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The Dongfeng Truck Declutch Shift Shaft, also known as the Clutch Release Shaft or Clutch Fork Actuator Shaft, is a critical component in the manual transmission system of Dongfeng commercial vehicles. It facilitates smooth gear shifting by transferring the driver’s input (via the clutch pedal) to the clutch release mechanism, enabling disengagement of the clutch during gear changes. Engineered to Dongfeng’s OEM specifications, this shift shaft ensures precise operation, durability, and reliability under heavy-duty conditions.

Key Applications

• Compatible Dongfeng Truck Models:
  • EQ140, EQ145, EQ153, EQ1168, EQ1250, EQ2102, and other medium- to heavy-duty cargo trucks, dump trucks, buses, and military/special-purpose vehicles equipped with manual transmissions.
  • Ideal for applications requiring frequent gear shifting and clutch engagement (e.g., urban delivery, construction sites, or off-road operations).
• Industrial Use:
  • Retrofitting older vehicles, aftermarket transmission upgrades, or custom drivetrain modifications.

Technical Specifications

1. Material & Construction:
   • Primary Material:
     • Alloy steel (40Cr or 42CrMo) for the shaft body (heat-treated for strength and wear resistance).
     • Carbon steel (Q235 or equivalent) for brackets and mounting components.
   • Surface Treatment:
     • Zinc plating (yellow or white) for corrosion resistance (salt spray tested for 240+ hours).
     • Black oxide coating for interior components to reduce friction.
   • Bearing & Bushing:
     • Bronze bushings or self-lubricating bearings for low-friction operation.
     • Grease nipples (where applicable) for manual lubrication maintenance.
2. Key Dimensions (Example: Dongfeng EQ153 Declutch Shift Shaft):
   • Overall Length: ~300–450 mm (11.8–17.7 inches) (varies by transmission model).
   • Shaft Diameter: ~20–25 mm (0.79–0.98 inches).
   • Fork Arm Length: ~80–120 mm (3.15–4.72 inches) (for clutch fork attachment).
   • Mounting Hole Spacing: ~150–200 mm (5.9–7.9 inches) (center-to-center).
   • Weight: ~1.5–3.0 kg (3.3–6.6 lbs).
3. Design Features:
   • Precision-Ground Shaft: Ensures smooth rotational and linear motion.
   • Adjustable Clutch Fork: Allows fine-tuning of clutch engagement clearance.
   • Sealed Bushings: Prevents contamination and extends service life.
   • Reinforced Mounting Brackets: Withstands high torsional loads during shifting.
4. Performance Ratings:
   • Maximum Load Capacity: ~500–800 N (112–180 lb·f) (depending on model).
   • Operating Temperature Range: -30°C to +120°C (-22°F to +248°F).
   • Cycle Life: >500,000 clutch engagements (tested per Dongfeng internal standards).
   • Lateral Deflection: <0.5 mm (0.02 inches) under full load.