Chery QQ - Diagnosis Info and Procedure; Service Guide

Chery QQ Service Manual Chassis System
2.Diagnosis info and procedure
1) Brake disc depth deviation check
Measure brake disc depth in 4 points or
more to check brake disc depth
deviation. Use micrometer to measure
all values on same distance from brake
disc edge.
2) Brake disc transverse hop check
Attention: When removing the disc from
wheel bearing flange, clear the rust or
dirt on the interface of the disc.
Leave wheel on the vehicle to check
transverse hop in order to get more
accurate hop in actual brake condition.
If there are no any wheel check units
on vehicle, remove wheel to check. Keep
the position of caliper to insure exact
readings.
Disassembly procedure
1. Support and lift vehicle.
2. Mark dots on wheel and wheel hub.
3. Remove wheel.
4. Clear surface of the disc.
5. Install and screw wheel nuts.
6. Fix micrometer to steering node.
Must keep the contactor of micrometer
contact with 10mm from edge of surface
of the disc.
7. Set micrometer to zero.
8. Turn wheel a circle. Check the hop
in micrometer. If the hop exceeds 0.1mm,
repair or replace the disc. If total
hop exceeds 0.1mm, adjust or replace
the disc.
Under some conditions, the over
Transverse hop can be improved by
demarcate the position of the disc on
wheel hub. If the hop cannot be
improved in this way, check if the hop
of wheel hub is too big or too loose.
If the hop exceeds 0.05mm, wheel hub
must be replaced. If the hop is
satisfied the request, the brake disc
could be repaired or replaced.
Steps of installation
1. Remove wheel nuts fixing the disc
on wheel hub.
2. Please refer “ Install and
removing tire and wheel” when
install tire and wheel. Align wheel
and tire with original marks.
3.Lower vehicle
3.Service guide
1)Brake gasket check
 Check brake lining once driving
every 10，000—15,000km.
 Check brake lining once replacing
wheel or tire.
 Check two ends of caliper and two
ends of out lining. Worst wear is
usually in this position.
 Check the thickness of lining to
insure the lining is not worn early.
Some linings have a
heat-insulating layer. Don’t
mistake the layer as lining. Inner
lining can be checked through check
hole on top of caliper.
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Chery Automobile Co., Ltd