Brake Vacuum Booster with High-Quality Synthetic Rubber Diaphragm and Corrosion-Resistant Steel Housing for ISUZU FTR113 FV515 Direct OEM Replacement

Heavy-duty brake vacuum booster amplifies driver pedal force using vacuum pressure, ensuring powerful, responsive braking performance for ISUZU FTR113 and FV515 trucks.

The Brake Vacuum Booster (OEM Numbers: 1-47800404-2 / 1478004042) is a premium-quality, direct replacement braking system component designed specifically for ISUZU FTR113 and FV515 series heavy-duty trucks.

• OE Quality: Manufactured to strict ISUZU dimensional and performance specifications for perfect fit and function
• Powerful Brake Assist: Amplifies driver pedal force for responsive, confident braking
• Durable Construction: Corrosion-resistant housing and high-quality diaphragm ensure long service life
• Effective Sealing: Maintains vacuum integrity for consistent, reliable brake performance
• Restores Braking Performance: Eliminates hard pedal feel and increased stopping distances
• Enhances Driver Comfort: Reduces pedal effort for more comfortable driving
• Critical Safety Component: Essential for safe commercial vehicle operation
• Direct Replacement: Simple installation during brake system service
• Regulatory Compliance: Meets applicable commercial vehicle safety standards
• Long Service Life: Engineered for reliability in demanding commercial applications

This brake vacuum booster is specifically designed for ISUZU heavy-duty trucks. Common applications include:

• ISUZU FTR113 – Heavy-Duty Trucks
• ISUZU FV515 – Heavy-Duty Trucks
• ISUZU FTR – Various models with compatible brake systems
• ISUZU FV – Various models with compatible brake systems

• Various ISUZU heavy-duty diesel engine configurations including 6HK1
• Verify compatibility with your vehicle's specific powertrain

• Vacuum-assisted hydraulic brake systems
• Air-over-hydraulic brake systems

1. Disconnect battery – Disconnect the negative battery cable before beginning work
2. Depressurize the brake system – Pump the brake pedal several times to release vacuum pressure
3. Remove the master cylinder – Carefully unbolt and remove the master cylinder from the booster
4. Disconnect vacuum hose – Disconnect the vacuum supply hose from the booster
5. Remove the old booster – Unbolt and remove the brake booster from the firewall
6. Inspect the brake pedal linkage – Check the push rod and pedal linkage for wear or damage
7. Inspect vacuum hose – Check the vacuum supply hose for cracks, soft spots, or damage
8. Check the check valve – Verify the one-way check valve functions properly
9. Clean mounting area – Clean the firewall mounting surface and surrounding area
10. Prepare the new booster – Inspect the new booster and verify it matches the original
11. Adjust push rod length – Adjust the push rod length to match the original booster
12. Install the new booster – Position the new booster on the firewall and secure with mounting bolts
13. Torque to specification – Tighten mounting nuts to manufacturer specification
14. Reconnect vacuum hose – Reconnect the vacuum supply hose to the booster
15. Reinstall the master cylinder – Reinstall the master cylinder onto the new booster
16. Reconnect brake lines – Reconnect brake lines if they were disconnected
17. Reconnect battery – Reconnect the negative battery cable
18. Bleed the brake system – Bleed the brake system if brake lines were opened
19. Test operation – Start the engine and test brake pedal feel and booster operation
20. Check for leaks – Inspect all connections for vacuum or fluid leaks
21. Road test – Test drive the vehicle to verify proper braking performance

• Material Verification: Confirms housing steel 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