Geely Emgrand X7. Manual part — 406

7 Steering system . . . . . . . . . . . . 1624

7.1 Warning and precaution . . . . . . . 1624

7.1.1 Warning and precaution. . . . . . . . .. 1624

7.2 Hydraulic boosting steering system. . . ... .1625

7.2.1 Specifications . . . . . . . . . . . ... 1625

7.2.1.1 Fastener specifications . . . . . . . .. 1625

7.2.1.2 General specifications. . . . . . . . .. 1625

7.2.2 Description and operation. . . . . . . ... 1626

7.2.2.1 Description and operation. . . . . . . 1626

7.2.3 System operating principle . . . . . . 1628

7.2.3.1 Hydraulic power gear rack and pinion steering
operating principle. . . . . . . . . . . . ... 1628

7.2.3.2 Power steering pump assembly work principle
. . . . . . . . . . . . . . . . . . . .. 1632

7.2.4 Component position . . . . . . . . . .1633

7.2.4.1 Component position . . . . . . . . .. 1633

7.2.5 Disassemble drawings . . . . . . . ... 1634

7.2.5.1 Part disassembly drawing . . . . . . . 1634

7.2.5.2 Steering gear disassembly drawing. . . .. 1635

7.2.5.3 Power steering pump assembly disassembly
drawing . . . . . . . . . . . . . . . . .1636

7.2.6 Electrical schematic diagram . . . . . ... 1637

7.2.6.1 Electrical schematic diagram . . . . . 1637

7.2.7 Diagnostic information and procedures. . .. 1638

7.2.7.1 Diagnosis descriptions . . . . . . . .. 1638

7.2.7.2 Visual inspection . . . . . . . . . .. 1638

7.2.7.3 Fault symptom table . . . . . . . . . 1639

7.2.8 Dismantle and installation . . . . . . . 1642

7.2.8.1 Drive belt inspection. . . . . . . . . 1642

7.2.8.2 Power steering oil fluid lever inspection 1642

7.2.8.3 Steering hydraulic pressure inspection ... 1643

7.2.8.4 Steering force inspection . . . . . . .. 1645

7.2.8.5 Steering gear tie rod ball head inspection . 1646

7.2.8.6 Power steering oil inlet/outlet pipe
replacement . . . . . . . . . . . . . . .. 1647

7.2.8.7 Power steering system exhaust process. ... 1653

7.2.8.8 Power steering oil inspection . . . . . 1653

7.2.8.9 Power steering pipeline with oil can assembly
replacement . . . . . . . . . . . . . . .. 1654

7.2.8.10 Power steering pump assembly replacement
. . . . . . . . . . . . . . . . . . . .. 1656

7.2.8.11 Replace steering tie rod and ball head .. 1659

7.2.8.12 Power steering gear anti-duct sleeve
replacement . . . . . . . . . . . . . . 1661

7.2.8.13 Power steering gear with tie rod assembly
replacement . . . . . . . . . . . . . . .. 1663

7.3 Steering wheel and steering column . . . 1668

7.3.1 Specifications . . . . . . . . . . . 1668

7.3.1.1 Fastener specifications . . . . . . . . 1668

7.3.2 Description and operation . . . . . . ... 1668

7.3.2.1 Operations and Description . . . . . 1668

7.3.3 Component position . . . . . . . . . 1669

7.3.3.1 Component position . . . . . . . . . 1669

7.3.4 Disassemble drawings . . . . . . . . . 1670

7.3.4.1 Disassemble drawings . . . . . . . . .1670

7.3.5 Diagnostic information and procedures. . .. 1671

7.3.5.1 Diagnosis descriptions . . . . . . . . .1671

7.3.5.2 Visual inspection . . . . . . . . . .. 1671

7.3.5.3 Fault symptom table . . . . . . . . . 1671

7.3.6 Dismantle and installation . . . . . . ... 1673

7.3.6.1 Steering wheel free clearance inspection. . 1673

7.3.6.2 Upper/lower intermediate shaft universal joint
inspection . . . . . . . . . . . . . . . . 1673

7.3.6.3 Steering wheel replacement . . . . . . .1674

7 Steering system

7.1 Warning and precaution

7.1.1 Warning and precaution

Important precaution on anti-corrosion Materials

Warning!

