power steering MITSUBISHI LANCER EVOLUTION IV 1998 User Guide

37A-1
STEERING
CONTENTS
SERVICE SPECIFICATIONS 2. . . . . . . . . . . . . .
SPECIAL TOOLS 2. . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 2. . . . . . . . . . . . . . . . . .
1. Steering Angle Check 2. . . . . . . . . . . . . . . . .
2. Oil Pump Belt Tension Check and
Adjustment 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
STEERING WHEEL
<EVOLUTION-IV RS> 3. . . . . . . . . . . . . . . . . . . .
POWER STEERING GEAR & LINKAGE 3. . .
POWER STEERING OIL PUMP 7. . . . . . . . . . .
POWER STEERING FLUID COOLER 9. . . . .

STEERING –
Steering Wheel <EVOLUTION-IV RS> /
Power Steering Gear & Linkage37A-3
STEERING WHEEL
<EVOLUTION-IV RS>
REMOVAL SERVICE POINT
STEERING WHEEL REMOVAL
(1) Peel off the dual lock fasteners from the steering wheel
spokes and remove the horn pad.
(2) Remove the bolts indicated by arrows in the illustration
and remove the steering wheel from the boss plate.
(3) Using the special tool, remove the boss plate from the
steering column.
POWER STEERING GEAR &
LINKAGE
For removal, installation and inspection procedure, follow the
conventional procedures except the following.
INSPECTION
PINION TOTAL TURNING TORQUE
The conventional procedures apply except for the standard
value.
Standard value:
Total turning torque 0.9 to 1.7 Nm {9 to 17 kgf
cm}
Torque fluctuations 0.4 Nm {4 kgf
cm} or less
Dual lock
fastener
Boss plate
MB990803

STEERING – Power Steering Gear & Linkage37A-4
DISASSEMBLY AND REASSEMBLY
1 2
3
4
5 6
7
8 9 10 11 12 13 14 15
16
17
1833
20
35
22 23
24 25 26
27 29
31
Unit: Nm {kgf
m}
22 {2.2}
3034
49 – 59
{5.0 – 6.0}
28
19
21
59 {6.0}
25 {2.5}
59 { 6.0}
1
13 {1.3}
88 {9.0}
7
32
10 2 22
20
18
7
1034
16
30
3128 27
Steering gear seal kit
Flare nut
Repair kit grease
Disassembly steps
1. Feed pipe
2. O-ring
N3. Lock nut
N4. Tie rod end
M5. Dust cover
6. Clip
L7. Band
8. Bellows
K9. Tie rod
K10. Tab washer
JPinion total turning torque adjustment
11. Lock nut
A12. Rack support cover
13. Support spring
14. Rack support
I15. End plug
16. Lock nut
17. Valve housing assemblyBH18. Lower oil seal
B19. Pinion & valve assembly
CG20. Seal ring
DF21. Upper bearing
DF22. Upper oil seal
23. Valve housing
EE24. Circlip
F25. Rack stopper
FD26. Rack bushing
GD27. Oil seal
28. O-ring
FC29. Rack assembly
C30. Seal ring
31. O-ring
HB32. Lower bearing
IB33. Needle bearing
JA34. Oil seal
35. Gear housing

STEERING – Power Steering Gear & Linkage37A-5
LUBRICANT AND SEALANT APPLICATION POINTS
Same as before.
DISASSEMBLY SERVICE POINT
Follow the conventional procedures.
REASSEMBLY SERVICE POINTS
Follow the conventional procedures except followings.
AOIL SEAL INSTALLATION
CRACK ASSEMBLY INSTALLATION
(1) Apply a coating of repair kit grease to the rack tooth
face.
Caution
Do not close the vent hole in the rack with grease.
(2) Cover rack serrations with special tool.
(3) Apply the specified fluid on the special tool, seal ring
and O-ring surfaces.
Specified fluid:
MITSUBISHI GENUINE ATF II
Caution
Do not use ATF-SP II.
(4) Slowly insert the special tool-covered rack into the gear
housing from power cylinder side.
Caution
When inserting the rack, align the oil seal center with
the tip of the special tool to prevent the retainer spring
from slipping.
MB991197 Gear housing
Oil seal
MB991199
Vent hole
Seal ring, O-ring
MB991214
Oil seal

