wheel SSANGYONG NEW ACTYON SPORTS 2012 Manual Online

11-234890-10
4) RISE (ESP is working) Mode
The shuttle valve and inlet valve will be open and the separation valve and outlet valve will be
closed. Then, the pump is operated. When ESP operates while the ABS is operating, the
pressure will be increased continuously until just before the corresponding wheel gets locked.

11-24
5) Hydraulic Circuit of HBA
The above figure shows one front and one rear wheel and the same hydraulic circuit forms as in
the ESP operation. When HECU recognizes that it is an emergency and it is required for hard
braking, depending on the pressure value of the brake pressure sensor and pressure changes
caused by the pressure sensor timing, it operates the pump immediately to apply the brake
pressure at the wheels. Then, the pressure in the pump increases until just before the
corresponding wheel gets locked. The motor still keeps rotating and the outlet valve and the
separation valve will stay closed. When the wheel starts to lock, the HBA function cancels and
switches to ABS operation.

12-34610-01
1. SPECIFICATIONS
Description Specification
Steering wheel Type 4-spoke type
Gear box Type Rack and pinion type
Gear ratio 40.245
Steering angle Inner37.59˚
Outer33.48˚
Oil pump Type Vane type
Maximum pressure (kgf/cm2)90 ± 3
Pulley size (mm)Ø115
Operating temperature-40℃~150℃
Minimum turning radius (m) 5.95
Steering oil Type ATF Dexron II or III
TOTAL FLUIDE DA
(Extreme cold condition only)
Capacity (L) Approx. 1.0
Service interval Daily check and add if necessary.

12-4
2. SYSTEM LAYOUT
1) Steering Wheel and Column
Body assembly - steering wheel
Damper - steering wheel
Screw
Lid
Bolt
Column & shaft assembly - tilt
Shaft assembly - lower
Nut (39.2~58.5 Nm) 1.
2.
3.
4.
5.
6.
7.
8.Washer
Bolt (19.6~24.5 Nm)
Bolt (19.6~24.5 Nm)
Nut
Bolt - joint (17.6~24.5 Nm)
Washer
Blanking cover - cruise switch 9.
10.
11.
12.
13.
14.
15.

12-74610-01
3. TROUBLESHOOTING
Problem Possible Cause Action
Movements of steering
feels heavyUnregular wear or binding of steering ball joint
due to lack of lubrication or foreign material
insertionLubricate or replace
Damaged or defective steering gear Replace the steering
gear assembly
Incorrect steering pinion preload Adjust
Defective steering shaft joint Replace
leakage of steering fluid Repair or replace
Insuffcient steering fluid or air insertion Fill up fluid or bleed air
Defective steering oil pump Replace
Damaged or loosened pump drive belt Adjust or replace
Clogging of fluid line Repair or replace
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace
Steering wheel pulls to
one sideDamaged steering linkage Replace
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace
Defective brake system Repair or replace
Excessive free play of
steering wheelWorn steering gear Replace the steering
gear assembly
Worn or damaged steering ball joint Replace
Looseness of steering gear box Retighten
Poor returning of
steering wheelBroken or binding of steering ball joint Replace
Improper correct steering pinion preload Replace the steering
gear assembly
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace

12-8
Problem Possible Cause Action
Excessive vibration of
steering wheel
(shimming)Broken steering linkage Replace
Looseness of steering gear box Retighten
Broken or binding of steering ball joint Replace
Worn or damaged front wheel bearing Replace
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace
Abnormal noise from
steering systemLooseness of steering gear box Retighten
Defective steering gear Replace the gear
assembly
Interference between steering column and
partsRepair
Looseness of steering linkage Retighten
Loosened or damaged oil pump drive belt Adjust or replace
Looseness of oil pump bracket Replace
Looseness of oil pump Replace
Air insertion into system Bleed air
Defective oil pump Replace
Abnormal noise when
turning steering wheelLooseness of steering column Retighten
Worn or damaged steering shaft bearing Replace the steering
column
Looseness of intermediate shaft Retighten
Too heavy steering wheel Worn or damaged steering shaft bearing Replace the steering
column

