ect LEXUS SC300 1991 Service Repair Manual

PROPELLER SHAFT REMOVAL
PR02Q±06
1. REMOVE EXHAUST FRONT PIPE
(a) Disconnect the oxygen sensor grommets from the floor.
(b) Disconnect the oxygen sensors from the exhaust front pipe.
(c) Remove the 6 nuts, bolts and exhaust center pipe.
2. REMOVE EXHAUST CENTER PIPEHINT: To prevent interference, of the tail pipes must be sus-
pended from the stabilizer bar.
(a) Disconnect the exhaust center pipe from the 2 rings.
(b) Remove the 4 nuts.
(c) Remove the exhaust center pipe.
3. REMOVE HEAT INSULATOR Remove the 4 nuts and the heat insulator.
4. REMOVE CROSSMEMBER BRACE Remove the 4 bolts and the center floor crossmember brace.
PR±6
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5. REMOVE PROPELLER SHAFT
(a) Using SST, loosen the adjusting nut until it can be turned byhand.
SST 09922±10010
HINT: Use 2 of the same type of SST.
(b) Place matchmarks on the transmission companion flange and flexible coupling.
(c) Remove the 3 bolts inserted in the transmission companion
flange.
NOTICE: The bolts inserted in the propeller shaft flange
should not be removed.
(d) Place matchmarks on the differential companion flange and flexible coupling.
(e) Remove the 3 bolts inserted in the differential companion
flange.
NOTICE: The bolts inserted in the propeller shaft com-
panion flange should not be removed.
(f) Separate the flexible couplings from the transmission side and differential side.
HINT: If the flexible coupling can not be easily separated by
hand, insert a screwdriver into the bolt hole of the flexible cou-
pling, as shown in the illustration, then pry the coupling out.
NOTICE: Do not bring the screwdriver blade in direct
contact with the flexible coupling's rubber portion.
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PROPELLER SHAFT PROPELLER SHAFTPR±7
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(g) Remove the 2 center support bearing set bolts and theadjusting washers.
HINT: Some vehicles are not equipped with an adjusting
washer.
NOTICE: When removing the set bolts, support the cen-
ter support bearing by hand so that the transmission and
intermediate shaft, and propeller shaft and differential,
remain in a straight line.
Maximum joint angle: 5 
(h) Push the rear propeller shaft straight forward to compress the
propeller shaft and pull out the propeller shaft from the
centering pin of the differential.
NOTICE: Press the propeller shaft straight ahead to keep
the transmission and intermediate shaft aligned straight.
.(i) Pull the propeller shaft out toward the vehicle's rear. NOTICE: The intermediate shaft and propeller shaft
should not be separated.
CENTER SUPPORT BEARING AND
FLEXIBLE COUPLINGS INSPECTION
PR02R±04
1. INSPECT CENTER SUPPORT BEARINGwCheck for cracks in or damage to the cushion.
w Check if the bearing turns smoothly. If the center support
bearing is damaged, worn or does not turn smoothly,
replace it.
2. INSPECT FLEXIBLE COUPLINGS wCheck for cracks in or damage to the front and rear
flexible couplings.
If the flexible coupling is damaged, replace the propeller shaft
assembly.
PR±8
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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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(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±
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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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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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