STEERING – Power Steering Gear & Linkage37A-6
JADJUSTMENT OF PINION TOTAL TURNING
TORQUE
(1) With special tool, tighten rack support cover to 15 Nm
{1.5 kgf
m}.
(2) Return rack support cover approx. 30
.
(3) Using the special tools, rotate the pinion shaft at the
rate of one rotation in approximately 4 to 6 seconds to
check that the turning torque and the torque fluctuation
confirm to the standard values.
Standard value:
Pinion total turning torque
0.9 – 1.7 Nm {9 – 17 kgf
cm}
Torque fluctuation 0.4 Nm {4 kgf
cm} or less
(4) If either the turning torque or the torque fluctuation
deviates from the standard value, turn back the rack
support cover within the range of 0 to 30
to adjust it
for the standard value.
Caution
1. When adjusting, set the standard value at its
highest value.
2. Assure no ratcheting or catching when operating
rack towards the axial direction.
3. Be sure to measure the turning torque through
the whole stroke of the rack.
NOTE
If the standard value cannot be obtained by turning back
the rack support cover within the specified angle range,
check rack support cover components and replace as
required.
NTIE ROD END / LOCK NUT INSTALLATION
Turn down the tie rod until the dimension shown in the
illustration is reached; then, temporarily tighten the lock nut.
NOTE
The lock nut is to be tightened to the specified torque after
toe-in has been adjusted with the steering gear & linkage
mounted in the vehicle.
MB990607
MB991006
End of groove in
which bellows fitsLock nut
197.2 mm <EVOLUTION-IV>
212.2 mm <EVOLUTION-V>

STEERING – Power Steering Oil Pump37A-7
POWER STEERING OIL PUMP
<EVOLUTION-IV>
REMOVAL AND INSTALLATION
Pre-removal Operation
Power Steering Fluid DrainingPost-installation Operation
(1) Power Steering Fluid Supplying
(2) Drive Belt Tension Adjusting
(Refer to GROUP 11 – On-vehicle Service.)
12 3
4 5
6 7
8 9 10
Unit: Nm {kgf
m}
49 {5.0}
59 – 69
{6.0 – 7.0} 10 – 12
{1.0 – 1.2}39 {4.0}
49 {5.0}
18 {1.8}
12 {1.2}
39 {4.0}
Removal steps
1. Drive belt
2. Pressure switch connector
3. Suction hose
4. Pressure hose
5. O-ring6. Heat protector
7. Bolt
8. Bolt
9. Oil pump assembly
10. Oil pump bracket

STEERING – Power Steering Oil Pump37A-8
<EVOLUTION-V>
REMOVAL AND INSTALLATION
Pre-removal Operation
Power Steering Fluid DrainingPost-installation Operation
(1) Power Steering Fluid Supplying
(2) Drive Belt Tension Adjusting
(3) Power Steering Fluid Line Bleeding
12
34
56
7
8 9 10
Unit: Nm {kgf
m}
22 {2.2}
11
22 {2.2}
52 {5.3}24 {2.4} 12 {1.2}
18 {1.8}
Removal steps
1. Drive belt
2. Suction hose
3. Pully
4. Pressure hose
5. O-ring
6. Heat protector A7. Heat protector B
8. Pressure switch connector
9. Bolt
10. Bolt
11. Oil pump assembly

STEERING – Power Steering Fluid Cooler37A-9
POWER STEERING FLUID COOLER
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
(1) Power Steering Fluid Draining and Refilling
(2) Front Bumper Removal and Installation
(Refer to GROUP 51.)
1
2
Unit: Nm {kgf
m}
12 {1.2}
13 {1.3}
Removal steps
1. Cooler hose
2. Power steering fluid cooler