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The Dongfeng Truck 440 Middle Axle Basin Gear is a vital component of the intermediate (tandem) axle differential system, designed for Dongfeng’s heavy-duty multi-axle trucks (e.g., 6×4, 8×4, or 10×4 configurations). This gear ensures seamless torque distribution between the driving axles, enabling superior traction, load-bearing capacity, and maneuverability in challenging conditions such as off-road operations, heavy hauling, and construction. Built to Dongfeng’s stringent engineering standards, the 440 middle axle basin gear delivers reliability, durability, and compatibility with Dongfeng’s advanced drivetrain systems.

Key Specifications

1. Application Compatibility:
   • Vehicle Models: Fits Dongfeng’s DFL, DFH, and KR/TR series heavy-duty trucks with tandem or tri-axle configurations (e.g., dump trucks, tractors, cement mixers, and logging vehicles).
   • Axle Type: Designed for Dongfeng’s 440 series intermediate axles (e.g., 440B/440C models).
2. Gear Ratio:
   • Standard Ratio: 1.00:1 (direct drive, common for tandem axle setups).
   • Optional Ratios: Customizable for inter-axle differential lock systems (e.g., 1.15:1 for torque-biasing applications).
3. Material & Construction:
   • Gear Material: High-strength alloy steel (e.g., 20CrMnTiH or equivalent) with carburizing and precision grinding for enhanced wear resistance.
   • Tooth Profile: Spiral bevel gear design for quiet operation, reduced vibration, and improved load distribution.
   • Surface Treatment: Nitriding and shot peening for fatigue strength and corrosion resistance.
4. Dimensions:
   • Outer Diameter: ~320–360 mm (12.6–14.2 inches) (varies by configuration).
   • Module: 8–10 (metric sizing).
   • Face Width: 45–55 mm (1.77–2.17 inches).
   • Weight: ~16–20 kg (35–44 lbs) (depending on ratio and design).
5. Torque Capacity:
   • Maximum Input Torque: Up to 6,000 N·m (4,425 lb·ft) (suitable for engines up to 550 hp).
   • Load Rating: Designed for GAWR (Gross Axle Weight Rating) of 13,000–16,000 kg (28,600–35,200 lbs) per intermediate axle.
6. Lubrication:
   • Recommended Oil: API GL-5 or SAE 85W-140 gear oil.
   • Oil Capacity: ~2.8–3.2 liters (0.74–0.85 gallons) for the intermediate differential housing.

Technical Features

1. High-Efficiency Torque Distribution:
   • Precision-engineered tooth profiles minimize power loss and ensure smooth operation, even under heavy loads.
   • Helical gear geometry reduces noise by up to 12 dB compared to straight-cut designs.
2. Durability & Reliability:
   • Heat-treated gears resist pitting, scoring, and fatigue in high-stress applications.
   • Corrosion-resistant coatings extend service life in harsh environments (e.g., dust, mud, or salt exposure).
3. Interchangeability:
   • Direct replacement for OEM part number Dongfeng 440 Middle Axle Basin Gear, ensuring compatibility with existing Dongfeng intermediate axle assemblies.
   • Compatible with aftermarket differential carriers, bearings, and seals.
4. Serviceability:
   • Modular design for easy disassembly, inspection, and maintenance.
   • Adjustable backlash settings for optimal gear meshing.

Applications

• Heavy-Duty Transportation:
  • 6×4/8×4 tractors, lowboy trailers, and oversized cargo carriers.
• Construction & Mining:
  • Articulated dump trucks, rock haulers, and mobile cranes.
• Logging & Forestry:
  • Timber trucks and all-terrain log carriers.
• Military & Specialized:
  • Armored vehicles, recovery trucks, and off-road utility vehicles.