LEXUS SC400 1991 Service Repair Manual

19. BRAKE PEDAL
(a) Check that pedal for smooth operation.
(b) Check that the pedal has the proper reservedistance and freeplay.
(c) Check the brake booster function.
20. BRAKES At a safe place, check that the brakes do not
pull to one side when applied.
21. PARKING BRAKE
(a) Check that the pedal has the proper travel.
(b) On a safe incline, check that the vehicle is held securely with only the parking brake applied.
22. A U TO M AT I C T RANSMISSION PARK
MECHANISM
(a) Check the lock release button of the selector lever for proper and smooth operation.
(b) On a safe incline, check that the vehicle is held securely with the selector lever in the ªPº
position and all brakes released.
MA00T±0A
UNDER HOOD
23. WINDSHIELD WASHER FLUIDCheck that there is sufficient fluid in the tank.
24. ENGINE COOLANT LEVEL
Check that the coolant level is between the
LEVEL lines on the see±through reservoir at
normal temperature (20 5C (68 5F)).
25. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked with leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
26. BATTERY ELECTROLYTE LEVEL
Check the indicator.
When the indicator color is blue, the condition
is satisfactory. A red color indicates that dis-
tilled water must be added, and white indicates
that charging is necessary. 27. BRAKE FLUID LEVEL
Check that the brake fluid level is near the up-
per level line on the see±through reservoir.
28. ENGINE DRIVE BELT Check drive belt for fraying, cracks, wear or oili-
ness.
29. ENGINE OIL LEVEL
Check that level on the dipstick with the engine
turned off.
30. POWER STEERING FLUID LEVEL Check the level on the dipstick.
The level should be in the ªHOTº or ªCOLDº
range depending on the fluid temperature.
31. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking and foot brake applied, shift the selector into all
positions from ªPº to ªLº, and then shift into ªPº.
(c) Turn and pull out the dipstick and wipe off the fluid with a clean rag.
Re±insert the dipstick fully and check that the
fluid level is in the ªHOTº range.
(d) Perform this check with the fluid at normal driving temperature (70 ± 80
C (158 ± 176
F)).
If the level is at the low side, add fluid.
NOTICE: Do not overfill.
HINT: Wait about 30 minutes before checking
the fluid level after extended driving at high
speeds in hot weather, driving in heavy traffic
or with a trailer.
32. EXHAUST SYSTEM Visually inspect for cracks, holes or loose sup-
ports.
If any change in the sound of the exhaust or
smell of the exhaust fumes is noticed, have the
cause located and corrected.
MA±20
±
MAINTENANCE (1UZ ± FE)
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SERVICE SPECIFICATIONS
SERVICE DATA
PR036±03 Shaft runout Limit\
 \
0.8 mm (0.031 in.)
 Joint angle No.2 joint\
 \
±15 01 ' + 36 '
  No.3 joint\
 \
54' + 36 '
TORQUE SPECIFICATIONS
PR037±04
\
 \
Part tightened NVm kgf Vcm ft Vlbf
\
 \
Propeller shaft x Differential 79 805 58
\
 \
Propeller shaft x Intermediate shaft 74 750 54
\
 \
Intermediate shaft x Center bearing x Universal joint flange   
\
 \
1st 181 1,850 134
\
 \
2nd Loosen nut Loosen nut Loosen nut
\
 \
3rd 69 700 51
\
 \
Center support bearing x Body 49 500 36
\
 \
Oxygen senser x Exhaust front pipe 44 450 33
\
 \
Exhaust front pipe x Exhaust manifold 43 440 32
\
 \
Exhaust center pipe x Exhaust front pipe 43 440 32
\
 \
Exhaust center pipe x Exhaust rear pipe 19 195 14
\
 \
Crossmember x Body 13 130 8
\
 \
Heat insulator x Body 5.4 55 48 in. Vlbf
PR±36±
PROPELLER SHAFT SERVICE SPECIFICATIONS
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PROPELLER SHAFT
PR±1
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DESCRIPTION
(SC400)
PR02N±04
The propeller shaft is a 2±part type, each part consisting of a strong, \
compact precisely balanced tube. The
propeller shaft is connected to the transmission and the differential via 3 joints. No.1 and No.3 joints are
made of flexible rubber couplings. No.2 joint is a Hooke's universal joint. All 3 joints are carefully arranged
in such a way that their shaft angles rest on a straight line. This design\
ensures a precise drive line linearity
from the engine through the differential to minimize noise and vibration.
A shaft length adjusting mechanism is incorporated in order to make prope\
ller shaft removal and reinstalla-
tion easier.
PR±2±
PROPELLER SHAFT DESCRIPTION (SC400)
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PREPARATION
SST (SPECIAL SERVICE TOOLS)
PR01A±04
RECOMMENDED TOOLS
PR01B±02
EQUIPMENT
PR01C±02
\
 
\


\

\

Torque wrench 




\
 
\

\

Dial indicator 


\
 
\


\

\

Vernier calipers
 




±
PROPELLER SHAFT PRECAUTION, TROUBLESHOOTINGPR±3
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PRECAUTION
PR02P±02
Be careful not to grip the propeller shaft tube too tightly in the vise \
as this will cause deformation.
TROUBLESHOOTING
PR019±09
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±8
PR±10
PR±10
PR±10
PR±8
PR±4±
PROPELLER SHAFT PRECAUTION, TROUBLESHOOTING
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PROPELLER SHAFT
COMPONENTS
PR00W±06
±
PROPELLER SHAFT PROPELLER SHAFTPR±5
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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
±
PROPELLER SHAFT PROPELLER SHAFT
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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.
±
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
±
PROPELLER SHAFT PROPELLER SHAFT
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