GCr15 Chrome Steel Clutch Release Bearing ZA-78TKL4001AR Precision Grade P0/P6/P5/P4 Direct OEM Replacement for ISUZU NPR NKR 4HF1 4HG1 Truck

Premium-quality NSK clutch release bearing enables smooth clutch engagement and disengagement, reducing wear on drivetrain components for reliable shifting in ISUZU NPR and NKR trucks.

• OE Quality: Manufactured by NSK to strict dimensional and performance specifications for perfect fit and function
• Premium Material: High-quality GCr15 chrome steel provides exceptional hardness, wear resistance, and durability
• Precision Dimensions: 40mm inner diameter, 89mm outer diameter, 31.9mm height for exact fitment
• Low-Noise Operation: Advanced manufacturing ensures smooth, quiet performance
• High-Load Capacity: Engineered to withstand demanding commercial applications
• Wide Temperature Range: Reliable operation from -40°C to +160°C
• Long Service Life: Durable construction for extended service intervals
• Direct Replacement: Simple installation during clutch system service
• 1-Year Warranty: Quality assurance for peace of mind

This clutch release bearing is specifically designed for ISUZU trucks with the following applications:

• ISUZU NPR – Medium-Duty Trucks (NPR_6)
• ISUZU NKR – Light to Medium-Duty Trucks (NKR6_, NKR7_, NKS7_)
• ISUZU ELF – Light to Medium-Duty Trucks (NHR6_)
• ISUZU ELF Platform/Chassis – NKR8_, NKQ8_ (2003/10 - )

• ISUZU 4HF1 – 4.3L Diesel Engine
• ISUZU 4HG1 – 4.6L Diesel Engine
• ISUZU 4HJ1 – Diesel Engine
• ISUZU 4BD2 – 3.9L Diesel Engine

1992 - 2004 (Various Models)

Professional installation required. Proper clutch system service is critical:

1. Disconnect battery – Disconnect the negative battery cable before beginning work
2. Remove the transmission – Safely remove the transmission assembly from the vehicle
3. Remove the old release bearing – Remove the release fork clips and release the bearing from the fork
4. Inspect the release fork – Check the fork for wear or damage; replace if necessary
5. Inspect the clutch components – Check the clutch disc, pressure plate, and flywheel for wear; replace as a set if needed
6. Clean the bearing housing – Clean the transmission input shaft bearing cover and surrounding area
7. Inspect the new bearing – Verify the new bearing matches the original in dimensions and specifications
8. Apply grease (if required) – Apply a thin coat of high-temperature grease to the bearing contact surfaces if specified
9. Install the new release bearing – Attach the bearing to the release fork and secure with clips
10. Lubricate contact points – Apply high-temperature grease to the fork pivot and contact points (if specified)
11. Reinstall the transmission – Reinstall the transmission assembly
12. Adjust clutch free play – Adjust the clutch pedal free play per manufacturer specifications
13. Reconnect battery – Reconnect the battery
14. Test operation – Test clutch pedal feel and shifting operation
15. Road test – Test drive the vehicle to verify smooth clutch engagement and gear changes

• Material Verification: Confirms GCr15 chrome steel composition meets OE specifications
• Dimensional Inspection: Inner diameter (40mm), outer diameter (89mm), and height (31.9mm) verified against OEM tolerances
• Hardness Testing: Material hardness verified for wear resistance and durability
• Precision Testing: Precision grade verified (P0/P6/P5/P4)
• Noise Testing: Bearing operation verified for low-noise performance
• Load Testing: High-load capacity verified through rigorous testing
• Seal Integrity Testing: 2RS seal effectiveness verified for lubrication retention and contamination exclusion
• Visual Inspection: 100% checked for defects, surface imperfections, or damage
• Packaged Safely: Protected and securely packaged to prevent damage during transit

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea