacing, the crankshaft front end position must be calibrated to ensure coaxiality with the pulley
and timing system to avoid secondary vibration damage.
Summary: Truck silicone oil shock absorbers are key components for "stability and protection." The viscous properties
of silicone oil mitigate the risk of crankshaft torsional vibration, ensuring stable engine power output and reducing
operating costs, which is crucial for the safety of heavy-duty transportation.
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Product Advantages:
1. Superior Quality With Competitive Price.
2. Standard Packing Box , With Long Working Life.
3. 4 Steps Predelivery Inspection Before Delivery s.
4. Large Quantity Stock In Warehouse.
5. Long-Term Cooperation Relationship With shipping Forwarder To Guarantee th Smooth Shipping.
6. 24-Hour Service online.
7. More Details, Pls Feel Free To Contact Us .
Packing Details:
Sinotruk Howo Original Packaging, Strong And Durable, With Certain Protective Performance.
Sinotruk / Shacman / FOTON /FAW Truck Parts Original directly Sale in China .
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