oil MITSUBISHI 3000GT 1991 Service Manual

37A-1
STEERING
CONTENTSM37AA-A
POWER STEERING GEAR BOX*....................17Steering Wheel Return to Center
Check................................................................8
POWER STEERING HOSES................................32Tie Rod End Ball Joint Startinq Torque
POWER STEERING OIL PUMP. .._....................28Check. . . . . . . . .._.............................. r . . . . . . . . ..I . . . . . .6Tie Rod End Ball Joint Variation Check
SERVICE ADJUSTMENT PROCEDURES5(Shaft direction)................................................5........
Bleeding............................................................10V-Belt Tension Check........................................8
Fluid Level Check............................................9SPECIAL TOOLS....................................................3Fluid Replacement
............................................9
/
bOil Pressure Switch Check
SPECIFICATIONS2............................12................................................Oil Pump Pressure Test
....................................1 1General Specifications....................................2Stationary Steering Effort Check
....................8Lubricants............................................................3Steering Angle Check
5Sealant and Adhesives....................................3........................................Steering Wheel Centering
6Service Specifications....................................2................................Steering Wheel Free Play Check
....................5STEERING WHEEL AND SHAFT*....................13
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(1)A Supplemental Restraint System (SRS), which uses a driver-side air bag, has been installed in the 3000GT.(2)The SRS includes the following components: impact sensors, SRS diagnosis unit: SRS warning light, air bagmodule, clock spring, interconnecting wiring. Other SRS-related components (that may have to be
removed/installed in connection with SRS service or maintenance) are indicated in the table of contents byan asterisk (*).
WARNING!(I)Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (from
rendering the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized MITSUBISHI dealer.(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B
-Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.

37A-2SPECIFICATIONS
STEERING - Specifications
GENERAL SPECIFICATIONS
M37CA-A
LA,Items
Steering wheel
Steering wheel O.D.
mm (in.)
Gear box
Steering gear type
Power steering oil pump
Oil pump type
Displacementcm3/rev. (cu.in./rev.)
Relief set pressureMPa (psi)
Specifications
390 (15.4)
Rack and pinion
Vane type
9.6 t.59)
8(1,138)
SERVICE SPECIFICATIONSM37CB-A
!msSpecifications
andard value
Steering wheel free play (with engine stopped)
mm (in.)11 (43)
Steering angle
Inner wheel33”45’ 2 2”
Outer wheel28”21’
Tie rod end ball joint starting torqueNm (in.lbs.)
FWD0.5 - 3.0 (4 - 26)
AWDl.O-3.0(9-26)
Stationary steering effortN (Ibs.)35 (8) or less
V-belt deflectionmm (in.)
When belt tension is inspected or readjusted9-11 (.35-.43)
When new belt is installed7 - 8.5 (.28 - .33)
Oil pump pressureMPa (psi)
Pressure gauge valve closed7.5-8.2 (1,067- 1,166)
Pressure gauge valve opened0.8-1.0(114-142)
Oil pressure switch operating pressureMPa (psi)
Oil pressure switch contacts closed (continuity)
1.5-2.0(213-284)
Oil pressure switch contacts opened (no continuity)0.7-1.2(100-171)
Total pinion torqueNm (in.lbs.)0.6-1.3(5-11)
Tie-rod joint swing resistanceN (Ibs.)8-18(1.8-4.0)
Tie-rod joint swing torqueNm (in.lbs.)2-5(17-43)nit
Steering wheel free play (when hydraulic operation)mm (in.) 30 (1.2)
Variation of tie rod end ball joint shaft direction
mm (in.)1.5 i.059)
Oil pump pressure
Pressure gauge valve opened
MPa (psi)1.5 (213)
Space between vane and rotormm (in.)0.06 (0024)
LJ’
I
I
L’l
1 TSB Revision

