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Type :
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Clutch release bearing
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Specification :
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Pulley :
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Brand :
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NUOJIN
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Number :
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68239967AA-804597
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Quality :
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new
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Delivery time :
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30 days
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The installation of a Fiat clutch release bearing follows the standard procedure of Safe Disassembly → Cleaning & Inspection → Positioning & Installation → Assembly & Reset → Testing & Acceptance. It is mainly applicable to two mainstream structures: diaphragm spring type and concentric slave cylinder (CSC) type, and must be carried out in strict accordance with the torque and clearance specifications of the specific model. Below is the complete installation method and model-specific key points suitable for common Fiat models (e.g., 500, Punto, Fiorino, etc.).
Park the vehicle securely, engage the parking brake, shift to neutral gear, and disconnect the negative terminal of the 12V battery to prevent short circuits. Support the vehicle firmly with a lift, and place a support base under the gearbox.
For some Fiat models (e.g., those with CSC structure), drain the hydraulic clutch system fluid first to avoid leakage during disassembly.
Verify that the release bearing model matches the clutch type (diaphragm spring/CSC). Check that the bearing rotates smoothly without jamming or abnormal noise, and the sealing ring is free from damage.
Inspect the condition of the release fork, guide sleeve and return spring; replace any worn or deformed components. For CSC models, replace the entire assembly—do not replace the bearing alone.
Remove the gearbox, take off the release fork shaft rocker arm, use snap ring pliers to remove the locating snap ring/rolling pin, and detach the release bearing from the guide sleeve.
Clean the guide sleeve, release fork and mounting surface to remove oil stains, rust and impurities. Check that the locating groove/rolling pin hole is free from damage.
Apply a small amount of heat-resistant grease to the guide sleeve, slide the bearing onto the sleeve in the direction indicated by the mark, and lock it in place with the locating snap ring/rolling pin to ensure no axial movement.
Install the release fork to fit evenly against the end face of the bearing, and adjust the clearance between the fork and the bearing (common Fiat specification: 0.5–1.2 mm, subject to the service manual).
Pre-tighten the release fork shaft fixing bolts according to the model specification (typically 8–12 N·m).
Reinstall the gearbox in the reverse order of disassembly. Torque specifications: gearbox housing bolts 25–35 N·m; release fork shaft rocker arm bolts 10–14 N·m.
Fill the system with hydraulic fluid, bleed the air, and ensure the clutch pedal travel is normal.
Remove the gearbox, take off the CSC assembly (hydraulic cylinder + release bearing), and clean the guide surface of the gearbox input shaft and the locating surface of the flywheel housing.
Check that the input shaft splines are free from wear, and the locating pin holes are not deformed.
Apply the specified special grease to the guide surface of the new CSC assembly, align it with the input shaft and locating pins of the gearbox, push it into place smoothly, and lock the snap ring securely.
Connect the hydraulic oil pipe, pre-tighten the joint to the specified torque (6–8 N·m), and do not bend the oil pipe.
Static Inspection: Verify that the clutch pedal free travel is within the normal Fiat specification (15–25 mm), the bearing rotates without jamming, and the release fork moves smoothly.
Dynamic Testing: Start the engine, shift through all gears to confirm smooth shifting and complete clutch disengagement; check for no bearing noise or hydraulic leakage, and no pedal travel attenuation during continuous pedal operation.
Long-term Protection: Apply anti-rust agent to the bolt threads and bearing end face. Regularly inspect the hydraulic fluid level and bearing condition during use.
Before installation, ensure the vehicle is parked securely, the parking brake is engaged, and the gear is shifted to neutral. Disconnect the negative terminal of the 12V battery. When using a lift, lock the safety latches and install a support base under the gearbox to prevent it from falling and causing injury.
For some Fiat models (such as 500 and Fiorino equipped with Concentric Slave Cylinder - CSC), drain the hydraulic clutch system fluid first to avoid fluid leakage during disassembly, which could contaminate components or disrupt operations.
Perform operations only after the engine and gearbox have cooled completely to prevent burns from hot components.
The release bearing model must strictly match the vehicle model and clutch type (diaphragm spring type/CSC integrated type). For CSC models, do not replace the bearing alone; the entire assembly must be replaced, otherwise hydraulic leakage and incomplete clutch disengagement may occur.
Check that the new bearing rotates smoothly without jamming or abnormal noise, and the sealing ring is free from damage or deformation. Inspect the wear and deformation of the release fork, guide sleeve, and return spring simultaneously. Replace aged components to avoid secondary failures.
Thoroughly clean the guide sleeve, release fork, and mounting locating grooves to remove oil, rust, and impurities. Residual impurities can cause bearing jamming, abnormal noise, or accelerated wear.
Apply only a small amount of special heat-resistant grease to the surface of the guide sleeve. Do not apply grease to the bearing working surface or clutch friction disc, as this will cause clutch slippage.
Before installing the CSC assembly, apply the factory-specified grease to its guide surface to ensure smooth axial sliding.
References：
This document is a comprehensive technical summary integrated from Fiat’s official service manuals, industry - universal technical standards and practical operation experience, rather than a direct excerpt from a single public web page. The detailed source explanation is as follows:
Component Manufacturer Technical Documents: Cover the selection of release bearings (including CSC), sealing ring inspection and grease application specifications, which are used to verify the key points of component inspection and protection.
Industry Maintenance Platforms (e.g., Autohome, PCauto): Refer to the general installation procedures of starters/clutches and fault - troubleshooting logic to verify the universality of operations such as disassembly/assembly safety, hydraulic system bleeding and clearance adjustment.
Front - line Maintenance Practical Experience: Integrate the model - specific disassembly/assembly pain points of Fiat vehicles, such as leak - proof measures for oil pipe joints of CSC - equipped models, release fork clearance adjustment for Punto, and flywheel ring gear inspection for diesel - powered Fiorino, to adapt to on - site operation scenarios.
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