1900 MITSUBISHI DIAMANTE power steering fluid

SUSPENSION AND STEERING 8-37
19-28 Nm
14-20 klbs.
/
12-18 Nm
9- 13 ft.lbs.
2rd
,
1. Feed tube
2. O-ring
3. Rear oil pump
4. O-ring
93158ga:
Exploded view of the rear power steering pump-1990-93 Galant
6. Disconnect the pressure and suction hoses
from the fittings on the pump.
7. The large mounting bolts that hold the differ-
ential carrier support plate to the underbody may use
self-locking nuts. Before removing them, support the
rear axle assembly in the middle with a transaxle
jack. Remove the nuts, then remove the support
plate(s) and the square dynamic damper from the rear
of the carrier.
8. Lower the differential carrier
and remove from
the vehicle.
9. Remove the pump retaining bolt and remove
the pump from the rear differential assembly.
To install: IO. Install the pump and tighten the mounting
bolt to 14-20 ft. Ibs. (19-28 Nm).
11. Raise the rear differential carrier into position
and install support member bolts. Replace all self-
locking nuts. Tighten all mounting nuts and bolts as
follows:
l Upper support plate to carrier bolts: 72-87
ft. Ibs. (100-120 Nm)
l Support member/dynamic damper to car-
rier bolts: 58-72 ft. Ibs. (80-100 Nm)
l Differential support member mounting bolt
nuts: 80-94 ft. Ibs. (110-130 Nm)
12. Connect the pressure and suction lines to the
pump.
13. Install new circlips on both rear driveshafts
and install. I
14.
Install the propeller shaft and tighten the
mounting hardware to 22-25 ft. Ibs. (30-35 Nm).
15. Install the center exhaust pipe and muffler.
1
16. Lower the vehicle. With the vehicle level, fill
the rear differential.
17. Fill the power steering system and properly
bleed.
1994-00 Galant
2.4L ENGINE
1. Disconnect the battery negative cable.
2. Loosen and remove the power steering pump
drive belt.
3. Remove the pressure switch connector from
the side of the pump.
*If the alternator is located under the oil
pump, cover it with a shop towel to protect it
frqm oil.
4. Disconnect the return fluid line. Remove the
reservoir cap and allow the return line to drain the
fluid from the reservoir. If the fluid is contaminated,
disconnect the ignition high tension cable and crank
the engine several times to drain the fluid from the
gearbox.
5. Disconnect the pressure line.
6. Unbolt and remove the pump from the
mounting bracket.
To install: 7. Install the pump, wrap the belt around the
pulley and lightly tighten the mounting bolts.
8. Replace the O-rings and connect the pressure
line. Connect the pressure line so the notch in the fit-
ting aligns and contacts the pump’s guide bracket.
Tighten the fitting to 13 ft. Ibs. (18 Nm).
9. Connect the return line and secure with the
clamp.
IO. Attach the pressure switch connector.
<2.4L ENGINE> 12 N-m 12 N-m
<3.OL ENGINE>
32 ft-lb
1. DRIVE BELT
2. PRESSURE SWITCH CONNECTOR
3. SUCTION HOSE
; i’;;‘;;RE HOSE 7. BOLT
8. ~O~~~E;TEER’NG PUMP
9. OIL PUMP
10. OIL PUMP BRACKET
6. BOLT
93158gal
Exploded view of the power steering pump-1994-00 Galant with 2.4L engine

- 8-38 SUSPENSION AND STEERING
11. Adjust the power steering belt for proper ten-
sion and tighten the adjusting bolts.
12. Reconnect the negative battery cable.
13. Refill the reservoir and bleed the system.
3. Of EIJGINE
1. Disconnect the battery negative cable. 2. Disconnect the return fluid line. Remove the
reservoir cap and allow the return line to drain the
fluid from the reservoir. If the fluid is contaminated,
disconnect the ignition high tension cable and crank
the engine several times to drain the fluid from the
gear box.
