NISSAN 30537-40P00 Clutch Fork Pivot Pin

The genuine NISSAN (SKU: 30537-40P00) clutch fork pivot pin (OEM raw name: 'PIN-BALL') is a critical, precision mounting and pivot component in the clutch system of manual transmission vehicles. This compact yet highly stressed mechanical part provides a stable and low-friction pivot point for the clutch fork, through which the release bearing is actuated during clutch operation.

Operating Principle and Importance

When the driver presses the clutch pedal, the hydraulic or mechanical actuation system applies force to the clutch fork. Pivoting on this spherical-head pivot pin, the clutch fork transfers movement to the release bearing, which ultimately disengages the clutch assembly. The ball-end design of the pivot pin allows smooth, backlash-free, and precise bidirectional articulation of the fork.

Common Symptoms of Wear or Failure

The clutch fork pivot pin is subjected to continuous friction and elevated temperatures within the transmission bellhousing. Over time, loss of lubrication or natural wear from metal-to-metal contact can lead to the following issues:

• Stiff clutch pedal: Increased friction causes the pedal travel to become heavy, rough, or sticky.
• Squeaking or clicking noises: Mechanical sounds when pressing or releasing the clutch pedal indicate dry surfaces or wear on the ball head.
• Incomplete clutch disengagement: If the pin head wears substantially or deforms, the clutch fork geometry is altered, hindering smooth gear shifting.
• Pivot pin breakage: Under extreme conditions, material fatigue may cause the pin to snap, leading to immediate and complete failure of the clutch system.

Technical Specifications

• Material Quality: High-strength hardened alloy steel to maximize wear resistance and withstand high surface contact pressures.
• Design: Precision-machined ball stud end for optimal fitment and minimal friction.
• Installation Location: Inside the transmission bellhousing, functioning as the pivot point for the clutch fork.
• Maintenance Recommendation: Whenever replacing the clutch kit or release bearing, inspecting the pivot pin, lubricating it with appropriate high-temperature grease, and replacing it if worn is strongly recommended.