RENAULT SCENIC 2007 J84 / 2.G Transmission - Clutch Workshop Manual

Transmission
"The repair procedures given by the manufacturer in this document are based on the
technical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from
which his vehicles are constructed."
V1
All rights reserved by Renault s.a.s.
Edition Anglaise
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is forbidden without the prior written authority of
Renault s.a.s.
© Renault s.a.s.
V1 MR-372-J84-20A000$000_engTOC.mif
CLUTCH
Clutch - Operation 20A - 2
Hydraulic clutch - Operating diagram 20A - 3
Hydraulic clutch - Tooling and equipment 20A - 4
Hydraulic clutch - Customer complaints 20A - 5
Hydraulic clutch - Fault finding chart 20A - 6
20A
MR-372-J84-20A000$000_engTOC.mif

CLUTCH
Clutch - OperationCLUTCH
Clutch - Operation
20A
20A - 2
20A
20A - 2V1 MR-372-J84-20A000$166_eng.mif
120A
CLUTCH
Clutch - Operation
The clutch is a system which enables mechanical action to be either linked or not to an end component.
It is made up of an assembly of parts located between the engine and the transmission components.
It ensures the following functions:
●When engaged: transmits the power provided.
●When disengaged: this transmission is interrupted.
●Between the two positions: the transmission of power is gradually restarted.
There are different types of clutch:
●Depending on number of discs:
●dry single disc clutch,
●dry double disc clutch with single control,
●double disc clutch with separate control (double),
●wet or dry multidisc clutch.
●Depending on type of control:
●manual control,
●hydraulic control,
●electric control with electronic servo.
The system is made up of the flywheel (b) (attached to the engine) (the bolts in the centre are screwed into
the crankshaft (a)).
The clutch plate is attached to the gearbox.
The outermost part is called the friction or pad. The pressure plate ensures that the clutch plate is held
against the flywheel when the clutch is engaged, as this is what ensures that they turn at exactly the same
speed, one driving the other.
The pressure plate springs are pushed in by the clutch thrust bearing.
When the clutch control (hydraulic, or cable operated) is activated, the clutch plates move apart and less and
less movement is transmitted, leaving the gearbox free of the engine. This, for example, allows the vehicle
remain stationary without stalling the engine, or a gear to be changed.
The opposite action involves gradually releasing the clutch control, so that the engine and gearbox are
reconnected. This manoeuvre is called "slipping the clutch".
a:crankshaft
b:flywheel
c:pressure plate
d:spring
e:clutch pedal
f:clutch thrust bearing
g:gearbox input shaft
h:clutch plate
i:clutch plate pad
MR-372-J84-20A000$166_eng.mif

CLUTCH
Hydraulic clutch - Operating diagramCLUTCH
Hydraulic clutch - Operating diagram
20A
20A - 3
20A
20A - 3V1 MR-372-J84-20A000$332_eng.mif
CLUTCH
Hydraulic clutch - Operating diagram
Cross section of the hydraulic system:
Overall diagram of the hydraulic system:
a:seal
b:pipe
c:reservoir
d:piston
e:master cylinder
f:slave cylinder
g:piston
a:hydraulic fluid reservoir
b:master cylinder
c:duct + filter
d:slave cylinder
MR-372-J84-20A000$332_eng.mif

CLUTCH
Hydraulic clutch - Tooling and equipmentCLUTCH
Hydraulic clutch - Tooling and equipment
20A
20A - 4
20A
20A - 4V1 MR-372-J84-20A000$498_eng.mif
CLUTCH
Hydraulic clutch - Tooling and equipment
Standard tooling is used
MR-372-J84-20A000$498_eng.mif

CLUTCH
Hydraulic clutch - Customer complaintsCLUTCH
Hydraulic clutch - Customer complaints
20A
20A - 5
20A
20A - 5V1 MR-372-J84-20A000$664_eng.mif
CLUTCH
Hydraulic clutch - Customer complaints
Customer complaint: the clutch pedal remains depressed after use.
Use the fault finding chart (see next page) in the following cases:
●The pedal remains depressed, without the vehicle moving, with the engine running or stationary:
–either after making several successive manoeuvres,
–or after leaving the foot down on the pedal using moderate force for a reasonably prolonged period.
The function temporarily returns to normal after releasing the pedal manually.
●The pedal remains depressed only after reasonably prolonged use of the vehicle, particularly in heavy
traffic.
The function temporarily returns to normal after releasing the pedal manually.
●The pedal remains depressed immediately after each manoeuvre. There is little or no force felt from the
pedal and returning the pedal manually does not stop the fault from recurring.
●After a prolonged stop in the disengaged position, first gear engaged (stop at traffic lights, for example),
the vehicle has a tendency to creep forward after a certain amount of time. If the pedal is released, it does
not return.
MR-372-J84-20A000$664_eng.mif

CLUTCH CLUTCH
20A
20A - 6
20A
20A - 6V1 MR-372-J84-20A000$830_eng.mif
CLUTCH
Hydraulic clutch - Fault finding chart
NOTES–Check that the customer has not topped up the brake fluid level.
–Check the condition of the brake pads before topping up the brake fluid.
Check the area surrounding the pedals, on the passenger compartment side.
Is the floor carpet or another foreign body blocking the travel of the clutch pedal?
NO YES
Check the return spring and the pushrod for the
pedals.
Are there any anomalies?
NO
Check the level of hydraulic fluid
Is the level below the take-off point supplying the
master cylinder?NO
YES
Check the sealing of the hydraulic circuit pipes
Are there any leaks around the unions or pipes?NO
YES
Carry out the necessary repairsNO
Disengage the pedal and check that the
customer complaint is no longer present.
YESRepair the anomaly and check that the
customer complaint is no longer present.
MR-372-J84-20A000$830_eng.mif

CLUTCH
Hydraulic clutch - Fault finding chartCLUTCH
Hydraulic clutch - Fault finding chart
20A
20A - 7
20A
20A - 7V1 MR-372-J84-20A000$830_eng.mif
Replace the clutch (clutch disc, pressure plate
and slave cylinder).
Bleed the hydraulic circuit.
Has the fault disappeared?
NO YES
Contact the Techline.
NOTES–Check that the customer has not topped up the brake fluid level.
–Check the condition of the brake pads before topping up the brake fluid.
Bleed the hydraulic circuit.
Are air bubbles present throughout the bleed?
YES
Replace the master cylinder.
Bleed the hydraulic circuit.
NOHas the customer complaint disappeared?
YES
Check that the customer complaint does not reappear during
a road test.
Remove the clutch and check the condition of the clutch and check that it is clean inside.
Are the internal walls of the clutch soiled with oil?
Check the mileage and the condition of the clutch.
YESDoes the vehicle have more than 30,000 miles (50,000 km) on
the clock?
NO
Replace the slave cylinder.
Check that the customer complaint
does not reappear during a road
test.