ect LEXUS SC300 1991 Service Repair Manual

DESCRIPTION
(SC300)
PR038±02
The propeller shaft is a 2±part type, each part consisting of a strong tube having a high centering and di-
mensional precision and a small diameter. The propeller shaft is connected to the transmission and the
differential via 3 joints. No.1 and No.2 joints are hooke universal joint.
NO.3 joint are made of flexible rubber couplings.
PR±20±
PROPELLER SHAFT DESCRIPTION (SC300)
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PROPELLER SHAFT REMOVAL
PR030±02
1. REMOVE EXHAUST FRONT PIPE
(a) Disconnect the oxygen sensor grommets from the floor.
(b) Disconnect the oxygen sensors and heat insulator.
(c) Remove the 4 nuts, boolts and exhaust front pipe.
2. REMOVE EXHAUST CENTER PIPEHINT: To prevent interference of the tail pipe from with the
rear bumper, the front side of the tail pipe is suspended from
the stabilizer bar.
(a) Disconnect the exhaust center pipe from the 2 rings.
(b) Remove the 4 nuts and 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±24
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PROPELLER SHAFT PROPELLER SHAFT
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5. REMOVE PROPELLER SHAFT
(a) Place the matchmarks on the differential companion flangeand flexible coupling.
(b) 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.
(c) Separate the flexible couplings from the 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.
(d) Remove the 2 center support bearing set bolts and the adjusting 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.
(e) Pull the yoke from the transmission.
(f) Insert SST in the transmission to prevent oil leakage. SST 09325±20010 (M/T)
09325±40010 (A/T)
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PROPELLER SHAFT PROPELLER SHAFTPR±25
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CENTER SUPPORT BEARING AND
FLEXIBLE COUPLINGS INSPECTION
PR031±02
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 rear flexible couplings.
If the flexible coupling is damaged, replace the propeller shaft
assembly.
3. INSPECT FLEXIBLE COUPLING CENTERING BUSHING wCheck for damage to the bushing.
If the bushing is damaged, replace the propeller shaft assem-
bly.
PROPELLER SHAFT REPLACEMENT
PR032±02
1. SEPARATE PROPELLER SHAFT AND INTERMEDIATE SHAFT
(a) Place the matchmarks on the flanges.
(b) Remove the 4 nuts, washers and bolts.
2. REMOVE CENTER SUPPORT BEARING FROM INTERMEDIATE SHAFT
(a) Using a chisel and a hammer, loosen the staked part of the
nut.
PR±26
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PROPELLER SHAFT PROPELLER SHAFT
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(b) Using SST to hold the flange, remove the nut.SST 09930±00021
(c) Place the matchmarks on the flange and intermediate shaft.
(d) Remove the flange and center support bearing from the intermediate shaft.
3. INSPECT RUNOUT OF INTERMEDIATE SHAFT AND PROPELLER 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 ON INTERMEDIATE SHAFT
HINT: Install the center support bearing in the direction, as
shown and install the 2 washers.
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PROPELLER SHAFT PROPELLER SHAFTPR±27
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6. INSTALL FLANGE ON INTERMEDIATE SHAFT
(a) Coat the spline of the intermediate with MP grease.
(b) Place the flange on the shaft and align the matchmarks.HINT: If replacing either the center flange or intermediate
shaft, reassemble them so that the front yoke of the inter-
mediate shaft and the rear yoke of the propeller shaft are fac-
ing in the same direction.
(c) Using SST to hold the flange, press the bearing into position by tightening down a new nut.
SST 09330±00021
Torque: 181 N Vm (1,850 kgf Vcm, 134 ft Vlbf)
(d) Loosen the nut.
(e) Torque the nut again.
Torque: 69 N Vm (700 kgf Vcm, 51 ft Vlbf)
(f) Using a punch and a hammer, stack the shaft.
7. INSTALL PROPELLER SHAFT
(a) Align the matchmarks on the flanges and connect the flanges
with 4 bolts, washers and nuts.
HINT: If replacing either the center flange or intermediate
shaft, reassemble them so that the front yoke of the inter-
mediate shaft and the rear yoke of the propeller shaft are fac-
ing in the same direction.
(b) Torque the bolts and nuts.
Torque: 74 N Vm (750 kgf Vcm, 54 ft Vlbf)
PROPELLER SHAFT INSTALLATION
PR04M±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.
PR±28±
PROPELLER SHAFT PROPELLER SHAFT
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(b) Remove SST.
(c) Insert the yoke into the transmission.
(d) Align the matchmarks and install the propeller shaft on thedifferential 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)
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±28)
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PROPELLER SHAFT PROPELLER SHAFTPR±29
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(f) Temporarily install the center support bearing set bolts withthe adjusting washers.
HINT: Use the adjusting washers which were removed.
(g) 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 intervals,
as shown with the vehicle in the unladen condition.
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.
2. INSPECT JOINT ANGLE (See page PR±32)
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, 9 ft Vlbf)
4. INSTALL HEAT INSULATOR
Install 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) Connect 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)
PR±30±
PROPELLER SHAFT PROPELLER SHAFT
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6. INSTALL EXHAUST FRONT PIPE
(a) Install new gaskets.
(b) Install the front pipe.
(c) Install and torque the 4 bolts and new nuts.
Torque: 43 NVm (440 kgf Vcm, 32 ft Vlbf)
(d) Connect both oxygen sensor with heat insulator.
HINT: When connecting the oxygen sensor, turn it clockwise
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.
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PROPELLER SHAFT PROPELLER SHAFTPR±31
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JOINT ANGLE INSPECTION AND
ADJUSTMENT
PR034±02
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.
PR±32
±
PROPELLER SHAFT PROPELLER SHAFT
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