torque LEXUS GS400 2000 Service Workshop Manual

W00744
± BRAKEFRONT BRAKE PAD
BR±17
2125 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
10. INSTALL CALIPER
(a) Draw out a small amount of brake fluid from the reservoir.
(b) Press in the pistons with a hammer handle or similar im-
plement.
HINT:
If the pistons are difficult to push in, loosen the bleeder plug and
push in the pistons while letting some brake fluid escape.
(c) Install the caliper.
(d) Hold the sliding pin and torque the installation bolt.
Torque: 34 N´m (350 kgf´cm, 25 ft´lbf)
11. INSTALL FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
12. DEPRESS BRAKE PEDAL SEVERAL TIMES
13. CHECK THAT FLUID LEVEL IS AT MAX LINE

BR0JJ±07
F01623
11 (110, 8)
34 (350, 25)
Bleeder Plug

Gasket
Brake Caliper
Anti±squeal ShimPad Support Plate
Inner Pad
Inner Anti±squeal
ShimOuter PadAnti±squeal Spring
Boot
Piston Seal
PistonSet RingSliding Bushing Pad Support Plate
Sliding Pin

Dust Boot
Torque Plate
Disc
N´m (kgf´cm, ft´lbf): Specified torque
Lithium soap base glycol grease
Disc brake grease Non±reusable part


30 (310, 22)
118 (1,200, 87)
BR±18
± BRAKEFRONT BRAKE CALIPER
2126 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FRONT BRAKE CALIPER
COMPONENTS

BR0JK±03
F01624
± BRAKEFRONT BRAKE CALIPER
BR±19
2127 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DISCONNECT FLEXIBLE HOSE
Remove the union bolt and 2 gaskets from the caliper, then dis-
connect the flexible hose from the caliper. Use a container to
catch brake fluid as it drains out.
Torque: 30 N´m (310 kgf´cm, 22 ft´lbf)
HINT:
At the time of installation, install the flexible hose lock securely
in the lock hole in the caliper.
2. REMOVE CALIPER
(a) Hold the sliding pin and loosen the 2 installation bolts.
Torque: 34 N´m (350 kgf´cm, 25 ft´lbf)
(b) Remove the 2 installation bolts.
(c) Remove the caliper from the torque plate.
3. REMOVE 2 ANTI±SQUEAL SPRINGS
4. REMOVE 2 BRAKE PADS WITH 4 ANTI±SQUEAL
SHIMS
5. REMOVE 4 PAD SUPPORT PLATES

BR0JM±07
F01627
F01630
F01631
± BRAKEFRONT BRAKE CALIPER
BR±21
2129 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. MEASURE PAD LINING THICKNESS
Using a ruler, measure the pad lining thickness.
Standard thickness: 11.0 mm (0.433 in.)
Minimum thickness: 1.0 mm (0.039 in.)
Replace the pad if the thickness is less than the minimum (the
1.0 mm slit is no longer visible), or if it shows signs of uneven
wear.
2. MEASURE DISC THICKNESS
Using a micrometer, measure the disc thickness.
Standard thickness: 32.0 mm (1.260 in.)
Minimum thickness: 30.0 mm (1.181 in.)
Replace the disc if the thickness of the disc is at the minimum
thickness or less. Replace the disc or grind it on a lathe if it is
scored or is worn unevenly.
3. MEASURE DISC RUNOUT
(a) Temporarily fasten the disc with the 3 hub nuts.
(b) Using a dial indicator, measure the disc runout at a posi-
tion 10 mm (0.39 in.) away from the out side edge.
Maximum disc runout: 0.05 mm (0.0020 in.)
If the disc's runout is maximum value or greater, check the bear-
ing play in the axial direction and check the axle hub runout
(See page SA±10). If the bearing play and axle hub runout are
not abnormal, adjust the disc runout or grind it on a ºOn±Carº
brake lathe.
4. IF NECESSARY, ADJUST DISC RUNOUT
(a) Remove the 2 bolts and torque plate.
(b) Remove the 3 hub nuts and disc. Turn the disc 1/5 turn
and reinstall the disc. Install and torque the 3 hub nuts.
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
(c) Remeasure the disc runout. Make a note of the runout
and the disc's position on the hub.
(d) Repeat (b) until the disc has been installed on the 3 re-
maining hub positions.
(e) If the minimum runout recorded in (b) and (c) is less than
0.05 mm (0.0020 in.), install the disc in that position.
(f) If the minimum runout recorded in (b) and (c) is greater
than 0.05 mm (0.0020 in.), replace the disc and repeat
step 3.
(g) Install the torque plate and torque the 2 bolts.
Torque: 118 N´m (1,200 kgf´cm, 87 ft´lbf)

