Chery S11 / Chery QQ. Manual — part 53

Chery QQ Service Manual

Charging System

12. Remove 4 bolts and baffle and push out the bearing on the driving end.

13. If necessary, loosen stud bolts and pull out the stator.

Note: Heating the frame on the driving end may facilitate disassembling stator.

Assembling

Before disassembling，evaluate the faults. After that, find out the part subject to

malfunction by means of careful check. Make available the parts for exchange use,

and then assemble the generator in the step contrary to that of disassembling.

Note:

（

1）When the stator coil is inserted into the frame on the driving end, the recess in

the stator should be aligned with the stud bolts.

（

2）When the brush carrier assembly is installed, the brush mush be thoroughly

disengaged from slip ring.

Note:

When the rectifier is installed, check whether there is an enough big gap between

※

stator conductor and cooling fan blade.

Avoid over

※

-tightening the insulator nuts of terminal post.

Tightening torque of stud bolt: 7～8.8N.m,

Tightening torque of frame bolt/nut and nut in the terminal post: 4～5N.m

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Chery QQ Service Manual

Charging System

Tightening torque of belt pulley nut: 95～130N.m

Check and Adjustment

Rotor ground

The slip ring and rotor core should be conductively closed,

which should be checked by means of ohmmeter.

Open circuit

Connect the ohmmeter probe to the slip ring to check whether

the exciting coil is current-carrying and its electric resistance value. If the value

exceeds the specified one, replace the rotor.

The electric resistance value of exciting coil:

2.8-3.0Ω

Fan

The status of all the fan blades is good.

Bearing

Check whether it rotates stably using hand.

Bearing of drive shaft

Before removeing it, rotate it with hand to see whether it rotates stably.

Stator Ground

Check the stator coil and magnetic core for insulation

with ohmmeter.

Open circuit

Check whether it is conductive between neutral point A

and leg of circuit B.

Rectifier

With kΩohmmeter, check whether it is

conduction between B terminal post and earth

connection. Put one probe on B terminal post,

and the other on the earth connection. And then

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Chery QQ Service Manual

Charging System

exchange the places of the two probes. Only one should be conductive, the other

should be infinite. Otherwise, replace the rectifier assembly.

Note:

Never use a 500V megohmmeter to test the rectifier, because it may damage

the diode of the rectifier.

Condenser

Use a capacitance measuring tester to check

the capacitor state.

Condenser capacitance: 0.15µF.

Brush

Refer to the chart to measure the length of the

brush, and check its worn condition. If its

length has reached the maintenance limit

value, it should be replaced, together with the

brush.

Maintenance limit value of brush length (min.): 4.5mm（0.18in）

. Technical Data of Generator

Ⅳ

Rated voltage

12V

Maximal output

50A（thermal state 13.5V）

Maximal tolerable speed

18.000r/min

No-load speed

1110 r/min

Set voltage

14.2 to14.8V

（

5000 r/min）

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Chery QQ Service Manual

Charging System

10A25℃（77℉）

Tolerable ambient temperature

-30 to 90℃

-22 to 194℉

Polarity Minus

ground

Rotation direction

Clockwise, seeing from belt pulley

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