STEERING -Specifications / Special Tools37A-3
LUBRICANTSM37CD-A
L
/
b
ItemsSpecified lubricantQuantity
Power steering gear box
BearingMITSUBISHI PLUS ATF/Automatic trans-As requiredmission fluid “DEXRON” or “DEXRON II”
O-ringMlTSUBlSHl.PLUS ATF/Automatic trans-As requiredmission fluid “DEXRON” or “DEXRON II”
Oil sealMITSUBISHI PLUS ATF/Automatic trans-As required
mission fluid “DEXRON” or “DEXRON II”
Special tool (MB991 213)MITSUBISHI PLUSATFIAutomatic trans-As requiredmission fluid “DEXRON” or “DEXRON II”
Pinion and valve assemblyMITSUBISHI PLUS ATF/Automatic trans-As required
seal ring partmission fluid “DEXRON” or “DEXRON II”
BellowsSilicone greaseAs required
Power steering oil pump
Power steering fluidMITSUBISHI PLUS
ATF/Automatic trans-0.9 liter (.95 qt.)
mission fluid “DEXRON” or “DEXRON II”
Flow control valveMITSUBISHI PLUS ATF/Automatic trans-As requiredmission fluid “DEXRON” or “DEXRON II”
Friction surface of rotor, vane, cam ringMITSUBISHI PLUS ATF/Automatic trans-As required
and pump covermission fluid “DEXRON” or “DEXRON II”
O-ringMITSUBISHI PLUS ATF/Automatic trans-As requiredmission fluid “DEXRON” or “DEXRON II”
SEALANT AND ADHESIVESM37CE-A
Items
Power steering gear box
End plug screw
Power steering rack support cover screw
Dust cover
Specified sealant and adhesive
3M ART Part No. 8663 or equivalent
3M ART Part No. 8663 or equivalent
3M ART Part No. 8663 or equivalent
SPECIAL TOOLSM37DA.A
ToolNumberNameUseII
MB991 113-01Steering linkage
pullerDisconnection of tie-rod end
MB991 006-01Preload socketMeasurement of the total pinion torqueTSB Revision

37A-4STEERING - Special Tools
easuremen
MB990993-01Power steering oilpressure gauge
adapter (pump side)Measurement of oil pressure
MB991 204
Removal of rack housing needle bearingTSB Revision

37A-8STEERING - Service Adjustment Procedures13FOOO3
13FOOOl
STATIONARY STEERING EFFORT CHECKM37FFAM
1.With the vehicle stopped on a flat, paved surface, turn the
steering wheel to the straight ahead position.
2. Start the engine and set it to 1,000
+ 100 rpm.d
Caution
After checking the engine speed, there must be a returnto the standard idling speed.
3. Attach a spring balance to the outer circumference of the
steering wheel and measure the steering force required to
turn the steering wheel from the straight ahead position to
the left and right (within a range of 1.5 turns).
Also check to be sure that there is no significant fluctuation
of the required steering force.
Standard value:
Steering effort35 N (8 Ibs.) or less
Fluctuation allowance
6 N (1.3 Ibs.) or less
STEERING WHEEL RETURN TO CENTER CHECK
M37FGACiTo make this test, conduct a road test and check as follows.
1.Make both gradual and,sudden turns and check the steering
“feeling” to be sure that there is no difference in the
steering force required and the wheel return between left
and right turns.
2. At a speed of 35 km/h (22 mph), turn the steering wheel
90”. and release the steering wheel after 1 or 2 seconds. If
the steering wheel then returns 70” or more, the return can
be judged to the satisfactory.
NOTEThere will be a momentary feeling of “heaviness” when the
wheel is turned quickly, but this is not abnormal. (This is
because the oil pump discharge amount is especially apt to
be insufficient during idling.)
V-BELT TENSION CHECKM37FHAJCheck to be sure that the belt is not damaged and that the
V-belt is correctly attached to the groove of the pulley.
NOTEIf there is abnormal noise or belt slippage, check the belt
tension and check for unusual wear or abrasion, or damage, of
the pulley contact surface, and for scars or scratches on the
pulley.d
TSB RevisionI

