Lexus RX300 (MCU15). Manual — part 174
BR06Y–05
BR–48
–
BRAKE
REAR BRAKE CALIPER
LEXUS RX300 (RM785E)
INSTALLATION
Installation is in the reverse order of removal (See page BR–44).
HINT:
S
After installation, fill the brake reservoir with brake fluid and bleed brake system (See page BR–4).
S
Check for leaks.
BR06Z–06
F04967
N·m (kgf·cm, ft·lbf) : Specified torque
High temperature grease
z Non–reusable part
Guide Plate
Spring
Shoe Strut
Shim
z C–washer
Pin
Front Shoe
Adjuster
Tension Spring
Shoe Hold–down
Spring
Shoe Hold–down
Spring Cap
Plug
Rear Shoe Pin
Shoe Return
Spring
47 (475, 34)
Rear Disc
Brake
Adjuster
Parking Brake
Lever
–
BRAKE
PARKING BRAKE
BR–49
LEXUS RX300 (RM785E)
PARKING BRAKE
COMPONENTS
BR070–04
F13365
R00309
F04953
F04954
BR–50
–
BRAKE
PARKING BRAKE
LEXUS RX300 (RM785E)
DISASSEMBLY
1.
REMOVE REAR WHEEL
2.
REMOVE REAR DISC BRAKE ASSEMBLY
(a)
Remove the 2 mounting bolts and remove the disc brake
assembly.
Torque: 47 N·m (475 kgf·cm, 34 ft·lbf)
(b)
Suspend the disc brake securely. Ensure that the hose is
not stretched.
3.
REMOVE DISC
HINT:
If the disc cannot be removed easily, turn the shoe adjuster until
the wheel turns freely.
4.
REMOVE SHOE RETURN SPRINGS
Using needle–nose pliers, remove the 2 shoe return springs.
5.
REMOVE FRONT SHOE
(a)
Slide out the front shoe and remove the adjuster.
(b)
Remove the shoe strut with the spring.
(c)
Remove the shoe hold–down spring caps, spring and pin.
(d)
Disconnect the tension spring and remove the front shoe.
6.
REMOVE REAR SHOE
(a)
Slide out the rear shoe.
(b)
Remove the tension spring from the rear shoe.
(c)
Remove the shoe hold–down spring caps, spring and pin.
(d)
Using needle–nose pliers, disconnect the parking brake
cable from the parking brake shoe lever.
BR071–05
BR5332
F06409
BR0828
R00343
Shim
Clearance
R00313
–
BRAKE
PARKING BRAKE
BR–51
LEXUS RX300 (RM785E)
INSPECTION
1.
INSPECT DISASSEMBLED PARTS
Inspect the disassembled parts for wear, rust or damage.
2.
MEASURE BRAKE SHOE LINING THICKNESS
Using a ruler, measure the thickness of the shoe lining.
Standard thickness: 2.0 mm (0.079 in.)
Minimum thickness: 1.0 mm (0.039 in.)
If the lining thickness is at the minimum thickness or less, or if
there is severe, uneven wear, replace the brake shoe.
3.
MEASURE DISC INSIDE DIAMETER
Using brake drum gauge or equivalent, measure the inside di-
ameter of the disc.
Standard inside diameter: 170 mm (6.69 in.)
Maximum inside diameter: 171 mm (6.73 in.)
Replace the disc if the inside diameter is at the maximum value
or more. Replace the disc or grind it with a lathe if the disc is
scored or is worn unevenly.
4.
INSPECT PARKING BRAKE LINING AND DISC FOR
PROPER CONTACT
Apply chalk to the inside surface of the disc, then grind down
the brake shoe lining to fit. If the contact between the disc and
the brake shoe lining is improper, repair it using a brake shoe
grinder or replace the brake shoe assembly.
5.
MEASURE CLEARANCE BETWEEN PARKING
BRAKE SHOE AND LEVER
Using a feeler gauge, measure the clearance.
Standard clearance: Less than 0.35 mm (0.0138 in.)
If the clearance is not within the specification, replace the shim
with one of the correct size.
Shim Thickness
Shim Thickness
0.3 mm (0.012 in.)
0.9 mm (0.035 in.)
0.6 mm (0.024 in.)
–
6.
IF NECESSARY, REPLACE SHIM
(a)
Using a screwdriver, remove the C–washer and shim.
(b)
Install the correct size shim.
(c)
Using needle–nose pliers, install the parking brake lever
with a new C–washer.
(d)
Remeasure the clearance.
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