1991 MITSUBISHI 3000GT Service Manual

4-WHEEL STEERING SYSTEM (4WS) -Service Adjustment Procedures37B-5
Rubber hose
13FOOl
Graduated cylinder13FOOllFUNCTION CHECK
_M37FWAA
(1) Raise the vehicle so that all four wheels may turn freely.
(2) Start the engine, running the vehicle at an indicated speed
of about 80
km/h (50 mph).
(3) Turn the steering wheel all the way to left and right and turn
it swiftly, checking to ensure that the rear wheels steer to
the same directions as the front wheels.
REAR OIL PUMP DISCHARGE FLOW VOLUME
CHECKM37FLBA
(1) Disconnect the pressure hose from the rear oil pump and
install the special tool with a rubber hose.
(2) Place the other end of the rubber hose in a container which
permits measurement of flow rate (2-liter graduated cylin-
der).(3) Start the engine. Increase speed slowly, then hold the
indicated speed of 50 km/h (31 mph), measuring discharge
flow volume for 30 seconds.
Caution
While performing this work, continuously add fluid intothe oil reservoir.
Standard value: Approximately
1.0 liter (1.06 qts.)
(4) If the discharge flow volume is extremely high or low, the
rear oil pump should be replaced.
BALL JOINT ROTATION STARTING TORQUE
CHECKM37FECA
(1) Holding the power cylinder tie rod with a spanner, discon-
nect the tie rod and trailing arm.
(2) After swinging the ball joint stud several times, install the
stud nut, then measure the ball joint rotation starting torque
with the special tool.
Standard value: 0.5 Nm (4
in.lbs.) or less
(3) If the rotation starting torque exceeds the standard value,
replace the tie rod end.
(4) If the rotation starting torque is less than the standard
value, check that the ball joint is not loose and operates
smoothly. If not, it may be reused.
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37B-64-WHEEL STEERING SYSTEM (4WS) - Power CylinderPOWER CYLINDER
REMOVAL AND INSTALLATION
M37S&~I
l Cleaning of Pipings with Steam
l Removal of Main Muffler Assembly(Referto GROUP 15- Exhaust Pipe and Muffler.)
Ilo-130Nm
l Installation of Main Muffler Assembly
l Refilling and Bleeding of Power Steering System
(Refer to GROUP 37A-Service Adjustment
\78 Nml;O- 130 Nm
56
ft.lbs.80 - 94 ft.lbs.
Procedures.)l Bleeding of 4WS System
(Refer to P.37B-4.)l Checking of 4WS System for Operation
(Refer to P.37B-5.)‘0 Checking of Wheel Alignment
(Refer to GROUP 34 -Service Adiustment
1 Procedures.)
f @, ’ i%,s. yf ,30Nm,
78 NmIIO-130Nm80 -94 ft.lbs.56 ft.lbs.
80 - 94 ft.lbs.Removal steps
1. Rear shock absorber lower mounting bolt
2. Crossmember bracket
a*3. Crossmember mounting nut
(on differential side)
4. Pressure tube
(RL)5. O-ring
6. Pressure tube (RR)
7. O-ring
8. Oil line clamp bolt
4*9. Tie rod end nut
l * 10. Power cylinder installation bolt
l * 11. Power cylinder
Fluid line flared nut
15 Nm
11 ft.lbs.14FO38
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4-WHEEL STEERING SYSTEM (4WS) - Power Cylinder378-712AOlOE
IlZAO2;91
3A009
Wire
SERVICE POINTS OF REMOVALM37SBM3. REMOVAL OF CROSSMEMBER MOUNTING NUT
(1) Before removing the self-locking nuts, support the
differential case with a transaxle jack.
(2) Remove the self-locking nuts.
9. REMOVAL OF TIE ROD END NUT
Secure the power cylinder on the tie rod side with a
spanner and remove the power cylinder mounting nut.
INSPECTIONM37SCM
TIR ROD SWING TORQUE INSPECTION
(1) Swing the tie rod ten times hard.
(2) Point the tie rod end down, then attach a spring balance as
shown in the illustration to measure swing resistance
(swing torque).
Standard value: 9
- 55 N (2 - 12 Ibs.)
[0.5 - 3 Nm (4 - 26 in.lbs.)l(3) If the swing resistance exceeds the standard value, replace
the tie rod.
(4) If the swing resistance is less than the standard value, the
ball joint may be reused as long as it is not loose and
operates smoothly.
POWER CYLINDER SLIDE RESISTANCE CHECK
(1) Place the piston in a neutral position.
(2) Wrap a wire around the tie rod end, then measure slide
resistance with a spring balance as shown in the illustration.
Standard value: 67 N (15
Ibs.) or less
(3) If the slide resistance exceeds the standard value,
replace,the power cylinder.
(4) If the slide resistance is less than the standard value, the
power cylinder may be reused as long as it is not loose and
slides smoothly.
SERVICE POINTS OF INSTALLATIONM37SDP911. INSTALLATION OF’ POWER CYLINDER
/ 10. POWER
CYLINDER INSTALLATION BOLTS(1) Secure the power cylinder to the crossmember.
(2) Move the power cylinder piston rod over its full stroke
to determine its neutral position.
(3) Align tie rod ends and the installation holes at trailing
arm.