F01635
Direction of disc rotation for
forward movement
F01636
F07232
AB
Claw
BR±26
± BRAKEREAR BRAKE PAD
2134 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Install the 2 anti±squeal shims on each pad.
HINT:
Make sure the arrows on the inner anti±squeal shims facing to
the direction of disc rotation as shown in the illustration.
(c) Draw out a small amount of brake fluid from the reservoir.
(d) Press in the pistons with a monkey wrench handle or
equivalent.
HINT:

Tape the monkey wrench handle before use.

If the piston is difficult to push in, loosen the bleeder plug
and push in the piston while letting some brake fluid es-
cape.
(e) Install the 2 pads.
7. I N S TA L L PA D G U I D E P I N A N D A N T I ± S Q U E A L
SPRING
(a) Install the pad guide pin and clip.
(b) Install the anti±squeal spring.
HINT:

Ensure that the claw of the anti±squeal spring is raised up
on the caliper securely.

Ensure that there is no gap between the pad guide pin
and anti±squeal spring.

Ensure that ºAº and ºBº portions of anti±squeal spring are
attached to the pad.
8. INSTALL FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
9. DEPRESS BRAKE PEDAL SEVERAL TIMES
10. CHECK THAT FLUID LEVEL IS AT MAX LINE

BR0JR±07
F06932

Gasket Piston
Piston Seal
Brake DiscPad Guide Pin Cylinder Boot Inner Anti±squeal Shim
Non±reusable part
Lithium soap base glycol grease
Disc brake grease
: Specified torque


30 (310, 22)
Set RingAnti±squeal Shim Anti±squeal Spring Anti±squeal Shim
Brake Caliper
Inner Anti±squeal ShimOuter Pad Inner Pad
104 (1,065, 77)
Clip
N´m (kgf´cm, ft´lbf)
± BRAKEREAR BRAKE CALIPER
BR±27
2135 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REAR BRAKE CALIPER
COMPONENTS

BR0JS±06
F01639
BR±28
± BRAKEREAR BRAKE CALIPER
2136 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE REAR WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. DISCONNECT FLEXIBLE HOSE
Remove the union bolt and gasket from the caliper, then discon-
nect the flexible hose from the caliper. Use a container to catch
brake fluid as it drains out.
Torque: 30 N´m (310 kgf´cm, 22 ft´lbf)
HINT:
At the time of installation, please refer to the following item.
Install the flexible hose lock securely in the lock hole in the cali-
per.
3. REMOVE CALIPER
(a) Remove the 2 installation bolts.
Torque: 104 N´m (1,065 kgf´cm, 77 ft´lbf)
(b) Remove the caliper.
4. REMOVE BRAKE PADS (See page BR±25)
(a) Remove the anti±squeal spring.
(b) Remove the clip and pad guide pin.
(c) Remove the 2 pads with the 4 anti±squeal shims.

