Chery A15 / 480 LHD model. Manual - part 144

Measure if the tire pressure is normal. If necessary, inflate it according to the specified
pressure.

Check if there is leakage in the oil tube connectors of the steering hydraulic steering system.

If there is leakage, screw them tightly. Inspect if there is damage, deformation or crack on
the oil tube. If one of the above-mentioned failures is detected, the oil tube should be
replaced.

Check the rotation movement of the steering rack & pinion mechanism at the wheel return
position and the other position, if the rotating torque is too large, check the bending of the
rack and the adjustment of the rack jacking block. If necessary, adjust the pressure of the
rack jacking block or replace the steering rack & pinion mechanism.

Check if the steering control valve is blocked or returned improperly. Replace it, if

necessary.

Remove and inspect the hydraulic cylinder and replace the damaged components.

Adjust the ball pins which locate in the connection of the steering transmission mechanism
to ensure them run smoothly.

Vibration of the steering wheel as turning

※Malfunction symptom

As the engine works, turn the steering wheel. It vibrates, especially at the limit position.

※Malfunction reason

The steering oil pump driving-belt slides.

The oil level is too low in the oil reservoir.

The air enters the steering hydraulic loop

The output pressure of the steering oil pump is insufficient.

The piston of the pressure regulator in the steering oil pump is blocked.

※Diagnosis and Troubleshooting

Check if the steering oil pump driving-belt is sliding or damaged. If necessary, tighten the
tension of the belt or replace it.

Check if the oil level of the oil reservoir reaches the specified value. If necessary, fill with
steering oil.

Check all the connectors of the steering hydraulic system to see if there is leakage of the
steering oil, and discharge the air penetrated into the oil tube.

Check the output pressure of the steering oil pump. Disassemble the pump when the

pressure is insufficient to determine if there is wear or serious internal leakage of the oil
pump; the badly leakage or clog of the pressure－limited valve and pressure regulator

piston; Weakening of the pressure regulator spring, damage on the seal components. Find
out the malfunctions and eliminate them. If necessary, replace the oil pump.

Steering wheel floating or deflecting when the Vehicle runs straight

※Malfunction symptom

It is difficult to keep the vehicle running straight.

※Malfunction reason

The steering control valve torque rod is damaged or too gentle to overcome the transmission

resistance of the steering gear, which does not enable the valve bush return in time.

The movement of the valve bush and valve core is clogged due to the unclean oil.

The steering core of the steering control valve is deviated from the center position.

The relief piston of the steering pump pressure regulator is clamped which makes the flux of

the pump and the pressure difference between the left and right power cylinders too large.

Clearance of the steering transmission mechanism connectors are too large, the connectors
are loose or overworn.

※Diagnosis and Troubleshooting

First, check if the connectors of the steering transmission mechanism are loose, the

clearances of the components are too large, the transmission is slack, in order to eliminate
the trouble in the steering transmission mechanism.

Check if the oil is polluted. If the vehicle is new or repaired or the maintenance and
oil-change regulars are not carried out, the oil may be polluted. The polluted oil should be
replaced.

Check the steering control valve. Turn the steering wheel without starting the engine to
judge that whether the control valve can open and close smoothly. If there is abnormal,
disassemble and check it.

Finally, check if the pressure regulator of the steering pump works normally and the relief
piston is clogged. If necessary, measure the output pressure of the steering pump and then
judge it.

Steering noise

※Malfunction symptoms

There is abnormal noise when the vehicle turns.

※Malfunction reason

The noise in the steering system when the vehicle turns is normal; the noise in the early

2~3min, which appears in the steering pump is normal when the engine is started in cold
weather (20

or even colder)

℃

. But when the noise is abnormal and the turning performance

is affected, the noise can be considered as malfunction. The reasons are shown below：

The looseness of the steering transmission mechanism causes the abnormal turning noise.

The power steering pump is damaged or overworn or air is mixed into the liquid which
causes the loud noise.

The power steering pump driving belt pulley is loose or the belt sliding which causes the
loud noise.

The performance of the steering control valve is poor.

The oil tube connector is loose or the oil tube is broken.

The oil-filter strainer is blocked or there are too much sediments in the hydraulic circuit.

