LEXUS LS430 2003 Factory Repair Manual

Fig. 83: Measuring Disc Runout 10 Mm Inside (0.39 In.) Outer Edge Of Disc
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17.TEMPORARILY TIGHTEN FRONT DISC BRAKE BLEEDER PLUG
a. Temporarily tighten the front disc brake bleeder plug to the disc brake cylinder assy.
18.INSTALL PISTON SEAL
a. Apply lithium soap base glycol grease to a new piston seal.
b. Install the piston seal to the disc brake cylinder assy.
19.INSTALL FRONT DISC BRAKE PISTON
a. Apply lithium soap base glycol grease to the front disc brake piston and a new cylinder boot.
b. Install the cylinder boot to the front disc brake piston.
c. Install the piston to the front disc brake cylinder assy.
20.INSTALL CYLINDER BOOT

a. Install the cylinder boot to the front disc brake cylinder.
21.INSTALL DISC BRAKE CYLINDER ASSY LH
a. Install the caliper with the 2 new bolts.
Torque: 110 N.m (1,122 kgf.cm, 81 ft.lbf)
Fig. 84: Installing Caliper With Bolts

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22.CONNECT FRONT FLEXIBLE HOSE

a. Connect the flexible hose with the union bolt and a new gasket.
Torque: 39 N.m (400 kgf.cm, 29 ft.lbf)
HINT:
Install the flexible hose lock securely in the lock hole in the disc brake cylinder assy.
Fig. 85: Connecting Flexible Hose With Union Bolt And Gasket

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23.INSTALL DISC BRAKE PAD KIT FRONT (PAD ONLY)
a. Right wheel:
Connect the pad wear indicator to the inner pads, and install a new clip.
HINT:

Install the clip lock securely in the grooves of the pad.
Fig. 86: Connecting Pad Wear Indicator To Inner Pads

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b. Apply disc brake grease to the anti squeal shims and install them to each pad.
c. Install the pad wear indicator to the inner pad.

Fig. 87: Applying Disc Brake Grease To Anti Squeal Shims
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24.INSTALL FRONT DISC BRAKE ANTI-RATTLE SPRING
25.INSTALL FRONT DISC BRAKE W/HOLE PIN
a. Install the hole pin while pushing on the front disc brake anti-rattle spring.
HINT:
Right wheel: Thread the pad wear indicator wire clamp through the hole pin.
b. Install the clip.

Fig. 88: Installing Hole Pin While Pushing On Front Disc Brake Anti-Rattle Spring
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26.FILL RESERVOIR WITH BRAKE FLUID (SEE BLEEDING
)
27.BLEED MASTER CYLINDER (SEE BLEEDING
)
SST 09023-00101
28.BLEED BRAKE LINE (SEE BLEEDING
)
29.BLEED BRAKE ACTUATOR (SEE BLEEDING
)
30.CHECK FLUID LEVEL IN RESERVOIR (SEE BLEEDING
)
31.CHECK BRAKE FLUID LEAKAGE
If fluid leaks, tighten or replace the leaking part.
32.INSTALL FRONT WHEEL
Torque: 103 N.m (1,050 kgf.cm, 76 ft.lbf)
COMPONENTS

Fig. 89: Exploded View Of Rear Brake
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OVERHAUL
HINT:

Overhaul the RH side by using the same procedures as for the LH side.
1.REMOVE REAR WHEEL
2.DRAIN BRAKE FLUID
a. Draw out fluid with syringe.
3.REMOVE REAR DISC BRAKE W/HOLE PIN
a. Remove the clip.
b. Remove the rear disc brake w/hole pin while pushing on the rear disc brake anti-rattle spring.
4.REMOVE REAR DISC BRAKE ANTI-RATTLE SPRING
5.REMOVE DISC BRAKE PAD KIT REAR (PAD ONLY)
a. Remove the 2 pads and the 2 anti-squeal shims from each pad.

Fig. 90: Removing Rear Disc Brake W/Hole Pin While Pushing On Rear Disc Brake Anti-
Rattle Spring
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b. Right wheel:
Remove the clamp, clip and bleeder plug cap, and disconnect the pad wear indicator assembly from the
inner pad.
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6.INSPECT PAD LINING THICKNESS
a. Using a ruler, measure the pad lining thickness.
Standard thickness: 11.0 mm (0.433 in.)

Minimum thickness: 1.0 mm (0.039 in.)
If the pad lining thickness is less than the minimum, replace the pad.
Fig. 92: Measuring Pad Lining Thickness

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7.DISCONNECT REAR LH FLEXIBLE HOSE
a. Remove the union bolt and gasket from the disc brake cylinder assy rear, then disconnect the
flexible hose from the disc brake c
ylinder assy rear.