Chery A18. Manual — part 2
CLUTCH DISASSEMBLY
·Disassemble the transmission.
·Unscrew 9 fixed bolts in flywheel
cornerwise and dismount the flywheel.
·Remove clutch plate.
·Pry out snap ring of release disk by
screwdriver and remove the release disk.
·Unscrew 6 connection bolts in clutch
pressure
plate
and
output
end
of
crankshaft, and remove the clutch pressure
plate.
CLUTCH OVERHAUL
· Clutch friction disk: measure the dent depth of
rivet head, i.e. the distance between the rivet head
and the friction disk surface. In case it is found that
the depth reaches the using limit for any hole, the
friction disk shall be changed.
Standard value Maintenance
Rivet head
Dent depth
1.5mm
0.06in
0.5mm
0.02in
·Measure the clutch disc runout using a dial indicator.
If the runout is excessive, replace the clutch disc.
Runout 0.8mm max
Clutch pressure plate:
·Examine whether the diaphragm spring has
abnormal wear or damage.
·Examine whether the pressure plate has wear or hot
point.
·In case of any abnormality, the pressure plate shall
be changed. The pressure plate shall not be
disassembled into two parts: diaphragm spring and
pressure plate.
·Measure the clutch pressure plate runout using a dial
indicator. If the runout is excessive, replace the
clutch disc.
Runout 0.25mm max
Flywheel:
·Examine whether the connection surface of friction
disk exists abnormal wear or hot point; the change
or maintenance shall be conducted if necessary.
·Measure the flatness of the flywheel with a straight
edge and a feeler gauge. If not as specified, replace
the clutch cover.
Maximum clearance 0.05mm
Service limit 0.15mm
CLUTCH INSTALLATION
Before the assembly, flywheel surfaces and pressure
plate shall be clear and dry.
——Assemble the pressure plate on the crankshaft
and screw up bolts in accordance with
prescribed moment.
—— Assemble release disk and fit on snap ring.
—— Assemble clutch disk.
N•m
Kg-m
1b-ft
Pressure plate
assembly bolt
Torque
57-65
5.7-6.5
41.5-47.0
—— Assemble flywheel.
——Screw up flywheel bolt uniformly according to
the diagonal line.
——Coat a thin layer of grease on the input axle
and then assemble the transmission with
engine.
Remarks:
When put the input axle of transmission into the
clutch friction disk, the flywheel shall be revolved
until the input axle of transmission and spline
meshed.
N•m
Kg-m
1b-ft
Flywheel
bolt
Torque
18-28
1.8-2.8
13.5-20.0
TROUBLE DIAGNOSIS
Trouble
symptom
Cause
Treatment method
Slip of clutch
•Free travel (free play) of clutch pedal is wrong.
•Abrasion or oil stain for clutch friction disk.
•Distortion for friction disk 、 pressure plate or
flywheel surface.
•Diaphragm springs become weaker.
Adjust free travel
Change friction disk
Change
frication
disk,
pressure plate or flywheel
Change clutch pressure plate
Uncompleted
segregation of
clutch
•Free travel of clutch pedal is wrong.
•Diaphragm springs become weaker or abrasion for
stabber fingertip.
•Rust for input axle spline.
•Mutilation or abrasion for input axle spline of
transmission.
•Excessive nodding action for clutch friction disk
assembly.
•Abrasion or oil stain for clutch friction disk.
Adjust free travel
Change pressure plate
Lubricate
Change the input shaft
Change friction disk
Change friction disk
Vibration of
clutch
•Brighten of clutch friction disk (to become
glassiness).
•Oil stain for clutch friction disk.
•Bad skid of segregation bearing on the bearing
sleeve of transmission.
•Shimmy of clutch friction disk assembly or bad
connection of friction disk.
•Vibration reduction torsion springs of clutch
friction disk assembly become weaker.
•Loose of rivet of clutch friction disk.
•Distortion of pressure plate or flywheel surface.
•Loose of the binding bolt of flywheel or loose of
binding bolt of pressure plate assembly.
Repair or change friction
disk
Change friction disk
Lubricate
Change friction disk
Change friction disk
Change friction disk
Change pressure plate or
flywheel
Screw down
Clutch noise
•Abrasion or mutilation for segregation bearing.
•Abrasion for front bearing of input axle.
•Abnormal noise for clutch friction disk.
•Crack for clutch friction disk.
•Abnormal noise for pressure plate and diaphragm
spring.
Change segregation bearing
Change input shaft bearing
Change friction disk
Change friction disk
Change pressure plate
Non-separation of
clutch
•Clutch friction disk has fat liquor.
•Serious wear of clutch friction disk.
•Rivet head is displayed in surface of disk.
•Torsion springs become weaker
Change friction disk
Change friction disk
Change friction disk
Change friction disk
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