LEXUS SC400 1991 Service Repair Manual

3. INSPECT FLEXIBLE COUPLING CENTERING BUSHINGwCheck for damage to the bushing.
If the bushing is damaged, replace the propeller shaft assem-
bly.
CENTER SUPPORT BEARING
REPLACEMENT
PR04K±01
1. SEPARATE INTERMEDIATE SHAFT AND PROPELLER SHAFT
(a) Place matchmarks on the intermediate shaft and propeller shaft.
(b) Separate the intermediate shaft and propeller shaft.
(c) Remove the dust boot from the propeller shaft.
HINT: If the dust boot is reused, remove it after wrapping vinyl
tape around the spline, so it will not be damaged.
2. REMOVE CENTER SUPPORT BEARING
(a) Using a snap ring expander, remove the snap ring.
(b) Using SST, remove the center bearing and dust deflector. SST 09950±20017
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PROPELLER SHAFT PROPELLER SHAFTPR±9
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3. INSPECT RUNOUT OF INTERMEDIATE SHAFT ANDPROPELLER SHAFT
Maximum runout:
0.8 mm (0.031 in.)
If the runout is greater than the maximum, replace the propel-
ler shaft assembly.
4. INSPECT SPIDER BEARING wCheck if the spider bearing rotates smoothly.
w Check if there is any play in the spider bearing.
If necessary, replace the propeller shaft assembly.
5. INSTALL CENTER SUPPORT BEARING
(a) Using SST and a press, install the center support bearing. SST 09330±50010
(b) Using SST and a press, insert a new dust deflector until it almost the rubber of the center support bearing.
SST 09608±12010 (09608±00070),
09608±35014 (09608±06040)
(c) Using SST and a press, install a new dust deflector till end. SST 09330±50010
PR±10
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PROPELLER SHAFT PROPELLER SHAFT
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(d) Using a snap ring expander, install the new snap ring.
6. ASSEMBLE INTERMEDIATE SHAFT AND PROPELLERSHAFT
(a) Install the dust boot.
NOTICE: Assemble after wrapping vinyl tape around the
spline so it will not damage the boot.
(b) Apply grease to the spline.
Grease:
Molybdenum disulphide lithium base, NLGI No.2.
(c) Align the matchmarks and assemble the intermediate shaftand propeller shaft.
(d) Cover the adjusting nut with the dust boot.
NOTICE: The directions of the intermediate shaft com-
panion flange and the propeller shaft companion flange
should differ by 180 5.
(e) Tighten the adjusting nut fully by hand.
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PROPELLER SHAFT PROPELLER SHAFTPR±11
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PROPELLER SHAFT INSTALLATION
PR04L±01
1. INSTALL PROPELLER SHAFT
(a) Apply grease to the flexible coupling centering bushings.
Grease:Molybdenum disulphide lithium base, NLGI No.1 or
No.2.
(b) Insert the propeller shaft from the vehicle's rear and connectthe transmission and differential.
NOTICE: Support the center support bearing by hand so
that the transmission and intermediate shaft, and propel-
ler shaft and differential, remain in a straight line.
(c) Temporarily install the center support bearing set bolts with the adjusting washers.
HINT: Use the adjusting washers which were removed.
(d) Align the matchmarks and connect the propeller shaft to the transmission.
(e) Install the 3 bolts, washers and nuts.
NOTICE: Bolts should be inserted from the propeller
shaft side.
Torque: 79 N Vm (805 kgf Vcm, 58 ft Vlbf)
(g) Align the matchmarks and install the propeller shaft on the
differential with the 3 bolts, washers and nuts.
NOTICE: Bolts should be inserted from the propeller
shaft side.
Torque: 79 N Vm (805 kgf Vcm, 58 ft Vlbf)
PR±12±
PROPELLER SHAFT PROPELLER SHAFT
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If using a new propeller shaft w / Phasemarks:
Install the propeller shaft phasemarks and differential phase-
marks so that their respective alignment phasemarks match.
If the propeller shaft phasemarks and differential phase-
marks do not align, install the propeller shaft and differential
alignment phasemarks are as close together as possible.
w / o Phasemarks:
Install the propeller shaft.
(See page PR±12)
(h) Torque the center support bearing set bolts.
Torque: 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
HINT: Adjust the center support bearing to keep the dimen-
sion within the limits, as shown.
Under the same condition, check if the center line of the cen-
ter support bearing is at right angles to the shaft axial direc-
tion.
(i) Using SST, tighten the adjusting nut. SST 09922±10010
Torque: 48 N Vm (490 kgf Vcm, 35 ft Vlbf)
HINT: Use a torque wrench with a fulcrum length of 350 mm
(13.8 in.).
2. INSPECT JOINT ANGLE (See page PR±15)
NOTICE: The joint angle should by all means be checked
when the propeller shaft is removed and installed.
3. INSTALL CROSSMEMBER BRACE Install the center floor crossmember brace and torque the 4
bolts.
Torque: 13 N Vm (130 kgf Vcm, 8 ft Vlbf)
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PROPELLER SHAFT PROPELLER SHAFTPR±13
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4. INSTALL HEAT INSULATORInstall the heat insulator and torque the 4 nuts.
Torque: 5.4 N Vm (55 kgf Vcm, 48 in. Vlbf)
5. INSTALL EXHAUST CENTER PIPE
(a) Install new gaskets.
(b) Install the exhaust center pipe.
(c) Install the exhaust center pipe to the 2 rings.
(d) Install and torque the new 4 nuts.
Torque: 19 N Vm (195 kgf Vcm, 14 ft Vlbf)
6. INSTALL EXHAUST FRONT PIPE
(a) Install new gaskets.
(b) Install the front pipe.
(c) Install and torque the 6 bolts and new nuts.
Torque: 43 N Vm (440 kgf Vcm, 32 ft Vlbf)
(d) Connect both oxygen sensors.
HINT: When connecting the oxygen sensor, turn it to the left
about 3 times.
NOTICE: After installing the oxygen sensor, check that
the wire is not twisted.
(e) Tighten the oxygen sensors.
Torque: 44 N Vm (450 kgf Vcm, 33 ft Vlbf)
(f) Connect the oxygen sensor grommets to the floor.
PR±14
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PROPELLER SHAFT PROPELLER SHAFT
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JOINT ANGLE INSPECTION AND
ADJUSTMENT
PR02U±08
NOTICE: When performing operations which involve the
removal and installation of the propeller shaft, always
check the joint. Make adjustments if necessary.
1. STABILIZE PROPELLER SHAFT AND DIFFERENTIAL
(a) Turn the propeller shaft several times by hand to stabilize the center support bearing and flexible couplings.
(b) Using a jack, raise and lower the differential to stabilize the differential mounting cushion.
2. CHECK JOINT ANGLE OF NO.2 JOINT AND NO.3 JOINT
(a) Using SST, measure the installation angle of the intermediate
shaft and propeller shaft.
SST 09370±50010
HINT: The SST should be directly underneath the tube.
(b) Using SST, measure the installation angle of the differential. SST 09370±50010
HINT: Measure the installation angle by placing the SST in
the position, as shown in the illustration.
(c) Calculate the No.2 joint angle.
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PROPELLER SHAFT PROPELLER SHAFTPR±15
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No.2 joint angle:A±B = ±1 05 ' + 36 '
A: Intermediate shaft installation angle
B: Propeller shaft installation angle
(d) Calculate the No.3 joint angle.
No.3 joint angle:
B±C = 1 001 ' + 36 '
B: Propeller shaft installation angle
C: Differential installation angle
If the measure angle is not within the specification, adjust it
with the center support bearing adjusting washer, differential
mount upper stopper and adjusting shim.
  Thickness mm (in.)\
 \
Remarks
 






