Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Brake Disc

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REMOVAL & INSTALLATION




CAUTION
Brake pads may contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.

  1. Disconnect the ABS speed sensor from the knuckle if equipped.
  2.  
  3. Remove the brake pads and the caliper.
  4.  
  5. Check the disc run-out at this point. Make a note of the results for use during installation. Refer to the inspection procedure.
  6.  
  7. Remove the grease cap from the hub. Remove the cotter pin and the castellated nut.
  8.  
  9. Remove the wheel hub with the brake rotor attached.
  10.  
  11. Perform the rotor inspection procedure.
  12.  

To install:
  1. Coat the hub oil seal lip with multi-purpose grease and install the disc/hub assembly.
  2.  
  3. Adjust the wheel bearing.
  4.  
  5. Using a dial indicator, measure the disc run-out. Check it against the specifications in the Brake Specifications chart and the figures noted earlier.
  6.  

If the wheel bearing nut is improperly tightened, disc run-out will be affected.

  1. Install the remainder of the components as outlined in the appropriate sections.
  2.  
  3. Bleed the brake system.
  4.  
  5. Road test the truck. Double check the wheel bearing preload.
  6.  

INSPECTION



Examine the disc. If it is worn, warped or scored, it must be replaced. Check the thickness of the rotor against the specifications given in the Brake Specifications chart. If below specifications, replace it. Use a micrometer to measure the thickness. Because the allowable wear from new thickness to minimum thickness is only approx. 0.078 in. (2mm), resurfacing the discs is not recommended.

The disc run-out should be measured before the rotor is removed and again, after the rotor is installed. Use a dial indicator mounted on a stand to determine run-out. If run-out exceeds the maximum specification, replace the disc. Maximum runout is as follows:



2WD Pick-Up PD 60 brakes-0.0035 in. (0.09mm)
 
2WD Pick-Up PD 66 brakes-0.0047 in. (0.12mm)
 
2WD Pick-Up FS 17 or 18 brakes-0.0035 in. (0.09mm)
 
4WD 1989-95 Pick-Up and 4Runner-0.0035 in. (0.09mm)
 
T100, Tacoma and 1996 4Runner-0.0028 in. (0.07mm)
 
Land Cruiser-0.0059 in. (0.015mm)
 

Be sure that the wheel bearing nut is properly tightened. If it is not, an inaccurate run-out reading may be obtained. If different run-out readings are obtained with the same disc, between removal and installation, this is probably the cause.

 
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