※Diagnosis and Troubleshooting

If there is sound of “click” when the vehicle turns, maybe the steering column connector, tie

rod or ball joint loose. These components should be checked. If necessary, tighten them or
replace  the  damaged  one;  if  the  vibration of  the  steering  column  shaft  is obvious,  replace
the steering column assy;  if the steering gear is installed too loose, tighten  it;  lubricate the
connecting  sections  where  are  necessary.  In  addition,  if  the  steering  pump  driving  belt  is
loose  it will also  make a sound of “click”. Therefore, the steering pump belt wheel  should
be  checked  if  it  is  loose.  If  necessary,  screw  tightly  or  replace  it  to  clear  up  the  noise
failure.

If  there  is  sound  of  “quack-quack”  when  the  vehicle  turns,  especially  when  the  steering
wheel  is turned  from  one  limit  position  to another which  may  be  caused  by the sliding  of
the  power  steering  pump.  Check  the  tension  and  the  wear  status  of  the  driving  belt,  then
tighten or replace it depending on practical situation.

If  there  is  sound  of  “cluck”  from  the  steering  pump  when  the  vehicle  turns,  the  reason
maybe  the  air  bubbles  in  the  oil  which  cause  the  pneumatic  noise  as  the  oil  flows.  First,
check  the  oil  level.  If  it  is  too  low,  fill  the  oil  reservoir  with  oil  to  the  proper  position  to
check and eliminate the leakage  failure. Then, check if the hose  is broken, or the clamp  is
loose  which  the  air  would  enter  the  system.  Replace  the  broken  hose  or  the  clamp,  if
necessary.  After  confirming  that  the  air  entered  the  liquid  of  the  power  steering  system,
discharge the air from the power steering system to eliminate the pneumatic noise. If there
is  sound  of  “hiss”  or  scream  from  the  steering  pump,  and  there  is  no  air  leakage  in  the
hydraulic system, the tension of the driving belt is normal, it shows there is block in the oil
pipeline or the oil pump is overworn and damaged. Repair or replace it.

There is sound of “hiss” when the steering wheel is in limit position or turning slow in spot.
If the noise is extremely abnormal, the performance of the steering control valve may be
incompetent. The control valve should be replaced and compared to eliminate the failure.

PRECAUTION OF STEERING SYSTEM MAINTENANCE

Caution: The steering gear is an important danger-proof component which can affect

the driving security. If failure appears during use, the vehicle should be sent to
the service station designated by Chery; the company is not responsible for the
accidents due to self-disassembling, self-maintenance and improper operation.

The peak rate of flow in the system could not exceed 10L/min, maximal working oil
pressure could not exceed 8Mpa at any time.

After the new steering gear has run for about 2500km, it is required to change the hydraulic
oil and clean the strainer in the oil reservoir. Thereforth, change the oil and do the clean of
every year or 50000km.

Check the tire regularly and keep the tire pressure meets the specification.

If the improper clearance ，block or yawing appears, find out and analyze where the failure

locates in the steering transmission system, power steering system or steering link system
and then resolve it.

Check regularly if the components of the steering system bear the improper impact. Replace

the damaged ones in time.

Do not weld the components of the steering gear and system rod in any means.

Be sure not to touch, knock or wear the tube during use. Each segment should be smooth,
and no knots.

Check the hydraulic oil every month to determine whether it is decreasing, deteriorating or
polluted. The oil should be changed at once when the problem is detected. The No. of the
new added hydraulic oil should be as same as the origin. Mixture is forbidden.

Adding oil of the steering system

Hydraulic oil for the steering system

Working oil: ATF DEXRONⅡ

Substitute oil: No.8 hydraulic transmission oil.

Caution: One steering gear can be refueled with only one kind of oil mentioned above.

It will lead to oil seal damage and leakage if unauthorized oil is used.
Consequently, the steering power will fail.

Adding oil of the steering system

Fill the steering oil reservoir with the specified hydraulic oil. Keep the engine idling, turn

the steering wheel to the left and right limit position (Do not keep the steering wheel stay at
the limit position more than 5 seconds), and continue to refuel the oil reservoir with the
hydraulic oil until the oil level do not decline and no air bubbles appear. The oil level
should reach the half height of the filter core.

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