STEERING - Service Adjustment Procedures37A-9
LL:13N002E
FluId f[uctuatlon
While
engineWhile engme
runningstopped13uo13:
Return ho
Vinyl hose13AO142
j
1.Press in V-belt at the illustrated position with about 100 N
(22 Ibs.) and measure deflection.
Standard value:
When belt tension is inspectedor readjusted
When new belt is installed
/ 9 - 11 mm (.35 - .43 in.)
I
’ 7 - 8.5 mm (.28 - .33 in.)
2.If the deflection is out of the standard values, adjust the belt
tension using the following procedure.
(1) Loosen the tension pulley’s securing bolts A and
B.(2) Mount the extension bar on the tension pulley.
(3) While increasing the tension of the V-belt with the
extension bar, retighten the tension pulley’s securing
bolts A and B in the order mentioned.
FLUID LEVEL CHECKM37FlAJ
1.Park the vehicle on a flat, level surface, start the engine, and
then turn the steering wheel several times to raise the
temperature of the fluid to approximately 50
- 60°C (122 -
140°F).
2.With the engine running, turn the wheel all the way to the
left and right several times.
3.Check the fluid in the oil reservoir for foaming or milkiness.
Check the difference of the fluid level when the engine is
stopped, and while it is running. If the fluid level changes
considerably, air bleeding should be done.
FLUID REPLACEMENTM37FJAL1. Raise the front wheels on a jack, and then support them
with rigid racks.
2. Disconnect the return hose connection.
3. Connect a vinyl hose to the return hose, and drain the oil
into a container.
4. Disconnect the high-tension cable, and then while operat-
ing the starting motor intermittently, turn the steering
wheel all the way to the left and right several times to drain
all of the fluid.
Caution
Be careful not to position the high-tension cable nearthe carburetor or the delivery pipe.
5.Connect the return hoses securely, and then secure it with
the clip.
6.Fill the oil reservoir with the specified fluid up to the lower
position of the filter, and then bleed the air.
Specified fluid:MITSUBISHI PLUS ATF/Automatic
transmission fluid “DEXRON” or
“DEXRON II”
1 TSB Revision

37A-10STEERING - Service Adjustment Procedures
BLEEDINGM37FKAl
1.Jack up the front wheels and support them by using a floor
stand.
2. Manually turn the oil pump pulley a few times.
3. Turn the steering wheel all the way to the left and to the
right several times.
4. Disconnect the high-tension cable, and then, while operat-
ing the starting motor intermittently, turn the steering
wheel all the way to the left and right several times (for 15
to 20 seconds).
Caution1. During air bleeding, replenish the fluid supply so
that the level never falls below the lower position ofthe filter.
2. If air bleeding is done while engine is running, the
air will be broken up and absorbed into the fluid; besure to do the bleeding only while cranking.
5. Connect the ignition cable, and then start the engine
(idling).
6.Turn the steering wheel to the left and right until there are
no air bubbles in the oil reservoir.
7.Confirm that the fluid is not milky, and that the level is up to
the specified position on the level gauge.
8. Confirm that there is very little change in the fluid level
when the steering wheel is turned left and right.
Fluid level change:wlthln 5 mm 1.2 in.)I
9.Check whether or not the change in the fluid level is within
5 mm
(.2 in.) when the engine is stopped and when it is
Irunning.
Caution
While enginerunningWhile enginestopped13UOl1. If the change of the fluid level is 5 mm
I.2 in.) or
more, the air has not been completely bled from thesystem, and thus must be bled completely.
2. If the fluid level rises suddenly after the engine is
stopped, the air has not been completely bled.
3. If air bleeding is not complete, there will be
abnormal noises from the pump and the flow-
control valve, and this condition could cause a
lessening of the life of the pump, etc.
LJ
I
I~
I~
I
LJ ,
I
\TSB Revision

