Front Brake Inspection

CHECK BRAKE CYLINDER AND PISTON
CHECK PAD LINING THICKNESS
CHECK FRONT DISC BRAKE ANTI-RATTLE SPRING
CHECK DISC THICKNESS
CHECK DISC RUNOUT

Front Brake -- Inspection

1. CHECK BRAKE CYLINDER AND PISTON

Check the cylinder bore and piston for rust or scoring.
If necessary, replace the disc brake cylinder assembly.

2. CHECK PAD LINING THICKNESS

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

Using a ruler, measure the pad lining thickness.
Standard thickness:
11.3 mm (0.445 in.)
Minimum thickness:
1.0 mm (0.0394 in.)
If the pad lining thickness is less than the minimum, replace the pad.

3. CHECK FRONT DISC BRAKE ANTI-RATTLE SPRING

Use brake cleaner to clean the front disc brake anti-rattle spring. Check for deformation and cracks.

When installing the front disc brake anti-rattle spring to the front disc brake caliper, check that the spring force is applied to the hole pin and brake pad.

4. CHECK DISC THICKNESS

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

Using a micrometer, measure the disc thickness.
Standard thickness:
32.0 mm (1.26 in.)
Minimum thickness:
29.0 mm (1.14 in.)
If the disc thickness is less than the minimum, replace the disc.

5. CHECK DISC RUNOUT

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

Install the disc with the 6 hub nuts.
Torque:
112 N*m{1137 kgf*cm, 82 ft.*lbf}

Using a dial indicator, measure the disc runout 10 mm (0.394 in.) from the outer edge of the disc.
Maximum disc runout:
0.05 mm (0.00197 in.)
If the disc runout is more than the maximum, check the bearing play in the axial direction and the axle hub runout (LandCruiser RM000001IWW05VX_01_0021.html). If the bearing play and axle hub runout are normal, adjust the disc runout or grind the disc using an "On-car" brake lathe.

Remove the 6 hub nuts and front disc.