Lifan 620. Manual — part 29

I. Fault Diagnosis of Steering System

1. Note for inspection
(1) Take extra care while replacing the components. Incorrect operation may affect the
performance of the steering system and lead to driving accident.
(2) Notes for SRS system. This vehicle is equipped with SRS, like driver air bag and front
passenger air bag. If failing to repair the air bag in correct order, the unexpected deployment of air
bag during the maintenance may lead to serious accident. Read the notes for supplement restraint
system before maintenance (including removal or installation, and check or replacement of
components).

types.

Over loaded or uneven loaded.

Adjust the load.

Improperly toe adjustment.

Adjust it if necessary.

Broken front suspension components.

Install new front suspension components if

necessary.

The vehicle leans

to one side when

running on

smooth road

surface.

Broken rear suspension components.

Install new rear suspension components if

necessary.

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Table 2-3 (Continued 1)

Fault Possible

Cause

Actions

In case of a vehicle speed below 50 km/h

(30mph), turn the transmission to

NEUTRAL, and turn the ignition switch to

position I (engine OFF-sliding). In case that

the vehicle does not lean to one side when

stopping, install a new steering gear.

In case that the vehicle does not move

Unaligned steering column or the

protecting hood rubs the steering wheel.

Align the steering column.

Blocked steering column universal joint.

Install a new universal joint.

go back to the central

position without the

assistance of the

driver. Besides, it may

feel obstructed or

unsmooth when the

driver turns the

steering wheel to the

central position.

The sealed pad of the soleplatofsteering

column shaft may be torn

Install a new sealed pad if necessary.

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Table 2-3 (Continued 2)

Fault Possible

Cause

Actions

Blocked or broken tie-rod.

Install a new steering gear if necessary.

Broken or worn front

suspension components.

Install new front suspension components if

necessary.

Incorrect toe adjustment.

Adjust it if necessary.

Blocked column bearing.

Install a new steering column.

After steering, the steering

wheel will not go back to the

central position without the

assistance of the driver.

Besides, it may feel obstructed

or unsmooth when the driver

turns the steering wheel to the

Contaminated steering oil.

Wash the power steering system.

end and parking the vehicle at

the original position)

or if the belt skids.

Chatter from the steering pump

Loose or broken accessory

drive belt.

Install a new accessory drive belt.

Insufficient oil and possible

leakage.

Refill the oil to the specified height.

Discharge the air in the system.

Noise from power steering

pump

Power steering pump.

Check if there is a leakage. Repair it if

necessary.

Install a new power steering pump if necessary.

119

Table 2-3 (Continued 3)

Fault Possible

Cause

Actions

Swish noise

Oil at a temperature below 54°C

(130°F) flow into the bypass

valve of the housing of pump

valve.

Normal.

With air in the oil and leakage in

the system.

Purify the air in the system.

Sob noise

Tire (improper inflation).

Adjust the tire pressure.

Front wheel alignment

(incorrect).

Align the wheels.

Steering column (bent).

Align it and replace it if necessary.

Insufficient return

Steering gear (malfunction).

Replace it if necessary.

120