HW19710 Tansmission Assy

Function, Specifications, Materials, and Key Parameters of HW19710 Transmission 

1. Function

• Multi-Gear Shifting: The HW19710 is a 10-speed manual transmission designed for heavy-duty commercial vehicles, offering a wide gear ratio range to optimize engine efficiency across diverse driving conditions (e.g., highway cruising, heavy loads, or steep inclines).

• High Torque Capacity: With a maximum input torque rating of1900 N·m, it is suitable for high-power diesel engines, ensuring reliable power transmission in demanding applications.

• Durable Design:

• Main Box: Features a dual countershaft design (or single countershaft in some variants) for enhanced load distribution and reduced gear wear.

• Auxiliary Box: Uses planetary gear mechanisms for smooth gear transitions and compact design.

• Optional Synchronizers: Some variants include full synchronizers for smoother shifting.

• Versatile Application:

• Matching Range: Compatible with vehicles rated at 336–420 horsepower.

• Optional PTO (Power Take-Off): Supports auxiliary equipment (e.g., hydraulic pumps, cranes) via optional rear PTO units.

2. Specifications

• Gear Ratios:

• 1st Gear: 14.284:1 (or 14.36:1 in some variants)

• 2nd Gear: 10.623:1 (or 10.66:1)

• 3rd Gear: 7.871:1 (or 7.88:1)

• 4th Gear: 5.876:1 (or 5.82:1)

• 5th Gear: 4.375:1

• 6th Gear: 3.265:1 (or 3.28:1)

• 7th Gear: 2.428:1 (or 2.44:1)

• 8th Gear: 1.799:1 (or 1.80:1)

• 9th Gear: 1.343:1 (or 1.33:1)

• 10th Gear: 1:1 (Direct Drive)

• Reverse 1: 13.913:1 (or 14.01:1)

• Reverse 2: 3.18:1 (or 3.20:1)

• Weight: ~355–430 kg (varies by configuration)

• Oil Capacity: 12–18 L (varies by variant)

• Shift Mechanism: Manual (non-synchronized or synchronized, depending on variant)

• Main Box Center Distance: 155 mm

3. Materials

• Gearbox Housing:

• Cast Iron (Standard): Provides high strength and durability for heavy-duty applications.

• Optional Aluminum Alloy: Reduces weight for improved fuel efficiency (where applicable).

• Gears and Shafts:

• High-Strength Alloy Steel: Ensures resistance to wear, fatigue, and high torque loads.

• Precision Machining: Maintains tight tolerances for smooth gear engagement and reduced noise.

• Bearings and Seals:

• High-Quality Bearings: Support heavy loads and high rotational speeds.

• Durable Seals: Prevent oil leakage and contamination.

4. Key Parameters

• Maximum Input Torque: 1900 N·m

• Power Rating: Suitable for engines rated at 336–420 hp

• Center Distance: 155 mm (main box)

• Gear Type: Helical gears with shot peening for improved strength

• Lubrication: Forced lubrication and gear splash lubrication

• Optional Features:

• Shift Assister: Reduces shifting effort.

• Rear PTO: Supports additional hydraulic or mechanical outputs.

• Aluminum Housing: Lightweight option for improved fuel economy.

Additional Notes

• AMT Variant Available: The HW19710AL (AMT) offers automated shifting with a slightly lower torque rating (1500 N·m) and revised gear ratios for improved fuel economy.

• Maintenance: Regular oil changes and inspections are recommended to ensure longevity.

• Compliance: Some variants may not meet newer emission standards (e.g., Euro VI) and are intended for export or off-road use.

The HW19710 transmission is engineered for reliability, efficiency, and versatility, making it a popular choice for heavy-duty commercial vehicles in China and beyond.