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Chery A18. Manual - part 106

sealing member of oil pump is damaged. Please find out fault and repair it, and replace new one if it is

necessary.

(III) Waving of steering wheel or wandering occurs during straightline driving of vehicle

Fault condition

It is difficult to drive vehicle running to right ahead direction, while wander to one side during straightline driving

of vehicle.

Fault reason

(1)

Torsion bar of steering control valve is damaged or too soft that makes it is difficult to cope reverse driving

drag of steering gear, and makes valve pocket cannot return to position in time.

(2)

Moment of valve core and valve pocket are blocked because of dirty of oil liquid.

(3)

Valve core of steering control valve deviates from middle position.

(4)

Adjusting piston of voltage regulator of steering pump is blocked that makes oil flow quantity of pomp oil

become too big, and makes pressure difference of left and right chamber of power cylinder become too big.

(5)

Terminal clearance of steering driving mechanism is too big, or connecting piece is loose, or damaged

seriously.

Fault diagnosis and debugging

(1)

At first, check if connecting piece of steering driving mechanism is loose, each part clearance is too big,

and driving is loose. Eliminate fault of steering driving mechanism.

(2)

Check if oil is dirty. For new vehicle or vehicle that has been repaired generally, oil liquid might be dirty

because uncompleted implement of oil-replacing regulation in service period. In generally, it is necessary

to replace dirty oil in this case

(3)

Inspect steering control valve, turn steering wheel before starting engine, and judge if steering control

valve could open and operate freely by mode of hand feeling

(4)

At last, check if work of voltage regulator of steering oil pump is normal, and if relief piston of voltage

regulator is blocked, and conduct judgment by checking output pressure of steering oil pump if it is

necessary.

(IV) Steering noise

Fault condition

Too loud noise occurs while steering vehicle.

Fault reason

During steering, too loud noise occurring from steering system is normal, in cold season (-20

or more cold ),

℃

noise occurs from steering pump in 2-3 minutes after starting engine is normal. But in case that noise is too loud

and impact steering capability, the noise should be considered as fault, reasons of the fault mostly include:

(1) Steering driving mechanism is loose and makes steering noise become too loud.

(2) Power steering pump is damaged or heavy worn, or air interfuses into liquid, and make noise become too

loud.

(3) Driving belt of power steering pomp is loose or driving belt skids, and makes noise become too loud.

(4) Capability of steering control valve is bad.

(5) Fuel pipe terminal is loose or fuel pipe is broken.

Fault diagnosis and debugging

(1)

If sound of “chick” occurs while steering, it is possible that bearing terminal of steering column is loose,

tie

rod is loose, or ball joint spherical joint is loose. Please check above parts, fasten or replace damaged

parts if it is necessary; replace steering column assembly if bearing of steering column tramps seriously;

fasten steering gear if it is assembled too loose; conduct necessary lubrication with connector. Otherwise,

sound of “chick” maybe caused in loose of driving belt of steering pomp, please check if belt wheel of

steering pump is loose, fasten or replace belt wheel if it is necessary, to avoid of noise fault.

(2)

In case that “quack” sound occurs while steering, and louder noise occurs while turning steering wheel

from one limit side to the other limit side, it is possible to be caused in skidding of driving belt of power

steering pomp skids. In this case, please check tension and abrasion condition of driving belt, and replace

driving belt according to demand.

(3)

In case that sound of “cackle” sends out from steering pump while steering, it is possible that blister enters

into oil liquid and makes flowing oil liquid occur aerodynamic noise. In this case, please check highness of

oil liquid, if oil level is too low, please add oil liquid into oil tank to right position, check and eliminate

fault of leakage. Then check if hose is broken down or c

lip is loose that make air enter into system, conduct

replacing damaged hose or clip if it is necessary. After affirming that air

infiltrated into liquid of power

steering system, please exhaust air from power steering system to avoid of aerodynamic noise. If sound of
“sizzle” or squeal occurs from steering pump, but hydraulic system is no phenomena of air leakage, and

tension of driving belt is normal, then it is indicated that oil duct is blocked or oil pump is heavy worn or

damaged, please repair of replace it.

(4)

If sound of “sizzle” occurs from steering gear while steering wheel locating at limiting position or turning

steering wheel slowly in site. If abnormal noise is serious, it is possible to be caused in capability of

steering control valve, please replace control valve and conduct contrastive inspection to eliminate fault.

Chapter 3 Position fixing inspection and adjustment of four wheels

Section 1 Basal inspection

Inspection before fix position of wheel

Inspect tire pressure, and adjust it to regulated pressure

Standard inflation pressure of cool tire (Kpa)

Item

185/70R14-92H Standby tire

Front wheel

250（unload）

Rear wheel

270（unload）

300

Check height of vehicle body

Please add pressure of tire to standard value before check height of vehicle body. (Note: Air pressure of right and

left tires should be consistent)

(1) Measuring point on front part

Measure height from ground to center point of connecting bolt between lower control arm assembly and front

knuckle, height of vehicle body measured from right and left wheel should be consistent basically.

(2) Measuring point on rear part

Check height from ground to center point of connecting bolt

between rear axle and absorber, height of vehicle body

measured from right and left wheel should be consistent

basically.

Note: Please adjust vehicle to regulated height before

inspect position fixing of wheel.

Please check if damage or distortion existing on front and

rear suspension of vehicle.

Check clearance between bearings of vehicle, and replace bearings of front wheel if it is necessary.

Check state of felloe and tire.

Check loosing degree of steering drive rod system and buttonhead.

Park vehicle without any load on level ground

Shake wheel to check loosing degree of front suspension.

Check if absorber could operate normally.

(1)

Check if leakage occurs;

(2)

Check if assembly sleeve is worn;

(3)

Check damping force of absorber, and replace with a new one if it is unqualified.

Note: Oil tank is half filled, cooling water of water tank and engine oil of engine is in regulated level, jack and

driver tools are positioned at pointed position.

II. Inspection on rim and tire

Visual inspection

Inspection（tire and rim）

Please replace a new one if crack, damage, distortion, and

other problem are found on rim or tire. Shown as figure

Inspection on abrasion of tire

(1)

Check depth of remained tire tread. Standard tire

shown in figure:

1.6mm at least

Snow tire: 50% tire tread.

Fig. Abrasion of tire

(2)

It is necessary to replace a new tire if abrasion

indicator appears.

Fig. Abrasion indicator of tire

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