torque MITSUBISHI 3000GT 1991 Service Manual

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

STEERING 2 Service Adjustment Procedures37A-5
13FOOOi13FOOO3SERVICE ADJUSTMENT PROCEDURES
STEERING WHEEL FREE PLAY CHECKM37FABI
1.With engine running (hydraulic operation), set front wheels
straight ahead.
2. Measure the play on steering wheel circumference before
wheels start to move when slightly moving steering wheel
in both directions.
Limit: 30 mm (1.2 in.)
3:When the play exceeds the limit, check for play on steering
shaft connection and steering linkage. Correct or replace.
4. If the free play still exceeds the limit value set steering
wheel straight ahead with engine stopped. Load 5 N
(1 lb.)
towards steering wheel circumference and check play.
Standard values (steering wheel play with engine
stopped): 11 mm
(.43 in.)
If the play exceeds the standard value, remove steering
gear box and check total pinion torque.
STEERING ANGLE CHECKM37FDBK1. Set front wheels on turning radius gauge and measure
steering angle.
Standard values:Inner wheel
33”45’ k 2”
Outer wheel
28”21’2. When not within the standard value, it is probably a toe
problem. Adjust toe (refer to GROUP 33A
- Service
Adjustment Procedures) and recheck.
TIE ROD END BALL JOINT VARIATION CHECK
(SHAFT DIRECTION)M37FPAF1. Hold the ball joint with pliers.
2.Set a caliper gauge as illustrated and measure the displace-
ment with the ball stud compressed.
Limit: 1.5 mm
(.059 in.)
3. If the measured displacement exceeds the limit, replace
the tie-rod end.
Caution
Even if the variation is within the limit, check ball jointstarting torque.
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STEERING - Service Adjustment Procedures13G005E
Tape or markon steering
wheel hub
13FOO4:
Lines atstraight-position-ahead
Dotted linesshow wheel
at desired
positlon
Tape or mark
on
steenngwheel rim
tanceRuler 7’off-center13FOO4;
36 splines
13W589/13FOO45
TIE ROD END. BALL JOINT STARTING TORQUE
CHECK~M37FEBF
1. Disconnect tie rod and knuckle with special tool.~
LJ2. Move ball joint stud several times and install nut on stud.
Measure ball joint starting torque.
Standard value:
0.5 - 3.0 Nm (4 - 26 in.lbs.1
1.0 - 3.0 Nm (9 - 26 in.lbs.)3. When starting torque exceeds the standard value, replace
tie rod end.
4.When the starting torque is under the standard value, check
for play or ratcheting in ball joint.
If none of these, it is still
serviceable.
STEERING WHEEL CENTERINGM37FNAI
SIMPLIFIED STEERING WHEEL CENTERINGDetermining Steering Wheel’s Off Center
1. For the road test, take along chalk or tape and a ruler.
2. Drive straight ahead on an uncambered level surface.
3. When the vehicle’s wheels are pointing straight ahead,
mark the steering wheel hub and column cover with a chalk
or tape line.
4. Stop the vehicle and line up the marks on the hub and
column cover.
5. Place a tape strip
01 mark on the steering wheel rim.
6.Hold a ruler next to the rim as shown in the illustration, and
then steer the steering wheel until it is in the desired
centered position.
7.Record the distance the strip or mark on the rim has moved.
This is how far the steering wheel is off center. If it is more
than 16 mm
(518 in.) off center, it can be centered by
indexing it ten degrees towards the center.
Indexing Steering Wheel to Center It
The steering wheel shaft has 36 splines, allowing the steering
wheel to be indexed in ten-degree increments.
1. Remove the steering wheel.
2.Without disturbing the position of the steering wheel shaft,
re-install the wheel as near on-center as possible.
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STEERING - Service Adjustment Procedures37A-7
L
i
13FOO46
Steering wheel off center left
13K11l13FOO48
Offcenter to leftOff center to left
Off center to rightOff center to right
Turn both tie rods in the same direction.13R055E
PRECISION STEERING WHEEL CENTERINGIn general, the tie rods are adjusted to steer the front wheels in
the same direction that the steering wheel is off center. If the
steering wheel is off center to the left, center it by adjusting the
tie rods to make the front wheels steer toward the left, and vice
versa.
1. Mark the tie rods and tie rod ends with chalk before
loosening the lock nuts.
2. Hold the tie rod with a wrench and loosen the lock nut.
3.Hold the tie rod end with a wrench and turn the tie rod the
desired number of turns.
For 2” or 6 mm
(.25 in.) at the steering wheel rim l/5turn of tie rods
4. Tighten the lock nut to specified torque, taking care not to
turn the tie rod.
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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.
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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.
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37A-18
STEERING - Power Steering Gear Box
MB991 006-01\l\
13R017
8 Mounting clamp13R0077
SERVICE POINTS OF REMOVALM37PBAI3. DISCONNECTION OF TIE-ROD END
Using the special tool, disconnect the tie rod from the
,,
knuckle.LJ9. REMOVAL OF GEAR BOX ASSEMBLY
(1) Move the rack completely to the right and then remove
the gear box from the crossmember.
(2) While tilting the gear box downward, remove it to the
left.
CautionWhen removing the gear box, pull it out carefully
and slowly to avoid damaging the boots.
INSPECTIONM37PCAFGEAR BOX FOR TOTAL PINION TORQUE
Using the special tools, rotate the pinion gear at the rate of one
rotation in approximately 4 to 6 seconds to check the total
pinion torque.
Standard value: 0.6
- 1.3 Nm (5 - 11 in.lbs.)
NOTEMeasure the pinion torque through the whole stroke of the
rack.If the measured value is not within the standard range, first
adjust the rack support cover, and then check the total pinion
starting torque again.
If the total pinion starting torque cannot be adjusted to within
the standard range by adjusting the rack support cover, check
the rack support cover, rack support spring, rack support and
replace any parts necessary.
CHECK THE TIE ROD FOR SWING RESISTANCE
(1) Give
10 hard swings to the tie rod.
(2) Measure the tie rod swing resistance with a spring balance
Standard value: 8
- 18 N (1.8 - 4.0 Ibs.)
[2 - 5 Nm (17 - 43 in.lbs.)](3) If the measured value exceeds the standard value, replace
tie rod assembly.
NOTEEven if the measured value is below the standard value, the
tie rod which swings smoothly without excessive play may
be used.
SERVICE POINTS OF INSTALLATIONM37PDAE10. INSTALLATION OF MOUNTING RUBBER
/ 9. GEAR
BOX ASSEMBLYWhen installing the mounting rubber, align the projection of
the mounting rubber with the indentation in the crossmem-
ber to install the gear box.
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STEERING - Power Steering Gear Box37A-19
SASSEMBLY AND REASSEMBLY
1olIl IOlill
22 Nm
/
16 ft.lbs.
50-55Nm36 - 40 ft.lbs.
90 Nm’65 ftlbs.i07Disassembly steps
I. Tie rod end locking nuts+4 2. Tie rod ends+W I)+ 3. Dust shield4. Bellows clipsl *5. Bellows bands6. Bellows
l *7. Tab washers+4 8. Tie rods9. Feed tubes10. O-rings+4Adjustment of total pinion torque
Cc* *a II. End plug12. Self-locking nut13. Locking nutcc*14. Rack support cover
15. Rack support spring
16. Rack support
17. Valve housingSteering gear seal kit
13FOO3l
M37PE..
1 Flarenut
15 Nm
11 ft.lbs13NOO23
la29
4*l 418.Oil seall a I 9. Pinion and valve assembly
I)* 20. Seal rings4*21. Ball bearing4*22. Oil seal*I) l + 23. Circlip24.Rack stopperl + 25. Rack bushing+e l + 26. RackI)+27.O-ring4I) I)4 28. Oil seal29.Seal rings30.O-ring*I) l + 31. Ball bearing** l + 32. Needle roller bearing4* *4 33. Oil seall l * 34. Back-up washer35.Rack housingTSB Revision