Center support
bearing
 






Adjusting
washer
 






2.0 (0.079)
4.0 (0.157)
6.0 (0.236)
8.5 (0.335)\
 
\


\


\

\



Left and right washers should be the same thickness

2 washers should not be assembled together.

Standard parts are used 6.0 mm (0.236 in.) washers.
  Set bolt 40.0 (1.575)\
 \

 


 


Mount upper
stopper 


2.3 (0.091)
2.8 (0.110)\
 
\

\



When the vehicle is new a 2.8 mm (0.110 in.)
stopper used in assembly
 


Differential 

Adjusting shim
 


1.0 (0.039)
1.6 (0.063)
2.0 (0.079)\
 
\

\



Left and right washers should be the same thickness

This shim is installed on top of the mount upper
stopper and is used for adjustment.
PR±16±
PROPELLER SHAFT PROPELLER SHAFT
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ADJUSTMENT CHART
PR02V±04
HOW TO READ THIS CHART
Take measurements, then calculate the No.2 and No. 3 joint
angle.
Mark the calculated values on the chart and read the coordi-
nates.
Replace the adjusting washer, shim and mount upper stop-
per in accordance with the coordinates read and adjust the
joint angles.
Example
Measurements (Installation angle):Intermediate shaft 1  10 '
Propeller shaft 2  45 '
Differential 1  01 '
Joint angle: No.2 1  10 '± 2  46 ' = 1  35 '
No.3 2  45 ' ± 1  44 ' = 1  01 '
Adjustment:
Center support bearing Standard parts 6.5 mm (0.256 in.) + 2.5 mm (0.118 in.) =
8.5 mm (0.138 in.)
Use adjusting washers which are 8.5 mm (0.335 in.)
thicker.
Differential
Use adjusting shims which are 1.0 mm (0.039 in.)
thicker.
HINT:
wMaintain the same thickness for the adjusting washers
and adjusting shims on both the left and right sides.
w If a washer, stopper and shim of the exact thickness are
not available, use the parts which are nearest in
thickness.
NOTICE: Check the joint angle once again after making
the adjustment.
±
PROPELLER SHAFT PROPELLER SHAFTPR±17
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PR±18±
PROPELLER SHAFT PROPELLER SHAFT
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