3. Remove the power steering pump drive belt.
4. Remove the pressure switch connector from
the side of the pump.
5. If the alternator is located under the oil pump,
cover it with a shop towel to protect it from oil.
6. Disconnect the high pressure hose and the
return hose from the pump.
7. Remove the pump drive belt and unbolt the
pump from its bracket and remove the pump.
To install: 8. Install the pump, *rap the belt around the
pulley and tighten the bolts that secure the pump to
17 ft. Ibs. (24 Nm).
9. Replace the O-rings and connect the high
pressure hose. Connect the pressure line so the
notch in the fitting aligns and contacts the pump’s
guide bracket. Tighten the mounting nut with lock-
washer to 17 ft. Ibs. (24 Nm).
IO. Using a new hose clamp, connect the return
line.
11. Attach the pressure switch connector.
12. Adjust the belt tension and tighten the
adjust- ing bolts.
13. Refill the reservoir and bleed the system.
Diamante *
FRONT
. 1. Disconnect the battery negative cable. 2. Disconnect the return fluid line. Remove the
reservoir cap and allow the return line to drain the
fluid from the reservoir. If the fluid is contaminated,
disconnect the ignition high tension cable and crank
the engine several times to drain the fluid from the
gearbox.
3. Remove the power steering pump drive belt.
4. Remove the pressure switch connector from
the side of the pump.
5. If the alternator is located under the oil pump,
cover it with a shop towel to protect it from oil.
6. Disconnect the high pressure hose and the
return hose from the pump.
7. Remove the pump drive belt and unbolt the
pump from its bracket and remove the pump.
To install: 8. Install the pump, wrap the belt around the
pulley and tighten the bolts that secure the pump to
17 ft. Ibs. (24 Nm).
9. Replace the O-rings and connect the high
pressure hose. Connect the pressure line so the
notch in the fitting aligns and contacts the pump’s
guide bracket. Tighten the mounting nut with lock-
washer to 17 ft. Ibs. (24 Nm).
10. Using a new hose clamp, connect the return
line.
Il. Attach the pressure switch connector.
12. Adjust the belt tension and tighten the adjust-
ing bolts.
13. Refill the reservoir and bleed the system.
REAR
1. Disconnect the negative battery cable.
2. Drain the power steering fluid.
3. Remove the rear power steering pump heat
protector, located on the engine side of the differen-
tial on the transaxle.
4. Disconnect the pressure line from the pump.
5. Disconnect the suction hose from the pump.
6. Remove the mounting bolts and remove the
pump from the transaxle.
44
33
REMOVAL STEPS
5. POWER STEERING PUMP
BRACKET STAY
6. OIL PUMP 1. DRIVE-BELT
2. SUCTION HOSE I ’ 3. PRESSURE HOSE
4. PRESSURE SWITCH
CONNECTOR
Exploded view of the power steering pump-Diamante
. 93158ga5
7. The installation is the reverse of the removal
procedure. Tighten the mounting bolts to 17 ft. Ibs.
(24 Nm).
8. Refill the reservoir and bleed the system.
Extreme caution should be taken when test-
ing the rear steering pump. Ensure that the
vehicle is supported safely and that all com-
ponents are torqued to specification prior be
testing.
. SYSTEM BLEEDING
,Front
1. Raise the vehicle and support safely.
2. Manually turn the pump pulley a few times.
3. Turn the steering wheel all the way to the left
and to the right 5 or 6 times.
4. Disconnect the ignition high tension cable
and, while operating the starter motor intermittently,
turn the steering wheel all the way to the letI and right
5-6 times for 15-20 seconds. During bleeding,
make sure the fluid in the reservoir never falls below
the lower position of the filter. If bleeding is at-
tempted with the engine running, the air will be ab-
sorbed in the fluid. Bleed only while cranking.
5. Connect ignition high tension cable, start en-
gine and allow to idle.
