1991 MITSUBISHI 3000GT power steering

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-20
STEERING - Power Steering Gear Box
.UBRICATION AND SEALING POINTS
Automatic transmission fluid
13N0022
hid:MITSUBISHI PLUS ATF/Automatic transmission fluid“DEXRON” or “DEXRON II”
13G0070
Grease: Silicone greaseFluid:
MITSUBISHI PLUS ATF/Automatic transmission fluid
“DEXRON” or “DEXRON II”
Sealant:1 3M ART, Part No. 8663 or
equivalent.
L--1
I-
13N0019
Fluid:MITSUBISHI PLUS ATF/Automatic transmission fluid
“DEXRON” or “DEXRON II”
l.?POO,,13Y564
Sealant:3M ART, Part No. 8663 or
equivalent
1360186
Fluid:MITSUBISHI PLUS ATF/
Automatic transmission fluid
“DEXRON” or “DEXRON II”i13FOO30
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STEERING - Power Steering Gear Box37A-21 ~'13K588
SERVICE POINTS OF DISASSEMBLYM37PFAN3. REMOVAL OF DUST SHIELD
Remove the dust shield from the tie rod end.
5. REMOVAL OF BELLOWS BANDS
Using a screwdriver or similar tool, loosen and then remove
Ithe boot retaining band.
7. REMOVAL OF TAB WASHER
Unstake the tab washer which fixes the tie rod and rack
with a chisel.
11. REMOVAL OF END PLUGDisconnect end plug caulking and remove end plug.
14. REMOVAL OF RACK SUPPORT COVERUsing the special tool, remove the rack support cover from
Ithe gear box.
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37A-22
STEERING - Power Steering Gear Box13A0284
Socket
13A0285
\kdY13R0541
Rack stopper
18. REMOVAL OF OIL SEALUsing a plastic hammer, gently tap the pinion to remove it.
21. REMOVAL OF BALL BEARING
/ 22. OIL SEAL
Using a socket, remove the oil seal and the ball bearing
from the valve housing simultaneously.
23. REMOVAL OF
CIRCLIP(1) Turn the rack stopper clockwise until the end of thecirclip comes out of the slot in the rack housing.
(2) Turn the rack stopper anticlockwise to remove thecirclip.
26. REMOVAL OF RACKPull out the rack slowly.
At this time also take out the rack stopper and the rack
bushing simultaneously.
28. REMOVAL OF OIL SEALPartially bend oil seal and remove from rack bushing.
CautionDo not damage oil seal press fitting surface.
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LSTEERING
- Power Steering Gear Box37A-23
13R054f
_ Needlebearing
31. REMOVAL OF BALL BEARINGUse a brass bar to remove the ball bearing from the gear
housing.
32. REMOVAL OF NEEDLE ROLLER BEARINGUse the special tool to remove the needle roller bearing
from the rack housing.
Caution
Do not open special tool excessively to prevent damag-ing housing interior.
33. REMOVAL OF OIL SEAL
/ 34. BACK-UP WASHER
Use a piece of pipe or similar tool to remove the back-up
washer and oil seal from the gear housing.
Caution
Be careful not to damage the inner surface of the rackcylinder of the gear housing.
INSPECTION
RACK
M37PGAHl Check the rack tooth surfaces for damage or wear.
l Check the oil seal contact surfaces for uneven wear.
0 Check the rack for bends.
PINION AND VALVE ASSEMBLY
lCheck the pinion gear tooth surfaces for damage or wear.
l Check for worn or defective seal ring.
BEARINGl Check for roughness or abnormal noise during bearing
operation.
l Check the bearing for play.
l Check the needle roller bearings for roller slip-off.
OTHIERSl Check the cylinder inner surface of the rack housing for
damage.
l Check the boots for damage, cracking or deterioration.
l Check the rack support for uneven wear or dents.
l Check the rack bushing for uneven wear or damage.
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37A-24
STEERING - Power Steering Gear Box
/Oil seal
Back-up washer13A0181L
GuideNeedle roller
bearmg13R0547
MB990927-01
&
13R0378
Vent hole
SERVICE POINTS OF REASSEMBLYM37PHAW
34. INSTALLATION OF BACK-UP WASHER / 33. OIL SEAL(1) Apply a coating of the specified fluid to the outside of
the oil seal.
LJSpecified fluid: MITSUBISHI PLUS
ATF/Automatictransmission fluid “DEXRON” or
“DEXRON II”
(2) Using a tool, press the back-up washer and the oil seal
into the rack housing to the specified position (whereIthe upper surface of the press-in guide coincides with
the stepped part of the press-in tool).
32. INSTALLATION OF NEEDLE ROLLER BEARINGI(1) Apply specified fluid to housing, bearing and oil seal
Ipress fitting surface.
ISpecified fluid: MITSUBISHI PLUS ATF/Automatictransmission fluid “DEXRON” or
I“DEXRON II”(2) Press fit needle roller bearing.
CautionIPress fit straight as valve housing is aluminium.
31. INSTALLATION OF BALL BEARINGPress fit ball bearing.
28. INSTALLATION OF OIL SEAL
/ 27. O-RING
(1) Apply a coating of the specified fluid to the outside of
the oil seal and O-ring.
Specified fluid: MITSUBISHI PLUS
ATF/Automatictransmission fluid “DEXRON” or
“DEXRON II”
(2) Press fit oil seal until it touches rack bush end.
26. INSTALLATION OF RACK(1) Apply a coating of multipurpose grease to the rack teeth
face.
Caution
Do not close the vent hole in the rack with grease.13K583(
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STEERING - Power Steering Gear Box37A-25
Back-up washer1360147
(2) Cover rack serrations with special tool.
(3) Apply specified fluid on special tool.
Specified fluid: MITSUBISHI PLUS
ATFIAutomatictransmission fluid “DEXRON” or
“DEXRON II”(4) Match oil seal center with rack to prevent retainer
spring from slipping and slowly insert rack from power
cylinder side.
Vinyl tape
Rack bushing
136014613K687
Seal rings
MB99131 7
Tapered
side13A0313
25. INSTALLATION OF RACK BUSHINGWrap the rack end with vinyl tape, apply a coating of the
specified fluid, and then install the rack bushing and rack
stopper.
Specified fluid:MITSUBISHI PLUS
ATF/Automatictransmission fluid “DEXRON” or
“DEXRON II”
CautionDo not allow oil seal retainer spring to slip out.
23. INSTALLATION OF CIRCLIPInsert circlip to rack stopper hole through cylinder hole. Turn
rack stopper clockwise and insert circlip firmly.
CautionInsert circlip to rack stopper hole while turning rack
stopper clockwise.20. INSTALLATION OF SEAL RINGS
/ 19. PINION AND
VALVE ASSEMBLY
(I) When installing seal rings, press firmly into valve
groove. Apply specified fluid.
Specified fluid: MITSUBISHI PLUS
ATF/Automatictransmission fluid “DEXRON” or
“DEXRON II”
NOTEBecause the seal rings expand at the time of installa-
tion, use the special tool to compress the seal rings so
that they are well seated.
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