STEERING - Service Adjustment Procedures37A-11
Shut-off valve
Pressure gauge(FuW dose)
Temperature
Shut-off valve
OIL PUMP PRESSURE TESTM37FLAl-l
CHECKING THE OIL PUMP RELIEF PRESSURE
1.Disconnect the pressure hose from the oil pump, and then
connect the special tools.
2. Bleed the air, and then turn the steering wheel several
times while the vehicle is not moving so that the tempera-
ture of the fluid rises to approximately 50
- 60°C (122 -
140°F).3. Start the engine and idle it at 1,000
+ 100 rpm.
4. Fully close the shut-off valve of the pressure gauge and
measure the oil pump relief pressure to confirm that it is
within the standard value range.
Standard value: 7.5
- 8.2 MPa (1,067 - 1,166 psi)
Caution
Pressure gauge shut off valve must not remain closedfor more than 10 seconds.
5.If it is not within the standard value, overhaul the oil pump.
6. Remove the special tools, and then tighten the pressure
hose to the specified torque.
7. Bleed the system.
CHECKING THE PRESSURE UNDER NO-LOAD CONDI-
TIONS
1.
2.
3.
4.
5.
6.
7.Disconnect the pressure hose from the oil pump, and then
connect the special tool.
Bleed the air, and then turn the steering wheel several
times while the vehicle is not moving so that the tempera-
ture of the fluid rises to approximately 50
- 60°C (122 -
140°F).Start the engine and idle it at 1,000
+ 100 rpm.
Check whether or not the hydraulic pressure is the standard
value when no-load conditions are created by fully opening
the shut-off valve of the pressure gauge.
Standard value: 0.8
- 1.0 MPa (114 - 142 psi)
Limit: 1.5
MPa (213 psi)
If it is not within the standard value, the probable cause is a
malfunction of the oil line or steering gear box, so check
these parts and repair as necessary.
Remove the special tools, and then tighten the pressure
hose to the specified torque.
Bleed the system.
TSB Revision

37A-12STEERING - Service Adjustment Procedures
Shut-off valvePressure gaugeTemperature (MB990662-01)(Fully open)I
13AO146
-01)
Shut-off
Adapter
Pressure gaugevalve
(MB990993-01)(MB990662-01) /
\Temperature
1310148
-01)
CHECKING THE STEERING GEAR RETENTION HYDRAULIC
PRESSURE
1.
2.
3.
4.
5.
6.
7.
8.Disconnect the pressure hose from the oil pump, and then
/connect the special tools.
Bleed the air, and then turn the steering wheel several
‘dtimes while the vehicle is not moving so that the tempera-
ture of the fluid rises to approximately 50
- 60°C (122 -
140°F).Start the engine and idle it at 1,000
& 100 rpm.
Fully close and fully open the shut-off valve of the pressure
gauge.Turn the steering wheel all the way to the left or right; then
check whether or not the retention hydraulic pressure is the
standard value.
Standard value: 7.5
- 8.2 MPa (1,067 - 1,166 psi)
When not within the standard value, overhaul the steering
gear box.
Remeasure fluid pressure.
Remove the special tools, and then tighten the pressure
hose to the specified torque.
Bleed the system.
OIL PRESSURE SWITCH CHECKM37FUAC
1.
2.
3.
4.
5.
6.
7.
8.Disconnect the pressure hose from the oil pump, and then
connect the special tools.
Bleed the air, and then turn the steering wheel several
times while the vehicle is not moving so that the tempera-
ture of the fluid rises to approximately 50
- 60°C (122 -
140°F).dThe engine should be idling.
Disconnect the connector for the oil pressure switch, and
place an ohmmeter in position.
Gradually close the shut-off valve of the pressure gauge and
increase the hydraulic pressure then check whether or not
the hydraulic pressure that activates the switch is the
standard value.
Standard value: 1.5
- 2.0 MPa (213 - 284 psi)
Gradually open the shut-off valve and reduce the hydraulic
pressure; then check whether the hydraulic pressure that
deactivates the switch is the standard value.
Standard value: 0.7
- 1.2 MPa (100 - 171 psi)
Remove the special tools, and then tighten the pressure
hose to the specified torque.
Bleed the system.
TSB Revision

STEERING- Power Steering Gear Box
POWER STEERING GEAR BOX
/REMOVAL AND INSTALLATION37A-17
M37PA- -
i
i/
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