37A-26
STEERING - Power Steerina Gear Box
Apply grease
Approx. 1 mm
l-(Approx. .040 in.)
Tool
13POO76
End plug
Sealant
13K130
’ IEnd plug
r=13K132
MB991 006-01
(2) Apply multipurpose grease to pinion gear and housing
bearing.(3) Wrap vinyl tape around the serrated part so that the oil
seal won’t be damaged when the pinion and valve
assembly is installed to the valve housing.
(4) Mount the pinion and valve assembly to the valve
housing.
18. INSTALLATION OF OIL SEALUsing a tool, press the oil seal into the valve housing.
CautionIn order to eliminate a seal malfunction at the valve
housing alignment surface, the upper surface of the oil
seal should project outward approximately 1 mm
(.040in.) from the housing edge surface.
11. INSTALLATION OF END PLUG
(1) Apply the semi-drying sealant to the threaded part of
the end plug.
Specified sealant: 3M ART Part No. 8663 or equiva-
lent(2) Secure the threaded portion of the end plug at two
places by using a punch.
. ADJUSTMENT OF TOTAL PINION TORQUE
(1) Position rack at its center. With special tool, tighten rack
support cover to 15 Nm (11
ft.lbs.1.(2) In neutral position, rotate pinion shaft clockwise one
turn/4
- 6 seconds with special tool. Return rack
support cover 30”
- 60” and adjust torque to the
standard value.
Standard value: 0.6
- 1.3 Nm (5 - 11 in.lbs.)
Caution1. When adjusting, set the standard value at its
highest value.2. Assure no ratcheting or catching when operat-
ing rack towards the shaft direction.
NOTEWhen it cannot be adjusted within the specified return
angle, check rack support cover components or replace.
ii1
I1
I
I
I
I1
I
I
I
I
yl (
I
I1
I1
I
I1
I
I\(3) After adjusting, lock rack support cover with lock nut.
i/
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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