SsangYong Actyon Sports II. Service manual - part 163

12-20

Measure the oil pressure with the gauge valve 

fully open.

7.

Pressure at no load

3 to 5 bar

If the pump pressure is in specified range, the 

pump is normal. If not, replace the power 

steering pump

8.

Turn the steering wheel right or left until it 

stops with the engine idling and valve fully 

open.

9.

Oil pressure

78 to 83 bar

To prevent the internal damage, do not close 

the gauge valve for over 10 seconds.

Keep the oil temperature at proper range.

- 

-

12-21

4610-01

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.

12-22

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 hose & tube

Steering pump & 

reservoir

High pressure hose

Linkage gear box

Steering wheel

Lower shaft

Column & shaft

Return hose & tube

Steering pump & 

reservoir

High pressure hose

Linkage gear box

Steering wheel

Lower shaft

Column & shaft

HPS model

SSPS model

12-23

4610-01

Oil Flows during Right Turn

▶

Steering pump

To piston pipe

in

From piston pipe

Piston pipe

Piston

Oil reservoir