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Technical Note 3451A
XXXX
Affected vehicles: All types
Basic manual: Technical Note 3439A and 3669A
Sub-section concerned: 20A
Clutch: Fault finding aid
The purpose of this Technical Note is to avoid parts being removed in after-
sales without a priori technical justification.
It consists of a clutch fault finding aid for:
difficulties in changing gear,
vibrations,
noise.
77 11 298 722
Edition 2 - DECEMBER 2004
EDITION ANGLAISE
"The repair procedures given by the Manufacturer in this document are based on the
technical specifications current when it was prepared.
RENAULT s.a.s. reserves all copyright
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is prohibited without the prior written authority of
RENAULT s.a.s.
The methods may be modified as a result of changes introduced by the manufacturer
in the production of the various component units and accessories from which their
vehicles are constructed."
© Renault s.a.s. 2004
120A
CLUTCH
Fault finding
CLUTCH
Fault finding
20A
GEAR CHANGE PROBLEMS (grinding - stiff point)
Check the clutch plate release (see
20A,
Clutch, Fault finding, Checking procedure
)
Check clutch fork travel (see
20A, Clutch,
Fault finding
)
no
Is the check correct?
Is the clutch plate released?
yes
no
yes
Check the control lever adjustment
(see Technical Note 3439A, 3669A or updated)
(adjust if necessary)
Fault involves pedal assembly
Check:
– excess carpet thickness on floor?
– fork cable gaiter?
– automatic take-up?
(repair if necessary)
If the fault is still present
Check the level and appearance of the oil in the
gearbox
(If necessary replace the oil)
Replace clutch
If the fault is still present
Internal gearbox fault (repair)
20A-1
CLUTCH
Fault finding
20A
VIBRATION
Check if there is grease in the clutch housing
Treat the leak and replace the clutch
plate or the whole clutch
Otherwise
Check tightness and condition of engine and
gearbox supports
(repair if necessary)
If the fault is still present
Check the clutch control slides properly
(repair if necessary)
If the fault is still present
Check the idling speed
(unstable or low).
Adjust if necessary
If the fault is still present
Replace clutch
20A-2
CLUTCH
Fault finding
20A
NOISE IN NEUTRAL
(dull, regular sound modulated by engine speed, coming from grinding of gear wheels in gearbox)
Check if there is grease in the clutch housing
Treat the leak and replace the clutch
plate or the whole clutch
Otherwise
Check the idling speed
(unstable or low)
(adjust if necessary)
If the fault is still present
Check tightness and condition of engine and
gearbox supports
(repair if necessary)
If the fault is still present
Check the level and appearance of the oil in the
gearbox
(If necessary replace oil)
If the fault is still present
Replace clutch
20A-3
CLUTCH
Fault finding
20A
CHECKING PROCEDURE
CLUTCH PLATE RELEASE
(engine warm at idle speed)
FORK TRAVEL
Using a tape measure:
– measure the distance between the top of the
fork and the sleeve stop mounting in engaged
position,
– repeat the same operation in declutched
position,
– note the difference and compare with the
correspondence table.
Gearbox without reverse gear brake:
– declutch,
– wait for
3 seconds
,
– select reverse gear (there should be no
grinding).
Gearbox with reverse gear brake or
synchronisation:
– declutch,
– partly engage 3
rd
gear (the objective is to
position the sliding gear wheel teeth close to the
dog clutches without engaging gear),
– declutch,
– wait for
3 seconds
,
– engage 3
rd gear
(there should be no grinding).
20A-4
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