12-94610-01
Adjusting plug
Gear Preload Check ▶
Preload is the term used in mechanical engineering to describe the load applied to a fastener
merely as a result of being fastened (and before any external loads are applied)
4. INSPECTION AND MAINTENANCE
Place the wheels at straight ahead
direction.
Lift up the vehicle with a lift.
Unscrew the adjusting plug lock nut.
Measure the torque of the adjusting plug. 1.
2.
3.
4.
If the torque is excessive or too low, adjust
to the specified torque. 5.
Place the rack gear to the center
position.
Tighten the adjusting plug to 10.2 Nm.
Turn the pinion gear so that the rack
gear is turned to lock to lock 5 times.
Unscrew the adjusting plug.
Tighten the adjusting plug to 4.6 to 5.6
Nm.
Unscrew the adjusting plug to 67.5°. -
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Lock nut
Adjusting plug
Bushing
Rack support yokeRack support spring
Yoke plugLock nut

12-10
The difference between both sides should
be within 0.6 kg.Park the vehicle on a paved and flat
ground and place the front wheels at
straight ahead direction.
Start the engine and let it run around 1,000
rpm.
Install the spring scale on the
circumference of the steering wheel and
measure the steering effort in both
directions. 1.
2.
3. Steering Effort Check ▶
Steering Angle Check ▶
Place the front wheel on a turning radius
measuring tool.
Turn the steering wheel to the its both
ends and measure the maximum steering
angle. 1.
2.
If the steering angle is out of the specified
value, check and adjust the toe-in.
Steering angleInner37.59˚
Outer33.48˚
Free Play Check ▶
Start the engine and place the wheels at
straight ahead direction.
Turn the steering wheel until the tires starts
to move and measure the distance on the
circumference of the steering wheel. 1.
2.
If the free play is out of the specified
value, check the free play in steering
column shaft connection and steering
linkage. Replace or repair if necessary.
Free play30 mm
Steering effort in
standstillbelow 3.0 kg

12-114610-01
Oil Change ▶
Open the power fluid reservoir cap and
drain the fluid completely with oil suction
device. To make it easy, turn the steering
wheel to its both ends several times.
Fill up the specified fluid into fluid reservoir
and bleed air from the steering system. 1.
2. Oil Level Check ▶
Place the vehicle on a level ground and
start the engine and let it run at idle speed.
Turn the steering wheel several times so
that the oil temperature reaches to normal
operating level (75~85˚C).
Place the steering wheel at straight ahead
direction.
Check the oil level in the power steering oil
reservoir. Adjust the oil level between MAX
and MIN. 1.
2.
3.
4.
If the difference between two
measurements is below 5 mm and the level
is between MAX and MIN level, it's normal.
If it is over 5 mm, bleed air from the
system. Check the fluid level on a level ground with
the engine turned off. The fluid level should
be between the MIN and MAX marks on the
reservoir cap gauge.
below 5 mm
Engine idling Engine running
Oil typeATF Dexron II or III
Capacityapprox. 1ℓ (including
reservoir)

12-12
Air Bleeding ▶
Lift up the vehicle very carefully.
Turn the steering wheel to its both ends
several times and add the oil up to MAX
line in the steering oil reservoir.
Periodically crank the starting motor and
turn the steering wheel to its both ends
without any interruption.
Check the oil level again. If the oil level is
fluctuated, repeat the procedures from
step 3 to step 5.
Start the engine.
Turn the steering wheel to its both ends
until any bubble can be found in the
steering oil reservoir.
Perform the test drive and check the
steering wheel for normal operation and
noise.
If the oil level abruptly goes up, bleed the
air from the system again. 1.
2.
3.
4.
5.
6.
7.
8.
The air bleeding should be done after
servicing the power steering system and when
the difference between two measurements
(cooled and normal temperature) is
prominent.
Max
Min
Normal Abnormal
If the air bleeding is not properly
performed, the life span of the power
steering pump may be shortened. -