Lexus SC300 / Lexus SC400. Service manual — part 954
SUSPENSION BALL JOINT INSPECTION – PG012-02
October 11, 2002
Page 2 of 5
MODEL
LOCATION
LOWER BALL JOINT OR SUSPENSION
BALL JOINT
UPPER BALL JOINT
MODEL
LOCATION
INSP.
METHOD
MAX. PLAY
TURNING
TORQUE
INSP.
METHOD
MAX. PLAY
TURNING
TORQUE
LS 400
(UCF10)
Front
1–(A)
0.016 in.
(0.4) mm
4 in.
S
lbf
(0.5 N
S
m)
or Less
(UCF10)
1990–1994
Rear
3
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
LS 400
(UCF20)
Front
1–(A)
0.016 in.
(0.4) mm
22 in.
S
lbf
(2.5 N
S
m)
or Less
(UCF20)
1995–2000
Rear
3
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
LS 430
(UCF30)
Front
1–(A)
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
(UCF30)
2001–2003
Rear
3
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
GS 300
(JZS147)
Front
1–(A)
0.016 in.
(0.4) mm
27 in.
S
lbf
(3.0 N
S
m)
or Less
2
No Play
31 in.
S
lbf
(3 5 N
S
m)
(JZS147)
1993–1997
Rear
1–(A)
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
2
No Play
Felt
(3.5 N
S
m)
or Less
GS 300, 400,
430
(JZS16#
Front
1–(A)
0.016 in.
(0.4) mm
27 in.
S
lbf
(3.0 N
S
m)
or Less
(JZS16#,
UZS16#)
1998–2003
Rear
3
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
SC 300, 400
(JZZ31,
Front
1–(A)
0.016 in.
(0.4) mm
27 in.
S
lbf
(3.0 N
S
m)
or Less
(JZZ31,
UZZ30)
1992–2000
Rear
1–(A)
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
SC 430
(UZZ40)
Front
1–(A)
0.016 in.
(0.4) mm
27 in.
S
lbf
(3.0 N
S
m)
or Less
(UZZ40)
2002–2003
Rear
3
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
Inspection
Information
Table
SUSPENSION BALL JOINT INSPECTION – PG012-02
October 11, 2002
Page 3 of 5
MODEL
LOCATION
LOWER BALL JOINT OR SUSPENSION
BALL JOINT
UPPER BALL JOINT
MODEL
LOCATION
INSP.
METHOD
MAX. PLAY
TURNING
TORQUE
INSP.
METHOD
MAX. PLAY
TURNING
TORQUE
IS 300
(JCE10)
Front
1–(A)
0.016 in.
(0.4) mm
27 in.
S
lbf
(3.0 N
S
m)
or Less
2
No Play
31 in.
S
lbf
(3.5 N
S
m)
or Less
(JCE10)
2001–2003
Rear
3
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
2
No Play
Felt
27 in.
S
lbf
(3.0 N
S
m)
or Less
RX 300
(MCU10, 15)
1999 2003
Front
1–(B)
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
N/A
N/A
N/A
1999–2003
Rear
N/A
N/A
N/A
N/A
N/A
N/A
ES 250 & 300
(VZV21,
MCV20, 30)
Front
1–(B)
No Play
Felt
31 in.
S
lbf
(3.5 N
S
m)
or Less
N/A
N/A
N/A
MCV20, 30)
1990–2003
Rear
N/A
N/A
N/A
N/A
N/A
N/A
LX 470
(UZJ100)
1998 2003
Front
1–(A)
No Play
Felt
27 in.
S
lbf
(3.0 N
S
m)
or Less
2
No Play
Felt
40 in.
S
lbf
(4.5 N
S
m)
or Less
1998–2003
Rear
N/A
N/A
N/A
N/A
N/A
N/A
NOTE:
S
Be sure to check the table for the
applicable inspection type based on
the vehicle model.
S
Refer to the table for the standard
free play values.
1. Inspect Lower Ball Joint Free Play
A. Move the hub up and down by
hand (Most models with
wish–bone suspension):
a. Remove the tire.
b. Install the 2 lug nuts.
c. Inspect the free play while
moving the lug nuts up and
down at a force of 67 lbf
(294 N, 30 kgf).
Inspection
Information
Table
(Continued)
Free Play
Inspection
SUSPENSION BALL JOINT INSPECTION – PG012-02
October 11, 2002
Page 4 of 5
B. Move the lower arm by hand (All
models with strut type suspension
and some models with wish–bone
type suspension):
a. Lift up the vehicle.
b. Inspect the free play while
moving the lower arm up and
down at a force of 67 lbf
(294 N, 30 kgf).
2. Inspect Upper Ball Joint Play
Move the upper arm by hand (Models
where the LOWER control arm are
linked by a torsion bar, and all models
using a coil spring.
A. Remove the front tire.
B. Inspect the free play while moving
the upper arm up and down at a
force of 67 lbf (294 N, 30 kgf).
3. Inspect the Suspension Arm Ball
Joint Free Play
A. Lift up the vehicle.
B. Inspect the free play while moving
the control arm by hand.
(Reference)
Free Play Inspection Method
(Gauge Installation)
S
Position the dial gauge between the
arm (upper or lower) and the knuckle,
and measure free play.
(This illustration shows how to
measure free play for vehicles with
double wishbone type suspension
with coil spring).
Inspect Ball Joint Dust Cover
Check for cracks and grease leaks on the
dust cover (boots).
Free Play
Inspection
(Continued)
SUSPENSION BALL JOINT INSPECTION – PG012-02
October 11, 2002
Page 5 of 5
Inspect Ball Joint Turning Torque
Move the stud back and forth 5 times,
then turn the stud continuously at 3–5
seconds per turn, and measure the
turning torque at the 5th turn.
HINT:
Refer to the table for standard values
for the turning torque.
Turning
Torque
Inspection
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