NISSAN 30620-VB00A Clutch Slave Cylinder

The genuine NISSAN 30620-VB00A (alternative part number: 30620VB003) clutch slave cylinder (Cylinder-Assy) is a key component of the vehicle's hydraulic clutch system. Its function is to convert the hydraulic pressure coming from the clutch master cylinder into mechanical movement when the clutch pedal is depressed, thereby operating the release fork and release bearing to disengage the clutch.

Technical Characteristics and Construction

• Manufacturer: NISSAN OEM
• Part Number: 30620-VB00A (Alternative part number: 30620VB003)
• Component Type: Hydraulic Clutch Slave Cylinder
• Material Composition: Precision-machined, high-strength metal housing for maximum pressure resistance, equipped with special wear-resistant internal rubber seals resistant to brake fluid.
• Operating Principle: Single-acting hydraulic piston cylinder.

Role and Importance of the Clutch Slave Cylinder

The clutch slave cylinder is directly responsible for smooth gear shifting. Because the system operates under high hydraulic pressure, the precise fit of the component's internal seals and piston is essential to prevent pressure loss. The genuine Nissan part guarantees perfect compatibility, long service life, and reliable operation under extreme temperature and load conditions.

Typical Symptoms of Failure

The clutch slave cylinder is subject to natural wear. The most common signs of failure include:

• Fluid Leakage: Brake fluid leaks appearing around the slave cylinder or beneath the rubber dust boot.
• Soft or Sinking Clutch Pedal: If air enters the system or the internal seals bypass, pedal resistance drops significantly.
• Difficult Gear Shifting: If the slave cylinder cannot provide sufficient travel stroke, the clutch will not fully disengage, causing hard gear changes.
• Low Fluid Level: Continuous drop in the brake fluid reservoir level supplying the clutch hydraulic circuit.