wheel MITSUBISHI 3000GT 1991 Service Manual

37A-14
STEERING - Steering Wheel and Shaft
13R0654
SERVICE POINTS OF REMOVALM37GBAV1. REMOVAL OF AIR BAG MODULE
(1) Remove the air bag module mounting nut using a
socket wrench from the back side.
(2) To remove the clock spring connector (squib connector)
from the air bag module, force the lock outward and pry
it with a standard screwdriver, as shown in the
illustration at the left, to make sure that no undue force
is exerted to the connector when it is removed.
CautionWait at least 30 seconds after disconnecting the
battery cable before doing any further work. The
SRS system is designed to retain enough voltage todeploy the air bag for a short time even after the
battery has been disconnected, so serious injury
may result from unintended air bag deployment if
work is done on the SRS system immediately afterthe battery cable is disconnected.
(3) The removed air bag module should be stored in a
clean, dry place with the pad cover face up.
2. REMOVAL OF STEERING WHEEL
Remove the steering wheel by using a steering wheel
puller.
CautionDo not hammer on the steering wheel to remove it;
doing so may damage the collapsible mechanism.
SERVICE POINT OF INSTALLATIONM37GDAR2. INSTALLATION OF STEERING WHEEL
Line up the “NEUTRAL” mark of the clock spring with the
mating mark before installing the steering wheel.
CautionIf the clock spring’s mating mark is not properly
aligned, the steering wheel may not be completely
rotational during a turn, or the flat cable within the
clock spring may be severed, obstructing normal
operation of the SRS and possibly leading to serious
injury to the vehicle’s driver.1
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STEERING - Steering Wheel and Shaft
DISASSEMBLY AND REASSEMBLYM37GE- -
Disassembly steps
1. Boot2. Cover assemblyI)* 3. Bearing4. Joint assembly*+ 5. Special boltsl * l a6. Steering lock bracket+* I)* 7. Steering lock cylinder8.Steering column assembly
13A0170
Steering lock cylinder13FOO51
SERVICE POINTS OF DISASSEMBLYM37GFAS
6. REMOVAL OF STEERING LOCK BRACKET / 7. STEER-
ING LOCK CYLINDERIf it is necessary to remove the steering lock cylinder, use a
hacksaw to cut the special bolts at the steering lock bracket
side.
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37A-16STEERING - Steering Wheel and Shaft13E;O613FOO5
inyl tape13NOOl;
INSPECTIONM37GGAKl Check the steering shaft for play and round movement.
l Check the joints for play, damage, or rough movement.
l Check the joint bearing for wear and damage.
l Check the dust shield for damage.
SERVICE POINTS OF REASSEMBLYM37GHBE7. INSTALLATION OF STEERING LOCK CYLINDER
/ 6.
STEERING LOCK BRACKET / 5. SPECIAL BOLT
(1) When installing the steering lock cylinder and steering
lock bracket to the column tube, temporarily install the
steering lock in alignment with the column boss.
(2) After checking that the lock works properly, tighten the
special bolts until the head twists off.
CautionThe steering lock bracket and bolts must be re-
placed with new ones when the steering lock
cylinder is installed.3. INSTALLATION OF BEARING
(1) Fill the inside of the bearing with multipurpose grease.
(2) Install the bearings to the shaft on the joint assembly.
(3) Wrap vinyl tape approximately one and one-half times
around the concave circumferences of the bearings,
and then press fit the bearings into the cover assembly.
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STEERING- Power Steering Gear Box
POWER STEERING GEAR BOX
/REMOVAL AND INSTALLATION37A-17
M37PA- -
i
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Pre-removal ODerationl Draining of the Power Steering Fluid
(Refer to P.37A-9.)l Removal of Front Exhaust Pipe(Refer to GROUP 15 - Exhaust Pipe1 and Main Muffler.)1l Removal of Transfer Assembly
(Refer to GROUP 22 -Transfer.)
