Mitsubishi Galant (2004+). Manual — part 1428
ON-VEHICLE SERVICE
TSB Revision
POWER STEERING
37A-21
FLUID LEVEL CHECK
M1372002000303
1. Park the vehicle on a flat, level surface.
2. 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).
3. With the engine running, turn the wheel all the way to the left
and right several times.
4. 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 contains air or
has milky appearance, or the fluid level fluctuate by 5 mm
(0.2 inch) or more, power steering system air bleeding
should be done.
FLUID REPLACEMENT
M1372002100366
1. Raise and support the front wheels.
2. Disconnect the return hose connection, and then connect a
vinyl hose to the return hose, and drain the fluid into a
container.
3. Disconnect the ignition coil connectors (refer to GROUP 16,
Ignition Coil
<2.4L ENGINE>,
<3.8L
ENGINE>).
4. While operating the starter motor intermittently, turn the
steering wheel all the way to the left and right several times
to drain all of the fluid.
5. Connect the return hose securely, and then secure with the
clip.
6. Fill the oil reservoir with GENUINE MITSUBISHI POWER
STEERING FLUID up to the lower mark of the reservoir, and
then bleed the air.
ACX01131
WHILE ENGINE
RUNNING
AC
FLUID LEVEL CHANGE:WITHIN 5 mm (0.2 in)
WHILE ENGINE
STOPPED
AC206743
RETURN
HOSE
VINYL HOSE
AB
ON-VEHICLE SERVICE
TSB Revision
POWER STEERING
37A-22
POWER STEERING SYSTEM AIR BLEEDING
M1372002200352
Perform air bleeding procedure as necessary after replacing
the steering gear, oil pump or the steering fluid lines.
1. Raise and support the front wheels.
2. Disconnect the ignition coil connectors (Refer to GROUP 16,
Ignition Coil
<2.4L ENGINE>,
<3.8L
ENGINE>).
CAUTION
Perform air bleeding only while cranking the engine. Do
not perform air bleeding while the engine is running. If you
do so, air in the fluid will be increased and air bleeding will
become more difficult. During air bleeding, refill the steer-
ing fluid so that the level never falls below the lower mark
on the dipstick.
3. Turn the steering wheel all the way to the left and right five
or six times while using the starter motor to crank the engine
intermittently several times (for 15 to 20 seconds).
4. Connect the ignition coil connectors (Refer to GROUP 16,
Ignition Coil
<2.4L ENGINE>,
<3.8L
ENGINE>).
5. Start the engine and allow to idle.
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
between the high and low dipstick marks.
8. Confirm that there is very little change in the fluid level when
the steering wheel is turned left and right.
CAUTION
If the fluid level rises suddenly after the engine is stopped,
the air has not been completely bled. If air bleeding is not
complete, there will be abnormal noises from the pump
and the flow-control valve, and this condition could reduce
the life of the power steering components.
9. Confirm that the change in the fluid level is no more than 5
mm (0.2 inch) when the engine is stopped.
10.If the change of the fluid level is 5 mm (0.2 inch) or more,
the air has not been completely bled from the system. The
air bleeding procedure must be repeated.
ACX01131
WHILE ENGINE
RUNNING
AC
FLUID LEVEL CHANGE:WITHIN 5 mm (0.2 in)
WHILE ENGINE
STOPPED
ON-VEHICLE SERVICE
TSB Revision
POWER STEERING
37A-23
OIL PUMP PRESSURE TEST
M1372002300337
Required Special Tools:
• MB990662: Power Steering Oil Pressure Gauge
• MB991548: Power Steering Oil Pressure Gauge Adapter
(Pump Side)
• MB991549: Power Steering Oil Pressure Gauge Adapter
(Hose Side)
1. Disconnect the pressure hose from the oil pump, and then
connect special tools MB991548, MB990662 and
MB991549.
2. Bleed air, then turn the steering wheel several times while
the vehicle is not moving so that the temperature of the fluid
rises to approximately 50
− 60°C (122 − 140°F).
3. Start the engine and idle it.
CAUTION
The pressure gauge shut-off valve must not remain closed
for more than 10 seconds.
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. Open it again immediately
after checking the pressure.
Standard value:
2.4L engine: 8.3
− 8.8 MPa (1,204 − 1,276 psi)
3.8L engine: 9.3
− 9.8 MPa (1,349 − 1,421 psi)
5. If it is not within the standard value, replace the oil pump.
6. 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 (116 − 145 psi)
7. If it is not within the standard value, the probable cause is a
malfunction of the oil line or steering gear, so check these
parts and repair as necessary.
8. Turn the steering wheel all the way to the left or right; then
check the retention hydraulic pressure.
Standard value:
2.4L engine: 8.3
− 8.8 MPa (1,204 − 1,276 psi)
3.8L engine: 9.3
− 9.8 MPa (1,349 − 1,421 psi)
9. If not the standard value, overhaul or replace the steering
gear. Remeasure fluid pressure.
10. Remove special tools MB991548, MB990662 and
MB991549, connect the pressure hose to the oil pump, and
then tighten the eye bolt to the specified torque.
Tightening torque: 57
± 7 N⋅m (42 ± 5 ft-lb)
11. Bleed the system (Refer to
).
ACX01133
THERMO-
METER
RESERVOIR
ADAPTER
(MB991548)
OIL
PUMP
ADAPTER
(MB991549)
AB
SHUT-OFF VALVE
(FULLY CLOSED)
PRESSURE
GAUGE
(MB990662)
ON-VEHICLE SERVICE
TSB Revision
POWER STEERING
37A-24
POWER STEERING PRESSURE SWITCH CHECK
M1372007200346
Required Special Tools:
• MB990662: Power Steering Oil Pressure Gauge
• MB991548: Power Steering Oil Pressure Gauge Adapter
(Pump Side)
• MB991549: Power Steering Oil Pressure Gauge Adapter
(Hose Side)
1. Disconnect the pressure hose from the oil pump, and then
connect the special tools MB991548, MB990662 and
MB991549.
2. Bleed air, and then turn the steering wheel several times
while the vehicle is not moving so that the temperature of
the fluid rises to approximately 50
− 60°C (122 − 140°F).
3. The engine should be idling.
4. Disconnect the connector for the oil pressure switch, and
place an ohmmeter at the switch.
5. 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: 1.8
− 2.4 MPa (261 − 348 psi)
6. Gradually open the shut-off valve and reduce the hydraulic
pressure; then check whether or not the hydraulic pressure
that deactivates the switch is the standard value.
Standard value: 0.8
− 2.4 MPa (116 − 348 psi)
7. Remove special tools MB991548, MB990662 and
MB991549, connect the pressure hose to the oil pump, and
then tighten the eye bolt to the specified torque.
Tightening torque: 57
± 7 N⋅m (42 ± 5 ft-lb)
8. Bleed the system. (Refer to
TIE ROD END BALL JOINT DUST COVER CHECK
M1372008600284
1. Press the dust cover with your finger to check whether the
dust cover is cracked or damaged.
2. If the dust cover is cracked or damaged, replace the tie rod
end.
NOTE: If the dust cover is cracked or damaged, the ball joint
could be damaged.
ACX01134 AB
THERMO-
METER
ADAPTER
(MB991548)
RESERVOIR
OIL
PUMP
ADAPTER
(MB991549)
SHUT-OFF
VALVE
PRESSURE
GAUGE
(MB990662)
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