BR0JU±07
F01643
F01644
F01645
BR±30
± BRAKEREAR BRAKE CALIPER
2138 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. MEASURE PAD LINING THICKNESS
Using a ruler, measure the pad lining thickness.
Standard thickness: 10.5 mm (0.413 in.)
Minimum thickness: 1.0 mm (0.039 in.)
Replace the pads if the thickness is less than the minimum or
if it shows signs of uneven wear.
2. MEASURE DISC THICKNESS
Using a micrometer, measure the disc thickness.
Standard thickness: 12.0 mm (0.472 in.)
Minimum thickness: 10.5 mm (0.413 in.)
Replace the disc if the thickness of the disc is at the minimum
thickness or less. Replace the disc or grind it on a lathe if it is
badly scored or worn unevenly.
3. MEASURE DISC RUNOUT
Using a dial indicator, measure the disc runout at a position 10
mm (0.394 in.) away from the out side edge.
Maximum disc runout: 0.05 mm (0.0020 in.)
If the disc's runout is maximum value or greater, check the bear-
ing play in the axial direction and check the axle hub runout
(See page SA±44). If the bearing play and axle hub runout are
not abnormal, adjust the disc runout or grind it on a ºOn±Carº
brake lathe.
4. IF NECESSARY, ADJUST DISC RUNOUT
(a) Remove the 3 hub nuts and disc. Turn the disc 1/5 and
reinstall the disc. Install and torque the 3 hub nuts.
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
(b) Remeasure the disc runout. Make a note of the runout
and the disc's position on the hub.
(c) Repeat (b) until the disc has been installed on the 3 re-
maining hub positions.
(d) If the minimum runout recorded in (b) and (c) is less than
0.05 mm (0.0020 in.), install the disc in that position.
(e) If the minimum runout recorded in (b) and (c) is greater
than 0.05 mm (0.0020 in.), replace the disc and repeat
step 3.

BR0JX±06
F04516
Pin
18 (185, 13)
Shoe Return Spring
104 (1,065, 77)
Rear Disc Brake
Assembly
Front Shoe

C±washer
Shim
Parking Brake shoe
Lever
Rear Shoe
Shoe Strut
SpringShoe Hold±down Spring
(Color: Pink)
Adjuster
Cup
Tension Spring
Shoe Hold±down Spring
(Color: Blue)
DiscPlug
High temperature grease
N´m (kgf´cm, ft´lbf) : Specified torque
± BRAKEPARKING BRAKE
BR±33
2141 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PARKING BRAKE
COMPONENTS

BR0JY±03
F01647
F01648
F01649
F01650
F01651
BR±34
± BRAKEPARKING BRAKE
2142 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE REAR WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE REAR DISC BRAKE ASSEMBLY
(a) Remove the 2 mounting bolts and remove the disc brake
assembly.
Torque: 104 N´m (1,065 kgf´cm, 77 ft´lbf)
(b) Suspend the disc brake securely and so the hose is not
stretched.
3. REMOVE DISC
(a) Release the parking brake pedal.
(b) Place matchmarks on the disc and rear axle hub.
(c) Remove the disc.
HINT:

If the disc cannot be removed easily, turn the shoe adjust-
er until the wheel turns freely.

If there are no matchmarks, temporarily install the disc,
then measure the disc runout and install the disc in posi-
tion (See page BR±30).
4. REMOVE SHOE RETURN SPRINGS
Using needle±nose pliers, remove the 2 shoe return springs.
5. REMOVE SHOE STRUT WITH SPRING
HINT:
At the time of reassembly, install the strut with the spring facing
forward.
6. REMOVE FRONT SHOE AND ADJUSTER
(a) Slide out the front shoe and remove the shoe adjuster.
(b) Disconnect the tension spring and remove the front shoe.
(c) Remove the 2 cups, shoe hold±down spring and pin.
7. REMOVE REAR SHOE AND TENSION SPRING
(a) Slide out the rear shoe.
(b) Remove the tension spring from the rear shoe.
(c) Disconnect the parking brake cable from the parking
brake shoe lever.
(d) Remove the 2 cups, shoe hold±down spring and pin.