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.

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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. 

 
 

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