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37B-84-WHEEL STEERING SYSTEM (4WS) - Power Cylinder
(4) When the tie rod ends and the installation holes at the
trailing arm do not meet, loosen the tie rod end securing
nut, then adjust the length. The dust cover fastener clip
should be removed for this.
(5) The difference between the lengths of the left and
right’
Ljtie rods should be less than 1 mm
( ,039 in.).
NOTEThe threads of the tie rod ends may be used as a guide
for this.
DISASSEMBLY AND REASSEMBLYM37SE. -
::::::::::::;::: ::.
&
:::::y .:::5;:;. . . . . . . . .. .
11.
13G0070
Grease: Silicone greaseDisassembly steps
1. Nut**2. Tie rod end assembly3.Clip4.Wirel *5. Dust cover6.Bleedercaps
7.Bleeder screws8.Cylinder assembly
2
13A0128
13G0070
Rod13A025
SERVICE POINTS OF REASSEMBLYM37SHAA5. INSTALLATION OF DUST COVER
Apply the specified grease to the place indicated in the
illustration, then install the dust cover to the cylinder
assembly.
Specified grease: Silicone grease2. INSTALLATION OF TIE ROD END ASSEMBLY
Temporarily attach the tie rod end assembly to the cylinder
assembly at the place of dimension as illustrated.
NOTETo adjust the assembly dimensions of the tie rod end
assembly, remove the dust cover clip and rotate the rod.
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IQ-WHEEL STEERING SYSTEM (4WS) - Control Valve37B-9CONTROL VALVE
Pre-removal Operationl Cleaning of Pipings with Steaml Dratning of Power Steering Fluid(Refer to GROUP 37A - Service Adjustment
Procedures.)
l Removal of Rear Suspension Assembly(Refer to GROUP 34- Rear Suspension Assembly.)
El56I.I
--
iEl7’
1Post-installation Operationl Installation of Rear Suspension Assembly(Refer to GROUP 34 - Rear Suspension Assembly.)l Refillrng and Bleedrng of Power Steering System
(Refer to GROUP 37A-Service AdjustmentProcedures.)l Bleeding of 4WS System(Refer to P.37B-4.)l Checking of 4WS System for Operation
(Refer to P.37B-5.)
M37UA- -
12 Nm
35 Nm24Nm15Nm9 ftlbs.25 ft.lbs.17ft.lbs.
R \
ft.lbs.113012 Nm.\,9ft Ihc
REMOVAL AND INSTALLATION
LRemoval steps
1.Pressure hose2.Pressure tube3.O-ring
4. Pressure tube (RR)
5.O-ring6. Pressure tube (RL)
7.O-ring8. Pressure tube (FL. FR)9.O-ring10.Return pipe11.O-ring
cd
12.Control valve
\35 Nm25 ftlbs.
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37B-10$-WHEEL STEERING SYSTEM (4WS) - Rear Oil Line
REAR OIL LINEM37YFv -
REMOVAL AND INSTALLATION
35 Nm25 ftlbs.
\Removal steps
12 Nm9 ftlbs.
13FOO24
1. Return hose
2. Suction hose
3. Protector
4. Pipe assembly to pressure
tube connection
5. Pipe assembly
6. Suction hose
7. Rubber hose
8. Feed pipe assembly
9. Return pipe assembly
10. Pressure tube assembly to
pipe assembly connection
11. Suction hose
12. Reserve tank
l Cleaning of Pipings with Steam
Post-installation Operationl Refilling and Bleeding of Power Steering System
(Refer to GROUP 37A-Service AdjustmentProcedures.)l Bleeding of 4WS System
(Refer to P.37B-4.)l Checking of 4WS System for Operation
(Refer to P.37B-5.)
INSPECTIONM37YCAnl
Check tubes and pipes for cracking, damage or corrosion.
l
Check hoses for cracking, damage, leakage or fluid seep-
age.l Check flare nuts for damage.
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4-WHEEL STEERING SYSTEM (4WS) - Rear Oil Pump37B-11
REAR OIL PUMP
REMOVAL AND INSTALLATION/
l Draining of Power Steering Fluid
(Refer to GROUP 37A- Service Adjustment
l Removal of Main Muffler Assembly(Refer to GROUP 15 - Exhaust Pipe and Muffler.)
Post-installation Operationl Installation of Main Muffler Assembly(Refer to GROUP 15 - Exhaust Pipe and Muffler.)l Refilling and Bleeding of Power Steering System
(Refer to GROUP 37A- Service AdjustmentProcedures.)l Bleeding of 4WS System
(Refer to P.37B-4.)l Checking of 4WS System for Operation
(Refer to P.37B-5.)
IIO-130Nm80- 94 ft.lbs.Removal steps
1. Rear shock absorber lower mounting bolt4*2. Crossmember bracketa*3. Crossmember mounting nut4.~rry~~,ff~h;t~Jside)
5.Suction hose6. Rear-wheel oil pump7. O-ring80
-94ft.lbs.
13FOO23
NOTEDo not disassemble the rear-wheel oil pump.
M3?MA- -12AOlOS
3
SERVICE POINTS OF REMOVALM37MBAA
2. REMOVAL OF CROSSMEMBER BRACKET / 3. CROSS-MEMBER MOUNTING NUT (ON DIFFERENTIAL SIDE)
(1) Support the differential case with the transmission jack,
then remove the crossmember bracket and crossmem-
ber mounting nut (on the differential side).
(2) Slightly lower the crossmember.
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