LEXUS SC400 1991 Service Repair Manual

SERVICE SPECIFICATIONS
SERVICE DATA
PR01M±06 Shaft runout Limit\
 \
0.8 mm (0.031 in.)
 

Joint angleNo.2 joint±1
5 05 ' + 36 '
  No.3 joint\
 \
15 01 ' + 36 '
TORQUE SPECIFICATIONS
PR01N±07\
 
\

\
Part tightened
 

N
Vm
 

kgf
Vcm
 

ft
Vlbf
\
 \
Intermediate shaft X Transmission 79 805 58
\
 \
Propeller shaft X Differential 79 805 58
\
 
\

\
Crossmember X Body 

13 

130 

8
\
 \
Exhaust center pipe X Exhaust rear pipe 19 195 14
\
 \
Exhaust center pipe X Exhaust front pipe 43 440 32
\
 \
Exhaust front pipe X Exhaust manifold 43 440 32\
 
\

\
Center support bearing X Body
 

49
 

500
 

36
\
 \
Heat insulator X Body 5.4 55 48 in.
Vlbf
±
PROPELLER SHAFT SERVICE SPECIFICATIONSPR±19
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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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PREPARATION
SST (SPECIAL SERVICE TOOLS)
PR02W±03
EQUIPMENT
PR02X±01\
 
\


\

\

Torque wrench
 




\
 
\

\

Dial indicator
\
 
\

\
Vernier calipers
±
PROPELLER SHAFT PREPARATIONPR±21
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PRECAUTION
PR02Y±01
Be careful not to grip the propeller shaft tube too tightly in the vise \
as this will cause deformation.
TROUBLESHOOTING
PR039±02
Use the table to help you find the cause of the problem. The numbers indica\
te the priority of the likely cause
of the problem. Check each part in order. If necessary, replace these parts.
PR±27PR±26 PR±27
PR±27
PR±27
PR±27
PR±26
PR±22±
PROPELLER SHAFT TROUBLESHOOTING
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PROPELLER SHAFT
COMPONENTS
PR02Z±02
±
PROPELLER SHAFT PROPELLER SHAFTPR±23
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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
±
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)
±
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
±
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.
±
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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