Geely EC718, EC718RV, EC715, EC715RV. Manual part — 283

No

Step 4

Check whether the wheel and tire run out is abnormal?

Yes

Measure and correct the tire run out.

No

Step 5

Check whether the vehicle front end height is abnormal?

Yes

Adjust the vehicle front end height.

No

Step 6

Check whether the strut assembly is installed correctly?

Yes

Replace the strut assembly. Refer to

4.2.7.3

Front Strut Assembly Replacement

No

Step 7

Check whether the lower control arm is loose?

Yes

Tighten the lower control arm connecting
bolts. If necessary, replace the lower control
arm bushing. Refer to

4.2.7.2

Lower Control

Arm Bushing Replacement

No

Step 8

Check whether the vehicle Curb Weight is normal, whether it is overloading?

Yes

Restore the the vehicle factory Curb Weight.

No

Step 9

Carry out four tires positioning.

4.4.4.4 Wheel Bearing Diagnostic

Warning!

Please road test the vehicle safely and comply with all traffic laws and regulations. Do not try operation that might
jeopardize the vehicle control. A breach to the safety precautions can result in serious personal injury and damage to
the vehicle.

Step 1

Road test the vehicle to verify the fault.

Suspension System

Wheels and Tires

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Tip: When the sealed wheel bearing is damaged, foreign matter will
enter the bearing and damage the bearing. When the bearing
rotates under external stress, it will send out hum noise similar to
the aircraft taking off. The noise only occurs when vehicle is driving.
The noise is stable. The noise increases as the the vehicle speed
increases.

Next

Warning!

To avoid the vehicle damage, serious personal injury or even death, using a jack to support the vehicle when remove
the major components from the vehicle.

Step 2

Confirm whether the noise is from the wheel bearings. If it can not be determined during the road test, lift
and support the vehicle.

Next

Step 3

Check whether wheels are bent?

Yes

Replace the wheels. Refer to

4.4.5.1

Wheel

Replacement

No

Step 4

Check whether the wheels are in imbalance?

Yes

Carry out the wheel balancing.

No

Warning!

When rotating the wheel with hand, hold the tire with. If the location is not correct, it is likely to cause bodily injury.

Note

The front wheel bearing is pressed into the steering knuckle. The rear wheel bearing is inside brake drums and wheel
bearing assembly. If the inside seat ring and the rear wheel bearing are separated, it will lead to the noise.

Step 5

Rotate the tire and wheel assembly, listen to the wheel bearings noise.

Yes

Replace the wheel bearings. Refer to

4.2.7.9

Front Wheel Hub Replacement

No

Step 6

Shake the wheel with hands, check whether the wheel bearing is loose?

Yes

Replace the wheel bearings. Refer to

4.2.7.9

Front Wheel Hub Replacement

No

Step 7

Compare with a the same model normal vehicle to confirm whether the noise is a normal operating noise.

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Wheels and Tires

Suspension System

4.4.4.5 Wheel Vibration Diagnostic

1. Tire Dynamic Balancing

The tire balancing is the most easy to check procedure. If vibrations occurs at high vehicle speed, conduct dynamic balance first.
Firstly, carry out the double-sided dynamic balancing under the vehicle to correct tire and wheel assembly imbalance. Correct the
brake disc or wheel covers imbalance on vehicle. If the balance does not eliminate the high speed vibration, or if the vibration occurs
at the low speed, the vibration is likely caused by run out.

2. Run Out

Tires, wheels or the connection between the wheels and the vehicle may lead to run out. In order to inspect the possibility of run out
the wheel produced. Refer to the following wheels run out diagnostic procedure.

Warning!

Please road test the vehicle safely and comply with all traffic laws and regulations. Do not try operation that might
jeopardize the vehicle control. A breach to the safety precautions can result in serious personal injury and damage to
the vehicle.

Step 1

Road test the vehicle to verify the fault. Whether the customer described vibration is a fault?

No

Replace the front wheel bearings. Refer to

4.2.7.9

Front Wheel Hub Replacement

Yes

Step 2

Determine the speed when the vibration occurs. Is vibration occurring at 65 km/h or above?

No

Go to step 5

Yes

Step 3

Carry out the off-vehicle tire dynamic balance. Road test the vehicle to confirm the existence of the fault?

No

The fault has been fixed.

Yes

Step 4

Carry out final on-vehicle balance. road test the vehicle to confirm the existence of fault?

No

The fault has been fixed.

Yes

Step 5

Check the wheels free face and radial run out (Standard Value: 1.0 mm / 0.0394 in). Is the value specified
value?

No

Go to step 8

Yes

Step 6

Check whether there is an imbalance in transmission?

Thoroughly examine the drive axle and the constant-velocity joints.

Suspension System

Wheels and Tires

4-63

No

Replace the faulty components.

Yes

Step 7

Check the wheel flange run out(Standard Value: 0.26 mm /0.0102 in). Is the value specified value?

No

Replace wheel hub assembly. Refer to

4.2.7.9

Front Wheel Hub Replacement

Yes

Step 8

Remove the wheel assembly. Remove the tires. measure the wheel run out (Standard Value: 0.8 mm / 0.03
in), Is the value specified value?

No

Replace the wheels. Refer to

4.4.5.1

Wheel

Replacement

Yes

Step 9

Replace the tires.

Next

Step 10

Confirm whether the fault has been excluded.

4.4.4.6 Wheels Run Out Inspection

1

2

3

3

FE04-1015b

Measure the wheel run out with a dial indicator on-vehicle or off-vehicle. Make sure the installation surface is correct. Measurements
can be carried out with or without tires installed. Measure radial and face run out inside and outside the wheel rim. install a dial gage
on the wheel and tire assembly, slowly turn wheels a circle and record the dial indicator readings. if the measured value exceeds
the following specifications, and the wheel balance can not eliminate the vibration, then replace the wheel.

Steel Wheels
Radial Run Out: 0.8 mm (0.03 in)
Face Run Out: 1 mm (0.04 in)

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Wheels and Tires

Suspension System