Post-installation Operationl Installation of Transfer Assembly
(Refer to GROUP 22 -Transfer.)
l Installation of Front Exhaust Pipe(Refer to GROUP 15 - Exhaust Pipeand Main Muffler.)l Supplying of the Power Steering Fluid
(Refer to P.37A-9.)l Bleeding of the Power Steering Fluid Line
(Refer to P.37A-IO.)l Checking of Steering Wheel Position with
Wheels Straight Ahead
l Adjustment of the Front Wheel Alignment
(Refer to GROUP 33A-Service AdiustmeniProcedures.)Removt
50 Nm
c40 Nm
29 ftlbs.
/60-70
Nm43 - 51ft.lbs.60-70Nm43 - 51ft.lbs.
36
ft.lb
35 Nm
25 ft.lbs.
15 Nm
11 ftlbs.
18 Nm
lal steps
1. Joint assembly and gear box connecting bolt
2. Cotter pin
3. Tie-rod end and knuckle connecting nut
4. Left member
5. Right member
6. Stabilizer bar bracket
7. Connection of steering gear box with 4WS
oil line
8. Clamp
9. Gear box assemblv
*a 10. Mounting rubber70 Nm51 ftlbs.13FOOE.5TSB Revision

37B-1
li 4-WHEEL STEERING
SYSTEM (4WS)
CONTENTSMWAA-0
CONTROL VALVE................................................9SPECIAL TOOLS....................................................2
POWER CYLINDER............................................6SPECIFICATIONS................................................2
REAR OIL LINEGeneral Specifications
....................................2....................................................10Lubricants...............................................:............2
REAR OIL PUMP....................................................11Service Specifications....................................2
LJ
SERVICE ADJUSTMENT PROCEDURES . . . . . .4TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._._._3Ball Joint Rotation Starting Torque Check
. . . .5Bleeding
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._______._4
Function Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Rear Oil Pump Discharge Flow Volume
Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._...........................5

37B-24-WHEEL STEERING SYSTEM (4WS) -Specifications / Special Tools
SPECIFICATIONS
GENERAL SPECIFICATIONSM37CA-B
Items
Power steering gear box
Type
Oil pump
Type
Displacement
cm”/rev. (cu.in./rev.)
Relief set pressure
MPa (psi)
Rear oil pump
Type
Displacement
cm’/rev. (cu.in./rev.)
Relief set pressure
MPa (psi)
Power cylinder
Type
Strokemm (in.)
Specifications
Rack and pinion
Vane type
9.6 (0.59)
8 (1,138)
Vane type
3.3 (0.20)
4 (569)
Hydraulic double action type
20 i.78) [one side 10 (.39)1
SERVICE SPECIFICATIONSM37CEB
Items
Standard value
Specifications
Rear oil pump displacement [at speedometer reading of
31 mph (50 km/h) for 30 seconds]liter (qts.)
Power cylinder ball joint rotation starting torqueNm (in.lbs.)
Power cylinder tie rod swing torqueN (Ibs.) [Nm (in.lbs.)]
Power cylinder slide resistanceN (Ibs.)
Approx. 1 .O (1.06)
0.5 (4) or less
9 - 55 (2 - 12) IO.5 - 3.0 (4 - 26)l
67 (15) or less
LUBRICANTSM37CD.B
,II
Items
Power steering fluid
Dust cover
Specified lubricant
MITSUBISHI PLUS
ATFiAutomatic Trans-mission fluid “DEXRON” or “DEXRON II”
‘Silicone grease
Quantity
1.45 liter (1.53 qts.)
