SsangYong Korando III (2010 year). Service manual — part 558
13-6
1. SYSTEM DESCRIPTION
The power steering has been designed to make the wheel move more easily than in a manual steering
system. The hydraulic power assists the process utilizing hydraulic fluid. The fluid increases pressure in
the power steering pump and aids the movement of the steering mechanism.
The power steering system consists of pump, oil reservoir, rack and gear box.
The power steering pump is a vane type and delivers hydraulic pressure to operate the power steering
system.
The pressure relief valve in the pump controls the discharging pressure.
The rotary valve in the rack and the pinion gear directs the oil from the power steering pump to one side
of the rack piston. The integrated rack piston converts the hydraulic pressure to linear movement. The
operating force of the rack moves the wheels through the tie rod, the tie rod end and the steering knuckle.
Even though the hydraulic pressure cannot be generated, a driver can steer the vehicle without power
assist but it needs very high steering force.
In this case, the operating force of the steering wheel is conveyed to the pinion, and the movement of the
pinion moves the rack through the pinion gear combined to the rack gear.
13-7
0000-00
Installation of steering
gear box and pipe
Installation of reservoir and hose
Installation of power steering pump
and pipe
2. SYSTEM LAYOUT
The steering pump is driven by the engine power through a belt. This pump circulates the power steering
oil from the reservoir -> steering pump -> oil supply pipe -> steering gear box -> oil return pipe ->
reservoir to perform steering operations.
Return pipe
Supply pipe
14-3
4610-00
1. SPECIFICATION
Unit
Description
Specification
System operation
Operating type
Motor driven power steering system
Operating temperature
- 40°C to 80°C
Rated voltage
12 V
Rated current
85 A
Operating voltage
Network
8 to 16 V
C-EPS ECU
8 to 16 V
Full Performance
10 to 16 V
Motor
Type
3-Phase BLAC (Brushless AC)
Rated current/voltage
85 A / 12 V (at idle 0.5 A)
Position sensor type
Hall sensor type
Torque & angle sensor
Type
Non-contact type
Steering column
Operating type
Manual tilting & telescoping
Lower shaft
Type
Sliding (Ball slip) type
Steering gear
Gear ratio
50.7 mm/rev
Rack stroke
145 mm
Maximum steering angle
Inner wheel
38.62°
Outer wheel
31.07°
14-4
2. TIGHTENING TORQUE
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