6. Turn the steering wheel left and right until
there are no air bubbles in the reservoir. Confirm that
the fluid is not milky and the level is up to the speci-
fied position on the gauge. Confirm that there is very
little change in the fluid level when the steering wheel
is turned. If the fluid level changes more than 0.2 in.
(5mm), the air has not been completely bled. Repeat
the process.
Rear
.
1. Bleed the front steering system.
2. Start the engine and let it idle.
3. Loosen the bleeder screw on the left side of the
control valve and install special tool MB991230 to
the bleeder.
4. Turn the steering wheel all the way to the left,
then immediately turn it halfway back. Confirm that
air has discharged with the fluid.
5. Repeat Step 4 two or three times as required,
to remove all air from the rear system. Stop the en-
gine.
6. Loosen the power cylinder (rear steering gear)
bleeder screw about I/* turn and install the same
special tool with the rotation prevention metal fixtures
to prevent the bleeder from opening more.
7. Start the engine and run to 50 mph to circulate
the fluid.
8. Maintain a speed of 20 mph and turn the steer-
ing wheel back and forth. Air should be discharged ,
through the tube of the special tool and into the oil
reservoir.
9. Repeat until all air is removed from the power
cylinder.

9-2 BRAKES
Hydraulic systems are used to actuate the brakes
of all modern automobiles. The system transports the
power required to force the frictional surfaces of the
braking system together from the pedal to the indi-
vidual brake units at each wheel. A hydraulic system
is used for two reasons.
First, fluid under pressure can be carried to all
parts of an automobile by small pipes and flexible
hoses without taking up a significant amount of room
or posing routing problems.
Second, a great mechanical advantage can be
given to the brake pedal end of the system, and the
foot pressure required to actuate the brakes can be
reduced by making the surface area of the master
cylinder pistons smaller than that of any of the pis-
tons in the wheel cylinders or calipers.
The master cylinder consists of a fluid reservoir
along with a double cylinder and piston assembly.
Double type master cylinders are designed to sepa-
rate the front and rear braking systems hydraulically
in case of a leak. The master cylinder converts me-
chanical motion from the pedal into hydraulic pres-
sure within the lines. This pressure is translated back
into mechanical motion at the wheels by either the
wheel cylinder (drum brakes) or the caliper (disc
brakes).
Steel lines carry the brake fluid to a point on the
vehicle’s frame near each of the vehicle’s wheels. The
fluid is then carried to the calipers and wheel cylin-
ders by flexible tubes in order to allow for suspen-
sion and steering movements.
In drum brake systems, each wheel cylinder con-
tains two pistons, one at either end, which push out-
ward in opposite directions and force the brake shoe
into contact with the drum.
In disc brake systems, the cylinders are part of the
calipers. At least one cylinder in each caliper is used
to force the brake pads against the disc.
All pistons employ some type of seal, usually
made of rubber, to minimize fluid leakage. A rubber
dust boot seals the outer end of the cylinder against
dust and dirt. The boot fits around the outer end of
the piston on disc brake calipers, and around the
brake actuating rod on wheel cylinders.
The hydraulic system operates as follows: When at
rest, the entire system, from the piston(s) in the mas-
ter cylinder to those in the wheel cylinders or
calipers, is full of brake fluid. Upon application of the
brake pedal, fluid trapped in front of the master cylin-
der piston(s) is forced through the lines to the wheel
cylinders. Here, it forces the pistons outward, in the
case of drum brakes, and inward toward the disc, in
the case of disc brakes. The motion of the pistons is
opposed by return springs mounted outside the
cylinders in drum brakes, and by spring seals, in disc
brakes.
Upon release of the brake pedal, a spring located
inside the master cylinder immediately returns the
master cylinder pistons to the normal position. The
pistons contain check valves and the master cylinder
I
has compensating ports drilled in it. These are un-
covered as the pistons reach their normal position.
