LEXUS LS430 2003 Factory Repair Manual

Fig. 93: Removing Union Bolt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.REMOVE DISC BRAKE CYLINDER ASSY REAR LH
a. Remove the 2 bolts and the disc brake c
ylinder assy rear from the knuckle.

Fig. 94: Removing Bolts And Disc Brake Cylinder Assy Rear From Knuckle
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
9.REMOVE CYLINDER BOOT
a. Usin
g a screwdriver, remove the cylinder boot from the disc brake cylinder assy rear.

Fig. 95: Removing Cylinder Boot From Disc Brake Cylinder Assy Rear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
10.REMOVE REAR DISC BRAKE PISTON
a. Prepare a wooden plate to hold the pistons.

Fig. 96: Preparing Wooden Plate To Hold Pistons
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Place the plate between the pistons and insert a pad into one side.
c. Use compressed air to remove the pistons alternately from the disc brake cylinder assy rear.

Fig. 97: Removing Pistons Alternately From Disc Brake Cylinder Assy Rear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
11.REMOVE PISTON SEAL
a. Using a screwdriver, remove the 2 piston seals from the disc brake cylinder assy rear.

Fig. 98: Removing Piston Seals From Disc Brake Cylinder Assy Rear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.REMOVE REAR DISC BRAKE BLEEDER PLUG
a. Remove the rear disc brake bleeder plug from the disc brake cylinder assy rear.
13.INSPECT DISC THICKNESS
a. Using a micrometer, measure the disc thickness.
Standard thickness: 16.0 mm (0.630 in.)
Minimum thickness: 14.5 mm (0.571 in.)
If the disc thickness is less than the minimum, replace the disc.

Fig. 99: Measuring Disc Thickness
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
14.REMOVE PARKING BRAKE SHOE ADJUSTING HOLE PLUG
a. Remove the parking brake shoe adjusting hole plug from the rear disc.
15.REMOVE REAR DISC
a. Put matchmarks on the rear disc and the axle hub.

Fig. 100: Identifying Matchmarks On Rear Disc And Axle Hub
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Release the parking brake, and remove the rear disc.
HINT:
If the disc cannot be removed easil
y, turn the shoe adjuster until the wheel turns freely.

Fig. 101: Turning Shoe Adjuster
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
16.INSTALL REAR DISC
a. Aligning the matchmarks, install the rear disc.
HINT:
When replacing the rear disc with a new one, select the installation position where the rear disc has the
minimum runout.
17.INSTALL PARKING BRAKE SHOE ADJUSTING HOLE PLUG
a. Install the parking brake shoe adjusting hole plug to the rear disc.
18.INSPECT DISC RUNOUT
a. Tighten the disc with the 3 hub nuts.
HINT:
Use SST 09330-00021 to hold the disc during measurement.
Torque: 103 N.m (1,050 kgf.cm, 76 ft.lbf)

Fig. 102: Tightening Disc With Hub Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Using a dial indicator, measure the disc runout 10 mm inside (0.39 in.) the outer edge of the disc.
Maximum disc runout: 0.05 mm (0.0020 in.)
c. If the runout exceeds the maximum value, change the installation positions of the disc and axle so
that the runout will become minimal. If the runout exceeds the maximum even when the installation
positions are changed, check the bearing play in the axial direction and the axle hub runout (see
ON
-VEHICLE INSPECTION ). If the bearing play and the axle hub runout are normal and if the
disc thickness is not within the specified range, shave the disc. If the disc thickness is less than the
minimum, replace the disc.