‌Genuine Sinotruk HOWO D7B Hydraulic Retarder Coolant Elbow 202V06303-5706 | High-Pressure Aluminum Alloy Coolant Transfer Pipe with Anti-Corrosion Coating

1. ‌Sinotruk HOWO Heavy-Duty Coolant Elbow Assembly - Part No. 202V06303-5706‌

   Precision-engineered for high-pressure cooling systems in hydraulic retarder applications, this OEM elbow ensures reliable coolant circulation under extreme thermal conditions:

   ‌Technical Specifications‌

   1. ‌Material Composition‌

      • Body: A356-T6 Aluminum Alloy (ASTM B26)
      • Sealing Surface: Electroless Nickel Plating (15-25μm)
      • Insulation Layer: Ceramic-Infused Thermal Coating

   2. ‌Performance Parameters‌

      • Operating Pressure: 2.5MPa Continuous / 4.0MPa Burst (SAE J2044)
      • Temperature Range: -40°C to +180°C (Short-term 220°C)
      • Flow Capacity: 120L/min @ 80kPa

   3. ‌Structural Design‌

      • Bore Diameter: 38mm ±0.1mm (ID Polished to Ra 1.6μm)
      • Bend Radius: 115mm (3D Hydraulic Optimized Shape)
      • Mounting Flange: 6x M10-1.5 Bolts (ISO 4014 Class 8.8)

   4. ‌Durability Features‌

      • Vibration Resistance: 15g RMS (ISO 16750-3)
      • Salt Spray Test: 1,000hrs Neutral Salt Spray (ASTM B117)
      • Thermal Cycling: 50,000 Cycles (-45°C ↔ +200°C)

   5. ‌Compatibility‌

      • Engine Models: D7B-340/380/420 Series
      • Retarder Systems: ZF Intarder 2200/2600
      • Truck Models: HOWO T7G/TH7/ZZ4257 (2020-2024)

   6. ‌Certifications‌

      • SAE J2534 Coolant System Compliance
      • ISO 4141-3 High-Pressure Fluid Standards
      • 100% Pressure/Leakage Tested

   
   

   ‌Why Choose This Part?

After-Sales Support:

• 24/7 technical consultation via WhatsApp/email
• 12-month warranty with free return policy
• Local service centers in 15+ countries