Contents: Visual inspection of pad thickness ↓ Checking brake pads ↓ Measuring the thickness of the brake…↓ Measuring Brake Disc Runout ↓ Assembly ↓
Fig. 6.47. Disc brake mechanisms of the rear wheels of the Camry: 1 – flexible hose; 2 – gasket; 3 – guide pin; 4 – anther; 5 – bleed nipple; 6 – protective cap of the bleed nipple; 7 – oil seal; 8 – piston; 9 – piston dust cover
The disc brakes of the rear wheels of the Camry are shown in Figure 6.47.
Visual inspection of pad thickness
Check the thickness of the pads. To do this, lift the car, remove the wheel and look through the inspection hole in the cylinder body.
- Minimum thickness of brake pads: 1mm.
- Wear limit: 2.0 mm.
Drain the brake fluid.
Remove the front wheel and temporarily secure the wheel rim with two nuts.
Loosen the bolt and disconnect the brake hose bracket.
Fig. 6.48. Loosening the caliper mounting bolts
Holding the guide pins, unscrew the caliper mounting bolts (Fig. 6.48).
Fig. 6.49. Raising the caliper
Raise the caliper and secure it with wire (Fig. 6.49).
Remove two anti-squeal springs, two brake pads, two anti-squeal pads holding the plate liners.
Note: Anti-squeak springs and retaining inserts can be reused only if they are sufficiently elastic and free of deformation, cracks, rust or other defects.
Fig. 6.50. Removing the brake pad wear indicators
Using a thin-bladed screwdriver, remove the brake pad wear indicators (Fig. 6.50).
Loosen the mounting bolt and remove the caliper cover from the bracket.
Remove the two brake pads with anti-squeal linings and the two retaining plate liners.
Fig. 6.51. Removing the guide pins from the caliper housing
Remove the guide pin (Fig. 6.51).
Fig. 6.52. Removing the caliper housing
Unscrew 2 bolts and remove the caliper housing from the brake disc (Fig. 6.52).
Fig. 6.53. Removing the brake cylinder boot
Using a screwdriver, remove the brake cylinder boot spring ring and boot (Fig. 6.53).
Place a rag between the piston and the cylinder.
Fig. 6.54. Removing the piston from the cylinder
Using compressed air, remove the piston from the cylinder (Fig. 6.54).
Checking brake pads
Fig. 6.55. Measuring the thickness of brake shoe linings
Measure the thickness of the brake shoe linings with a ruler (Fig. 6.55).
- Standard thickness: 11 mm.
- Minimum thickness: 1.0 mm.
Measuring the thickness of the brake disc
Fig. 6.56. Measuring the thickness of the brake disc
Using a micrometer, measure the thickness of the brake disc (Fig. 6.56).
- Standard thickness: 12 mm
- Minimum thickness: 10.5 mm
Replace the disc if the disc thickness is less than the minimum allowable.
Measuring Brake Disc Runout
Fig. 6.57. Applying marks to the hub axle sleeve and brake disc
Apply marks to the brake disc and wheel hub axle bushing (Fig. 6.57).
Secure the brake disc to the wheel hub using wheel nuts (in 2 or more places).
Fig. 6.58. Checking the disc runout using an indicator
Check the runout with an indicator (Fig. 6.58).
Measurement point:
- at a distance of 10 mm from the outer edge of the disc.
- maximum runout: 0.15 mm or less.
Caution: Before taking measurements, make sure that the axial play is 0 mm.
If the runout is significant, find the point of minimum runout by successively shifting the installation position of the brake disc on the hub by one hole.
Assembly
Fig. 6.59. Installing the spring ring and brake cylinder boot
Using a screwdriver, install the brake cylinder boot spring ring and boot (Fig. 6.59).
When installing the spring ring, be careful not to damage the cover.
Install the guide pins.
Tightening torque: 39 Nm.
Using a socket wrench (8mm) and a hammer, install the guide pin dust boots.
Pre-lubricate the dust boots with lithium grease.
Install the caliper housing mounting bolts.
Tightening torque: 62 Nm.
Fig. 6.60. Installing the dust cover into the caliper cover
Install the guide pin boot into the caliper cover, after lubricating it with lithium grease (Fig. 6.60).
Install the guide pin into the caliper cover.
Fig. 6.61. Guide pin installation diagram
Lubricate the pin with lithium grease and, being careful not to damage the boot, insert it as shown in Figure 6.61.
Install a new set of brake pads.
Install the caliper cover.
Carry out the rest of the assembly in the reverse order of removal.
Install the rear wheels.
Check the brake fluid level.