The piston check valves allow fluid to flow toward the
wheel cylinders or calipers as the pistons withdraw.
Then, as the return springs force the brake pads or
shoes into the released position, the excess fluid
reservoir through the compensating ports. It is during the time the pedal is in the released position that any
fluid that has leaked out of the system will be re-
placed through the compensating ports.
Dual circuit master cylinders employ two pistons,
located one behind the other, in the same cylinder.
The primary piston is actuated directly by mechanical
linkage from the brake pedal through the power
booster. The secondary piston is actuated by fluid
trapped between the two pistons. If a leak develops in
front of the secondary piston, it moves forward until it
bottoms against the front of the master cylinder, and
the fluid trapped between the pistons will operate the
rear brakes. If the rear brakes develop a leak, the pri-
mary piston will move forward until direct contact
with the secondary piston takes place, and it will
force the secondary piston to actuate the front brakes.
In either case, the brake pedal moves farther when the
brakes are applied, and less braking power is avail-
able.
All dual circuit systems use a switch to warn the
driver when only half of the brake system is opera-
tional. This switch is usually located in a valve body
which is mounted on the firewall or the frame below
the master cylinder. A hydraulic piston receives pres-
sure from both circuits, each circuits pressure being
applied to one end of the piston. When the pressures
are in balance, the piston remains stationary. When
one circuit has a leak, however, the greater pressure
in that circuit during application of the brakes will
push the piston to one side, closing the switch and
activating the brake warning light.
In disc brake systems, this valve body also con-
tains a metering valve and, in some cases, a propor-
tioning valve. The metering valve keeps pressure
from traveling to the disc brakes on the front wheels
until the brake shoes on the rear wheels have con-
tacted the drums, ensuring that the front brakes will
never be used alone. The proportioning valve con-
trols the pressure to the rear brakes to lessen the
chance of rear wheel lock-up during very hard brak-
ing.
Warning lights may be tested by depressing the
brake pedal and holding it while opening one of the
wheel cylinder bleeder screws. If this does not cause
the light to go on, substitute a new lamp, make conti-
nuity checks, and, finally, replace the switch as nec-
essary.
The hydraulic system may
be checked for leaks by applying pressure to the pedal gradually and steadily.
If the pedal sinks very slowly to the floor, the system
has a leak. This is not to be confused with a springy
or spongy feel due to the compression of air within
the lines. If the system leaks, there will be a gradual
change in the position of the pedal with a constant
pressure.
Check for leaks along all lines and at wheel cylin-
ders. If no external leaks are apparent, the problem is
inside the master cylinder,
DISC BRAKES
Instead of the traditional expanding brakes that
press outward against a circular drum, disc brake
systems utilize a disc (rotor) with brake pads posi-
tioned on either side of it. An easily-seen analogy is
the hand brake arrangement on a bicycle. The pads
squeeze onto the rim of the bike wheel, slowing its
motion. Automobile disc brakes use the identical principle but apply the braking effort to a separate
disc instead of the wheel.
The disc (rotor) is a casting, usually equipped with
cooling fins between the two braking surfaces. This
enables air to circulate between the braking surfaces
making them less sensitive to heat buildup and more
resistant to fade. Dirt and water do not drastically af-
fect braking action since contaminants are thrown off
by the centrifugal action of the rotor or scraped off
the by the pads. Also, the equal clamping action of
the two brake pads tends to ensure uniform, straight
line stops. Disc brakes are inherently self-adjusting.
There are three general types of disc brake:
1. A fixed caliper.
2. A floating caliper.
3. A sliding caliper.
The fixed caliper design uses two pistons
mounted on either side of the rotor (in each side of
the caliper). The caliper is mounted rigidly and does
not move.
The sliding and floating designs are quite similar.
In fact, these two types are often lumped together. In
both designs, the pad on the inside of the rotor is
moved into contact with the rotor by hydraulic force.
