Load Sensing Brake Force Redistribution Valve (Mazda BT-50 (1))

Examination

Note: Before checking, make sure the fuel tank is full, all systems are filled with the rated amount of fluid, and the spare tire, tools and jack are in place.

1. Place the vehicle on a level, horizontal surface.

2. Check tire wear and tire pressure. Replace tires and/or adjust tire pressure if necessary.

3. Connect the pressure gauges to the front wheel caliper nipples and the rear wheel slave cylinder. Bleed the assembled system using valve "A".



4. Slowly depress the brake pedal until the pressure in the front wheel circuit reaches 4900 kPa.

5. Measure the pressure in the rear wheel circuit.

Pressure:

• models without ABS - 2250 - 2850 kPa
• models with ABS — 2650 - 3450 kPa

6. Press the brake pedal and increase the pressure in the front wheel circuit to 9800 bPa.



7. Measure the pressure in the rear wheel circuit.

Pressure:

• models without ABS - 3130 - 3930 kPa
• models with ABS — 4700 - 5900 kPa

8. If the pressure in the rear wheel circuit is not correct, adjust it.

Adjustment

Note: Before making adjustments, make sure the fuel tank is full, all systems are filled with the rated amount of fluid, and the spare tire, tool, and jack are in their proper places.

1. Loosen the nuts shown in the figure and move the adjusting lever to adjust the length of the spring.

• Nominal length - 175.5-182.5 mm

Note: When the spring length changes by 5 mm, the pressure changes by the value shown in the tables below.

Note: when the length of the spring decreases, the pressure decreases; when the length increases, the pressure increases.

2. Tighten the nut.

• Tightening torque - 19 - 59 Nm

3. After adjustment, repeat the checking procedure.

If necessary, replace the brake force distribution valve depending on the load.

Removal and installation

Attention:

• Do not disassemble the load-sensing brake force distribution valve.
• Do not rotate nut "A".

Remove the parts in the order of the numbers in the assembly drawing "Removing and installing the load-sensing brake force distribution valve".

Note:

• Installation is carried out in the reverse order of removal.
• After installation, perform the spring length adjustment procedure.

Installation Note

When connecting the brake pipes to the brake force distribution valve, align the marks on the pipes and the valve.