As requiredSPECIAL TOOLS
M37DA-6
MB990993-01Power steering oilpressure gauge
Measurement of fluid flow volumeTSB Revision

4-WHEEL STEERING SYSTEM (4WS) - Troubleshooting
TROUBLESHOOTING
37B-3
M37EMKBefore inspecting, check the following items:
l Oil pump drive belt tension
lEnsure that the suspension has not been mod-@Power steering fluid level, and air in the system
ified
l Engine
Idle soeed and even idle
lTire and wheel size, specifications, air pressure,
l Oil leakage
balance and amount of wear
l Steering wheel type
l Wheel alignment
Malfunction symptom
4WS does not operateMalfunctioning system
Power cylinderInspection item
Tie rod swing torque
Power cylinder slide resistance
Rear oil pump
Flow volume check
Control valve
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Poor steering feelingSteering gears and linkage
Rack cracks or deformationFeeling of friction in steering
Poor steering return
Steering wheel efforts
excessive
Control valve
Oil leakage from control valve jornt
Rear wheels cannot be
steered
Poor rear wheels return
Hydraulic pressure for rear
wheel is constantly high
Long rear wheel steering
delayPoor steering response
Poor steering returnPower cylinder
Oil lineOil reservoir
Control valve
Power cylinder
Rear oil pump
Power cylinder
Oil leakage from piston rod
Pressure hose breakage
Oil reservoir deformation or oil leakage
Stuck control valve spool
Stuck power cylinder
Relief valve remains open
Excessive power cylinder friction-
Looseness in power cylinder tie rod ball jo.int
Ball joint dust cover cracks
Poor rear wheel steeringresponsePoor rear wheel steeringrange
Poor steerability (extremetire wear)Control valve
Power cylinder
Rear oil pump
Power cylinder
Oil leakage from control valve spool
Oil leakage from power cylinder
Extreme oil pump internal wear
Tie rod length improperly adjusted after toe-inadjustment
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37B44-WHEEL STEERING SYSTEM (4WS) -Service Adjustment ProceduresSERVICE ADJUSTMENT PROCEDURES
M37FKAH
BLEEDING,LJ(1) Bleed air from power steering system (Refer to GROUP
37A
- Service Adjustment Procedures.)
(2) Lift up the vehicle.
(3) Start the engine and let it idle.
(4) Loosen the bleeder screw on the left side of the control
valve and set the special tool to the bleeder screw.
(5) Turn the steering wheel all the way to the left, immediately
returning it half way back.
At this time confirm that air is discharged with the fluid.
(6) Repeat step (5) two or three times, then check to ensure
that all air has been bled from the system.
(7) Repeat steps (4) through (6) for the right side bleeder
sc,rew, turning the steering wheel to the right this time.
(8) Loosen the power cylinder bleeder screw and set the
special tool to the bleeder screw.
Caution
Loosen the bleeder screw about 30 to 45 degrees, andsecure it with the special tool (rotation prevention
metal fixtures) so as not to be loosened more.
(9) Start the engine, running the vehicle at an indicated speed
I/l1Iof about 70-80 km/h (43-50 mph) to circulate the fluid.
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Caution
When replenishing the fluid, take special care as all fourIwheels will be rotating.
Fluid level difference within
5 mm (.20 in.)
While
engineWhile engine isIS runningstopped13lJO13~(lO)Maintain an indicated speed of about 30-40 km/h (19-25
mph), turning the steering wheel all the way to both left and
right.
When the wheel is steered all the way in either direction,
pressure will rise and air will circulate inside the tube
(special tool). Check to ensure that this air is discharged into
the oil reservoir.
(1 l)Repeat step (10) several times until that all air in the system
has been bled.
(12)Ensure that the difference in the fluid levels when the
engine is running and when it is stopped are within 5 mm(.20 in.).
If the difference exceeds 5 mm
(.20 in.), there is still air in
the system and it must be bled again.
Caution
If air has not been completely bled from the system, the
pump will make a humming sound or an unusual noise ,,
will come from the flow control valve; this also
dcontributes to shortened pump life.
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4-WHEEL STEERING SYSTEM (4WS) -Service Adjustment Procedures37B-5
Rubber hose
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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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