Lexus ES300 (1997 year). Manual — part 11

43

CHASSIS — AXLES AND BRAKES

AXLES

DESCRIPTION

As in the previous model, a double-row angular ball bearing is used for both the front and rear axles in the
new model.

43

CHASSIS — AXLES AND BRAKES

AXLES

DESCRIPTION

As in the previous model, a double-row angular ball bearing is used for both the front and rear axles in the
new model.

BRAKES

DESCRIPTION

A ventilated disc brakes are used for the front, and a solid disc brakes are used for the rear.

The front brake caliper has been changed from the 2-piston type to the single-piston type.

As on the previous model, all models are provided with ABS as standard equipment. However, the ABS
actuator has been changed to the 2-position solenoid valve type actuator.

The ABS & TRAC system has been newly provided as standard equipment on models for Canada, and
as optional equipment on models for the U.S.A.

A portless and portless type master cylinder is used on the models with ABS & TRAC system.

A pedal type parking broke lever has been adopted.

44

CHASSIS — BRAKES

Specifications

Model

New

Previous

Item

New

Previous

Master

Type

Tandem

←

Cylinder

Diameter

mm (in.)

25.4 (1.00)

←

Brake

Type

Tandem

←

Booster

Size

in.

8.5” + 8.5”

8” + 9”

Type

Ventilated Disc

←

Front

Pad Area

cm

2

(in.

2

)

44 (6.82)

57 (8.84)

Brake

Wheel Cylinder Dia.

mm (in.)

60.33 (2.38)

42.9 (1.69) x 2

Rotor Size (D x T)*

1

mm (in.)

275 x 28 (10.83 x 1.10)

←

Type

Soid Disc

←

Rear

Pad Area

cm

2

(in.

2

)

34 (5.27)

←

Brake

Wheel Cylinder Dia.

mm (in.)

34.9 (1.38)

←

Rotor Size (D x T)*

1

mm (in.)

269 x 10 (10.59 x 0.39)

288 x 10 (11.34 x 0.39)

Brake

Type

Dual–P Valve

←

Brake

Control

Valve

Deflection Point of Hydraulic

Pressure

kPa (kgf/cm

2

, psi)

2942 (30, 427)

←

Valve

Pressure Reduction Gradient

0.6

0.37

Parking

Type

Duo Servo

←

Parking

Brake

Size

mm (in.)

170 (6.69)

←

Brake

Lever Type

Pedal Type

Center Lever Type

ABS

STD

STD

ABS & TRAC System

STD*

2

, OPT*

3

—

*

1

: D: Outer Diameter, T: Thickness,

*

2

: Models for Canada

*

3

: Models for Canada

MASTER CYLINDER

As in the previous model, the portless and
lockheed type master cylinder is used on the
models with ABS.
The portless and portless type master cylinder is
used on the models with ABS & TRAC system.

45

CHASSIS — BRAKES

PARKING BRAKE

1. General

As on the ’97 LS400, a pedal type parking brake has been adopted. However, the new ES300 uses a type
of parking brake pedal that releases the parking brake by pressing the pedal further. Along with this change,
the release lever and the pedal return absorber have been discontinued, resulting in weight reduction.

2. Construction

A pedal type parking brake lever consists of a
parking brake pedal, sector, pawl, pawl spring,
pedal return spring and etc.
The pedal and sector are integrated, and the
parking brake cable is attached to the tip of the
sector.
The sector is provided with a ratchet into which
the pawl meshes.
The pawl and bracket are assembled with a pin.
Also, the pawl has an oblong hole, which can
realize a loss stroke.