Lexus RX300 (MCU15). Service manual — part 52
CH
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CHASSIS — SUSPENSION AND AXLES
81
3) Rebound Spring
In the front shock absorber with a built in rebound spring, the function of the rebound spring that is
provided in the shock absorber case combines with the function of the coil spring in order to restrain
the elongation of the entire suspension during rebounds. Consequently, only the function of the coil
spring is applied when the suspension stroke is small during normal driving, in order to realize a soft
and comfortable ride. However, when the inner wheel makes large rebounds, such as when the vehicle
is cornering, the functions of both the rebound spring and the coil spring are combined in order to reduce
the elongation of the entire suspension. As a result, the vehicle’s excellent maneuverability and stability
have been realized.
Standard
Length
Rebound
Spring
Free Length
Beginning Stroke
of Rebound Spring
Rebound
Stopper
Rebound
Spring
Stopper Plate
Collapsed Height of
Rebound Spring
Fullstroke
State
Rebound
Spring
Rebound
Coil Spring
Entire Suspension
Characteristics of shock absorber
with built-in rebound spring
185CH16
Load
Bound
Stroke
Beginning Stroke
of Rebound Spring
185CH17
Without Rebound Spring
With Rebound Spring
187CH10
CHASSIS — SUSPENSION AND AXLES
82
3. Rear Suspension
D MacPherson strut suspension is used.
D Rear suspension realizes excellent stability and controllability by optimizing the suspension geometry
and camber change.
187CH11
JAXLES
A double – row angular ball bearing is used for both the front and rear axles.
187CH12
Front Axle
187CH13
Rear Axle
Double – Row
Angular Ball
Bearing
Double – Row
Angular Ball
Bearing
CH
BO
CHASSIS — BRAKES
83
BRAKES
JDESCRIPTION
D The ventilated disc brakes is used for front brakes and the solid disc brakes is used for rear brakes.
D The ABS with EBD & Brake Assist & TRC & VSC system is provided as standard equipment.
ABS (Anti-lock Brake System), EBD (Electronic Brake force Distribution), TRC (Traction Control),
VSC (Vehicle Stability Control)
187CH14
"
Specifications
A
Master Cylinder
Type
Tandem
Master Cylinder
Diameter
mm (in.)
25.4 (1.0)
Brake Booster
Type
Tandem
Brake Booster
Size
in.
8.5” + 8.5’’
Type
Ventilated Disc
Front Brake
Caliper Type
AX60
Front Brake
Wheel Cylinder Dia.
mm (in.)
60.33 (2.38)
Rotor Size (D
× T)*
mm (in.)
296
× 28 (11.65 × 1.1)
Type
Solid Disc
Rear Brake
Caliper Type
PD40R
Rear Brake
Wheel Cylinder Dia.
mm (in.)
40.45 (1.59)
Rotor Size (D
× T)*
mm (in.)
288
× 10 (11.33 × 0.39)
Type
Drum
Parking Brake
Size
mm (in.)
170 (6.69)
g
Lever Type
Pedal
ABS with EBD & Brake Assist & TRC & VSC
STD
*: D: Outer Diameter, T: Thickness
CHASSIS — BRAKES
84
JMASTER CYLINDER AND BRAKE BOOSTER
D A type of brake booster into which the master cylinder is inserted has been adopted to achieve a compact
configuration.
D A long-type 8.5-inch tandem brake booster that matches the stroke of the master cylinder has been adopted
to achieve an optimal braking force.
187CH15
187CH16
LHD Model
RHD Model
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