Clutch Booster Assembly 8-97166854-1 For ISUZU NQR75 NPR65 4HK1 4BD2 8980338370

Precision-engineered clutch booster reduces pedal effort using engine vacuum or air pressure, enabling smooth, responsive clutch engagement and disengagement for ISUZU NQR75 and NPR65 trucks.

The Clutch Booster Assembly (OEM Numbers: 8-97166854-1 / 8971668541 / 8-98033837-0 / 8980338370) is a premium-quality, direct replacement hydraulic component designed specifically for ISUZU NQR75 and NPR65 series medium-duty trucks equipped with 4BD2 and 4HK1 diesel engines. This precision-engineered booster is a critical component of the hydraulic clutch actuation system, responsible for reducing the pedal effort required to engage and disengage the clutch by utilizing engine vacuum or air pressure to amplify the driver's input.

• OE Quality: Manufactured to strict ISUZU dimensional and performance specifications for perfect fit and function
• Reduced Pedal Effort: Amplifies driver input for comfortable, fatigue-free clutch operation
• Durable Construction: Corrosion-resistant housing and high-quality diaphragm ensure long service life
• Smooth Clutch Operation: Provides precise, responsive clutch control for confident shifting
• Restores Shifting Performance: Eliminates heavy or spongy pedal feel and shifting difficulties
• Direct Replacement: Simple installation during clutch system service
• Long Service Life: Engineered for reliability in demanding commercial applications
• Cost-Effective Maintenance: Essential component for reliable clutch system performance

This clutch booster assembly is specifically designed for ISUZU medium-duty trucks. Common applications include:

• ISUZU NQR75 - Medium-Duty Trucks
• ISUZU NPR65 - Medium-Duty Trucks
• ISUZU NPR (various models with 4BD2/4HK1 engines)
• ISUZU NQR (various models with 4BD2/4HK1 engines)

• 4-Cylinder, Inline Diesel
• Displacement: 3.9L (3856cc)
• Naturally Aspirated / Turbocharged (4BD2T)
• Valvetrain: OHV

• 4-Cylinder, Inline Diesel
• Displacement: 5.2L (5193cc)
• Turbocharged, Intercooled
• Common Rail Fuel Injection

Vacuum-assisted hydraulic clutch actuation system compatible with standard ISUZU clutch configurations.

Professional installation required. Proper hydraulic system service is critical:

1. Disconnect battery - Disconnect the negative battery cable before beginning work
2. Drain clutch fluid - Drain the clutch fluid from the reservoir and system
3. Disconnect vacuum hose - Disconnect the vacuum supply hose from the booster
4. Disconnect hydraulic line - Carefully disconnect the clutch fluid line from the booster
5. Remove the old booster - Unbolt and remove the old clutch booster from the mounting bracket
6. Inspect the push rod - Check the push rod and clutch release mechanism for wear or damage; replace if necessary
7. Inspect vacuum hose - Check the vacuum hose for cracks or damage; replace if necessary
8. Clean the mounting area - Clean the mounting surface and surrounding area
9. Prepare the new booster - Inspect the new booster and verify it matches the original
10. Install the new booster - Position the new booster and secure with mounting bolts
11. Torque to specification - Tighten bolts to manufacturer specification
12. Reconnect vacuum hose - Reconnect the vacuum supply hose to the booster
13. Reconnect hydraulic line - Reconnect the clutch fluid line to the booster
14. Fill reservoir - Fill the master cylinder reservoir with the correct type of clutch/brake fluid
15. Bleed the system - Bleed the hydraulic clutch system to remove all air from the lines
16. Check pedal feel - Test the clutch pedal for proper feel and travel
17. Reconnect battery - Reconnect the battery
18. Test operation - Start the engine and test clutch engagement and shifting
19. Check for leaks - Inspect the booster and all connections for fluid or vacuum leaks
20. Road test - Test drive the vehicle to verify smooth clutch operation

• Material Verification: Confirms housing and diaphragm materials meet OE specifications
• Dimensional Inspection: Mounting points, push rod length, and overall dimensions verified against OEM tolerances
• Vacuum Integrity Testing: 100% tested for vacuum retention and leak-free operation
• Diaphragm Integrity Testing: Diaphragm flexibility and durability verified
• Performance Testing: Boost ratio and response verified under simulated operating conditions
• Corrosion Testing: Housing treated for corrosion resistance in demanding environments
• Visual Inspection: 100% checked for defects, machining flaws, or damage
• Packaged Safely: Protected and securely packaged to prevent damage and contamination 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.

For pricing, availability, or bulk purchase of the Clutch Booster Assembly 8-97166854-1 For ISUZU NQR75 NPR65 4HK1 4BD2 8980338370, please contact our sales team for a competitive quote and expert technical support.