Brake Air Booster MK321264 For Mitsubishi Fuso FV515 FK415 Heavy Truck Brake System

The Brake Air Booster (OEM Number: MK321264) is a premium-quality, direct replacement air brake master booster assembly designed specifically for Mitsubishi Fuso FV515 heavy-duty trucks. This compact brake air booster uses compressed air to multiply brake pedal force, ensuring powerful, responsive braking under demanding load conditions.

• OE Quality: Manufactured to strict Mitsubishi Fuso dimensional and material specifications
• High-Strength Construction: Steel shell and aluminum alloy components withstand high pressures
• Powerful Brake Boost: Compressed air amplification ensures strong, responsive braking
• Compact Short Version: Designed for specific mounting configurations where space is limited
• Leak-Proof Design: Precision seals and valves prevent air leakage
• Direct Replacement: Matches OE mounting flange, air line connections, and brake master cylinder interface
• Long Service Life: Engineered for heavy-duty commercial truck applications
• Essential Safety Component: Critical for reliable braking performance and vehicle safety

• Mitsubishi Fuso FV515 (Heavy-Duty Trucks)
• Mitsubishi Fuso FV517 (Heavy-Duty Trucks)
• Mitsubishi Fuso FK415 (Medium-Duty Trucks)
• Mitsubishi Fuso FK515 (Medium-Duty Trucks)
• Mitsubishi Fuso FV413 (Heavy-Duty Trucks)
• Mitsubishi Fuso FV415 (Heavy-Duty Trucks)
• Mitsubishi Fuso 113 series

• Mitsubishi 8DC9 - V8 Diesel Engine
• Mitsubishi 6D22 - Inline-6 Diesel Engine
• Mitsubishi 6D16 - Inline-6 Diesel Engine
• Mitsubishi 6M70 - Inline-6 Diesel Engine
• Mitsubishi T850 - Diesel Engine

Professional mechanic or brake system specialist installation is strongly recommended:

1. Ensure vehicle is safely parked - Apply parking brake and chock wheels. Relieve air system pressure
2. Disconnect battery - Always disconnect the negative terminal before working
3. Locate the brake air booster - Typically mounted on firewall or brake master cylinder bracket
4. Disconnect air lines - Carefully disconnect air inlet and outlet lines; cap lines to prevent contamination
5. Disconnect brake master cylinder - Unbolt from booster if required
6. Remove mounting bolts - Unbolt old booster from mounting bracket
7. Remove old booster - Note orientation and connection points
8. Clean mounting area - Remove dirt, oil, and debris
9. Install new booster - Position on mounting bracket; align bolt holes
10. Install mounting bolts - Tighten to manufacturer torque specifications
11. Reconnect brake master cylinder - Tighten mounting bolts to specification
12. Reconnect air lines - Attach air inlet and outlet lines; tighten fittings securely
13. Reconnect battery - Reconnect negative terminal
14. Pressurize air system - Start engine and allow air pressure to build; check for leaks
15. Bleed brake system - Remove air from hydraulic brake system
16. Test brake pedal - Verify smooth, assisted operation and proper pedal feel
17. Road test - Test brakes at low speed in safe area; verify proper stopping performance

• Material Verification: Confirms steel shell and aluminum alloy composition meet specifications
• Pressure Testing: Each booster tested for air leak-proof integrity under operating pressure
• Functional Testing: Booster operation and boost pressure verified to OE specifications
• Dimensional Inspection: Mounting points, air ports, and overall dimensions verified for exact fit
• Seal Inspection: All seals and diaphragms checked for proper fit and material quality
• Visual Inspection: 100% checked for casting defects, machining flaws, or damage
• Packaged Safely: Protected and 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