Front disc brake (Mitsubishi Space Star)

Fig. 15.41. Front disc brake: 1 - brake hose; 2 - sealing gasket; 3 - support; 4 - brake disc

Removal

1. Drain the brake fluid.

2. Remove the hollow bolt and disconnect the brake hose from the caliper.

3. Remove the sealing gaskets.

4. Remove the screws and remove the brake disc.

Installation

Installation is carried out in the reverse order of removal, taking into account the following.

1. To measure the rotating resistance torque after installing the brake pads, first measure the rotating resistance of the wheel hub bearing with the brake pads removed.

(1) Remove the drive shaft.
(2) Install the special tool into the hub as shown in Figure 15.42 and tighten it to the specified tightening torque.

Fig. 15.42. Installing a special tool in the hub to measure the moment of resistance to rotation of the wheel hub bearing with the brake pads removed

(3) Use a spring dynamometer to measure the moment of resistance to rotation of the hub bearing (Fig. 15.43).

Fig. 15.43. Using a spring dynamometer to measure the torque of a wheel hub bearing

2. After installing the caliper assembly onto the steering knuckle, install the brake pads assembly.

Warning: Do not allow oil, grease or other contaminants to come into contact with the working surfaces of the brake pads and brake disc.

3. If new brake pads are to be installed, press the piston into the caliper cylinder (Fig. 15.44). This can be done with a special tool or a hammer handle. Make sure that the piston is not warped and that the surfaces of the piston and dust boot are not damaged. When the piston is pressed in, the brake fluid is forced out of the brake cylinder into the reservoir. Therefore, constantly monitor the fluid level in the reservoir and, if necessary, pump it out.

Fig. 15.44. Using a special tool to press the piston into the caliper cylinder

4. Be careful not to damage the piston dust boot when lowering the caliper into place, then install the guide pin.

5. After installing new brake pads, measure the torque resistance:

[The material is based on data from the website: MitsubishiMan]

(1) Start the engine and press the brake pedal 2-3 times.
(2) Turn off the engine.
(3) Turn the brake disc 10 turns in the forward direction.

6. Using a spring dynamometer, measure the moment of resistance to rotation of the hub bearing (Fig. 15.45).

Fig. 15.45. Using a spring dynamometer to measure the torque of a wheel hub bearing

7. Calculate the moment of resistance to rotation of new brake pads as the difference between the moments during rotation of the hub with brake pads and without brake pads.

The moment of resistance to rotation of the disc brake: no more than 40 N

8. If the calculated torque difference exceeds the nominal value, replace the disc brake.