The caliper, which is not held in a fixed position,
moves slightly, bringing the outside pad into contact
with the rotor. There are various methods of attaching
floating calipers. Some pivot at the bottom or top,
and some slide on mounting bolts. In any event, the
end result is the same.
DRUM BRAKES
Drum brakes employ two brake shoes mounted on
a stationary backing plate. These shoes are posi-
tioned inside a circular drum which rotates with the
wheel assembly. The shoes are held in place by
springs. This allows them to slide toward the drums
(when they are applied) while keeping the linings and
drums in alignment. The shoes are actuated by a
wheel cylinder which is mounted at the top of the
backing plate. When the brakes are applied, hydraulic
pressure forces the wheel cylinder’s actuating links
outward. Since these links bear directly against the
top of the brake shoes, the tops of the shoes are then
forced against the inner side of the drum. This action
forces the bottoms of the two shoes to contact the
brake drum by rotating the entire assembly slightly
(known as servo action). When pressure within the
wheel cylinder is relaxed, return springs pull the
shoes back away from the drum.
Most modern drum brakes are designed to self-
adjust themselves during application when the vehi-
cle is moving in reverse. This motion causes both
shoes to rotate very slightly with the drum, rocking
an adjusting lever, thereby causing rotation of the ad-
justing screw. Some drum brake systems are de-
signed to self-adjust during application whenever the
brakes are applied. This on-board adjustment system
reduces the need for maintenance adjustments and
keeps both the brake function and pedal feel satisfac-
tory.
POWER BOOSTERS
Virtually all modern vehicles use a vacuum as-
sisted power brake system to multiply the braking
force and reduce pedal effort. Since vacuum is always
available when the engine is operating, the system is

l
II-24 MASTER INDEX
ADJUSTMENT 8-25
REMOVAL &INSTALLATION 8-25
HYDRAULIC CONTROL UNIT 9-25
REMOVAL & INSTALLATION 9-25
IDLE AIR CONTROLMOTOR 4-9
OPERATION 4-9
REMOVAL&INSTALLATION 4-9
TESTING 4-9
IDLESPEED 1-28
PREVENTIVEMAINTENANCE 1-28
SYSTEM INSPECTION 1-29
SYSTEMSERVlCE&REPAlR 1-28
IGNITION LOCK CYLINDER 8-29
REMOVAL & INSTALLATION 8-29
IGNITION SWITCH 8-30
REMOVAL & INSTALLATION 8-30
IGNITION COIL(s) 2-5
REMOVAL&INSTALLATION 2-6
TESTING . 2-5
IGNITION COIL 2-3
REMOVAL&INSTALLATION 2-3
TESTING 2-3
IGNITION TIMING l-25
GENERALINFORAMTION l-25
INSPECTION&ADJUSTMENT l-26
INSIDE REAR VIEW MIRROR
IO-IO
REPLACEMENT IO-IO
INSPECTION 3-55
REPLACEMENT 3-56
INSTRUMENT CLUSTER 6-17