If the power steering system has been repaired, the correct steering fluid level can not be obtained unless the air in
the steering system is not discharged. The air in the fluid may cause pump cavitation noise and may cause power
steering pump damage over a period of time.

Important precaution on power steering hose disconnection

Warning!

Do not start up the vehicle whenever the power steering gear inlet or outlet hose is disconnected. All hose
interfaces must be blocked or covered when disconnecting the hose. Otherwise, pollute or loss the power steering
fluid and damage the system.

Important precaution on steering wheel in the steering limiting position

Warning!

The duration of the steering wheel in the steering limiting position does not exceed 5s; otherwise, the steering
pump may be damaged.

Precautions of correctly using power steering fluid

Warning!

When adding or completely replacing the oil, be sure to use the correct power steering fluid. the hose and sealing
member may be damaged or oil leaks due to the use of incorrect oil.

1624

7.2 Hydraulic boosting steering system

7.2.1 Specifications

7.2.1.1 Fastener specifications

Torque:

Fastener Name

Model

Metric (N·m)

English system

(lb-ft)

Power steering gear fixing device

M14×1.5

125

92.5

Fixing bolt of universal fork

M8

24

17.8

Fixing device of oil can support and body

M6

9

6.7

The power steering pump and the engine are

connected with the bolt.

M10×1.25 50

37

The power steering pump and the engine are

connected with the nut.

M10 50 37

A-shaped hose hoop is fixed by the steering gear dust

cover and the steering gear.

D=70mm -

-

Lengthened shaft and gear shaft fixing device

M8

24

17.8

Pipe column bracket and fixing bolt of beam

M8

25

18.5

The steering column spline dust cover and the front

frame panel are fixed

Fixed nut

M6 9 6.7

Oil return pipe clamp and steering gear fixing nut

M6

9

6.7

Mechanical steering column assembly coupling nut

M8

25

18.5

Cotter Pin

d=2.5;l=30

33

24.4

Oil pump and oil can are connected with the elastic

hoop of the oil tube steel belt.

D=24 - -

Fixture of power steering inlet-outlet oil pipe

assembly

M6 9 6.7

Fixing flat washer of steering gear

M14

-

-

Fixing bolt of steering gear

M14

125

92.5

7.2.1.2 General specifications

Specification

Applications

(Metric) English

system

System pressure difference (direction

adjustment)

490kPa or less

71 psi or less

Idling system pressure (steering maximum)

More than or equal to 8,000kPa

More than or equal to 900psi

Approximate fuel capacity (complete set

power steering system)

0.91 L

4.58 pt

Applications Type Specification

Fluid

Power steering fluid

DEXRONⅢ

1625

7.2.2 Description and operation

7.2.2.1 Description and operation

Warning!

See Important precaution on the steering wheel in steering limiting position in warning precaution.

Warning!

Before disconnecting the mechanical steering column assembly and the power steering gear assembly with the tie
rod, the wheel should be maintained in the forward direction, and the mechanical steering column assembly must
be in the LOCK (lock) position.

After disconnecting the above part, do not move the front wheel tire and the wheel; otherwise, it will cause that
certain parts are wrongly positioned in the process of installation and the airbag spiral coil in the mechanical
steering column assembly deviates from the center to damage the airbag spiral coil.

Description of power steering pump assembly

The power steering pump assembly is a component served as a vane-type pump that provides the working
hydraulic pressure to the whole power steering system.

The power steering pump assembly consists of the following components:

– Pump

housing

– Vane

pump

rotor

–

Blade of vane pump

–

Front side plate of vane pump

– Vane

pump

shaft

–

Vane pump shaft bearing

– Oil pressure switch assembly

–

Flow control valve assembly

– Suction

pipe

Oil seal and O-ring

The following parts are installed in the pump housing side hole:

– Suction

pipe

– Oil pressure switch assembly

–

Flow control valve assembly

The flow control valve assembly consists of the following parts:

– Oil

outlet

connector

– Flow

control

valve

–

Flow control valve pressure spring

The flow control valve hole and the oil outlet interface are integrated. The flow control valve plays the main role
in preventing the excessive pressure of the steering pump.

Description of power steering gear assembly with tie rod

The power steering gear assembly with tie rod adopts hydraulic power rack and pinion steering gear. When
turning the steering wheel, the motion of the steering wheel is transferred to the steering control valve shaft, and
the gear rack on the steering control valve shaft is engaged, so that the rack moves left and right.

1626