Brake Master Cylinder Assembly with 24mm Bore Diameter Aluminum Construction OEM Direct Replacement for Hino Dutro Dyna

The Brake Master Cylinder Assembly with OEM number 47207-37052 (also listed as 47207-37051) is a verified direct-fit replacement for Hino Dutro and Toyota Dyna / Toyoace light-duty trucks. This critical component converts mechanical pedal force into hydraulic pressure for safe and controlled deceleration.

If your brake master cylinder is failing, you may experience one or more of the following symptoms:

• Soft or Spongy Brake Pedal: Pedal feels unusually soft or slowly sinks to the floor when held at a stop
• Sinking Pedal: Brake pedal continues to sink under steady pressure — indicates internal seal bypass
• Increased Stopping Distance: Vehicle takes longer to stop than normal, even with firm pedal pressure
• Brake Warning Light: Dashboard warning light illuminates with low fluid level and no visible external leaks
• Fluid Leakage: Brake fluid seeping from the cylinder body or into the brake booster

Pre-Installation Checklist:

• Reservoir not included — transfer the reservoir from your old master cylinder
• Brake fluid is highly corrosive — avoid contact with painted surfaces
• Inspect brake booster for fluid contamination (sign of internal master cylinder leakage)
• Bench bleed the new master cylinder before installation to remove air
• Always use fresh DOT 3 or DOT 4 brake fluid from a sealed container

Installation Guidelines (Reference workshop manual):

1. Disconnect the negative battery terminal
2. Siphon brake fluid from the reservoir
3. Disconnect the brake lines from the master cylinder (note positions for reinstallation)
4. Disconnect the electrical connector (if equipped with fluid level sensor)
5. Remove the mounting nuts securing the master cylinder to the brake booster
6. Remove the old master cylinder assembly
7. Transfer the reservoir from the old unit to the new master cylinder
8. Clean the booster mounting surface thoroughly
9. CRITICAL: Bench bleed the new master cylinder before installation
10. Install the new master cylinder onto the booster
11. Torque the mounting nuts to manufacturer's specified torque settings
12. Reconnect the brake lines and torque to specification
13. Refill the reservoir with fresh brake fluid
14. CRITICAL: Bleed the entire brake system in the correct sequence
15. Test brake pedal feel and check for leaks before road test

Maintenance Schedule:

• Inspection: Every 50,000 km / 12 months. Check brake pedal feel, fluid level, and inspect for leaks
• Fluid Replacement: Every 2 years or 40,000 km — replace brake fluid to prevent internal corrosion
• Replacement: Recommended immediately if failure symptoms appear

• Packaging: Each brake master cylinder is securely packed in a protective carton to prevent shipping damage
• Note: Reservoir tank is not included — must be transferred from the original unit
• Suitable for: Wholesale distributors, auto parts retailers, truck repair shops, and fleet owners