REMOVAL&INSTALLATION 6-I;
INSTRUMENTPANEL IO-6
REMOVAL &INSTALLATION IO-6
INSTRUMENTS AND SWITCHES 6-17
INTAKE MANIFOLD 3-7
REMOVAL &INSTALLATION 3-7
INTAKEAIRTEMPERATURESENSOR 4-10
OPERATION 4-10
REMOVAL&INSTALLATION 4-11
TESTING 4-11
INTERIOR 1 O-6
JACKING I-46
. JACKING PRECAUTIONS 1-47
JUMP STARTING A DEAD BATTERY 1-44
JUMPSTARTING PRECAUTIONS l-45
JUMPSTARTING PROCEDURE l-45
KNUCKLE,HUB, AND BEARING 8-13
REMOVAL &INSTALLATION 8-13
LIGHTING 6-19
LOWER BALLJOINT 8-10
INSPECTION 8-10
REMOVAL & INSTALLATION 8-10
LOWER CONTROLARM 8-10
REMOVAL&INSTALLATION 8-10
LOWER CONTROL ARMS 8-23
REMOVAL & INSTALLATION 8-23
MACPHERSONSTRUTAND COILSPRING
8-7
OVERHAUL 8-7
REMOVAL & INSTALLATION 8-7
MAINTENANCEORREPAIR? l-2
MANIFOLDABSOLUTEPRESSURESENSOR
4-12
OPERATION 4-12
REMOVAL&INSTALLATION 4-13
TESTING 4-12
MANUAL RACK AND PINION STEERING GEAR
8-31
REMOVAL & INSTALLATION 8-31
MANUALTRANSAXLEASSEMBLY 7-2
REMOVAL & INSTALLATION. 7-2
MANUAL TRANSAXLE 7-2 MANUALTRANSAXLE l-35
DRAIN &REFILL l-36
FLUID RECOMMENDATIONS l-35
LEVEL CHECK l-35
MASSAIRFLOWSENSOR 4-11
OPERATION 4-11
REMOVAL&INSTALLATION 4-11
TESTING 4-11
MASTER CYLINDER 9-3
BRAKE PEDALADJUSTMENTS 9-4
REMOVAL & INSTALLATION 9-3
MULTI-POINT FUEL INJECTION SYSTEM (MPI) 5-3
DBD-1 TROUBLE CODES 4-26
OBD-II TROUBLE CODES 4-27
OIL PAN 3-30
REMOVAL & INSTALLATION 3-30
OIL PUMP 3-33
REMOVAL & INSTALLATION 3-33
OIL PRESSURESENDING UNIT 2-12@T
REMOVAL&INSTALLATION 2-1.2
TESTING 2-12
OUTSIDE MIRRORS IO-3
REMOVAL&INSTALLATION IO-3
OXYGENSENSOR 4-8
OPERATION 4-8
REMOVAL&INSTALLATION 4-8
TESTING 4-8
PARK/NEUTRAL POSITIONSWITCH 7-10
ADJUSTMENT 7-10
REMOVAL & INSTALLATION 7-10
PARKING BRAKE 9-20
PCVVALVE l-15
REMOVAL&INSTALLATION I-15
PINION SEAL 7-16
REMOVAL &INSTALLATION 7-16
POWER BRAKEBOOSTER 9-5
REMOVAL &INSTALLATION 9-5
POWER RACK AND PINION STEERING GEAR 8-32
REMOVAL &INSTALLATION 8-32
POWERSEATMOTOR IO-11
REMOVAL & INSTALLATION IO-11
POWER STEERING PUMP 8-34
REMOVAL & INSTALLATION 8-34
SYSTEM BLEEDING 8-36
POWER TRANSlSTOR(IGNITION MODULE) 2-7
REMOVAL&INSTALLATION 2-7
POWERSTEERING PUMP l-42
FLUID RECOMMENDATIONS l-42
LEVELCHECK l-42
POWER TRANSlSTOR(Ignition Module) 2-4
REMOVAL&INSTALLATION 2-4
PRESSURERELIEFVALVE 5-9
REMOVAL&INSTALLATION 5-9
PROPORTIONING VALVE 9-6
REMOVAL & INSTALLATION 9-6 *
RADIATOR 3-18
REMOVAL &INSTALLATION 3-18
RADIO RECEIVER/AMPLIFIER/TAPE PLAYER/CD PLAYER 6-14
READING CODES 4-26
WITHASCANTOOL 4-26
WITHOUTASCANTOOL 4-27
READING CODES 4-27
WITHASCANTOOL 4-27
WITHOUTASCANTOOL 4-27
REAR AXLE DIFFERENTIAL 7-15
REAR HALFSHAFTAND SEAL 7-15
REMOVAL&INSTALLATION 7-15
REAR MAIN SEAL 3-54
REMOVAL & INSTALLATION 3-54