Renault Clio: Brake servo: Check
RIGHT-HAND DRIVE
There is no "RENAULT" tool to check the braking assistance
circuit.
Use a vacuum pump fitted with couplings, part numbers
7701349942 and 7700105874 with hose part
number 8200027352 or 8200376245.
CHECK
I - CHECKING THE SEALS
- When checking the brake servo seal, ensure that there is a perfect seal
between this and the master cylinder (A).
If there is a leak in this area, replace the seal between
the brake servo and the master cylinder (see
37A, Mechanical component controls, Master
cylinder: Removal - Refitting, 37A-2).
The brake servo seals must be checked on the vehicle
with the hydraulic circuit operational.
II - CHECKING THE BRAKE SERVO
- Remove the front engine cover (if fitted to the vehicle).
D4F, and 784
- Remove:
- the bolts (1) from the turbocharger heat shield,
- the turbocharger heat shield (2),
- the oxygen sensor (3) (see Oxygen sensors: Removal
- Refitting) (MR 392, 17B, Petrol injection),
- the bulkhead heat shield clips (4),
- the bulkhead heat shield (5).
D4F, and 784
- Refit:
- the bulkhead heat shield,
- the bulkhead heat shield clips,
- the oxygen sensor (see Oxygen sensors: Removal
- Refitting) (MR 392, 17B, Petrol injection),
- the turbocharger heat shield,
- the turbocharger heat shield bolts.
III - CHECKING THE NON-RETURN VALVE
D4F or F4R or K4J or K4M or M4R
- Disconnect the non-return valve on the inlet manifold
side.
K9K
- Disconnect the non-return valve on the vacuum
pump side.
- Connect a vacuum pump to the end of the non-return
valve.
- Activate the vacuum pump to obtain a vacuum of
500 mbar.
- Check that the vacuum pressure does not drop. If it
does, the non-return valve is pierced. Replace the
valve (see 37A, Mechanical component controls,
Brake servo non-return valve: Removal - Refitting, 37A-26).
D4F or F4R or K4J or K4M or M4R
- Refit the non-return valve on the inlet manifold.
- Refit the front engine cover (if fitted to the vehicle).
IV - CHECKING THE VACUUM PUMP
K9K
- Connect the external vacuum pump to the engine
vacuum pump.
- Start the engine.
- Check the following values:
- 550 mbar in 5 seconds at an engine speed of 700
rpm,
- 700 mbar in 3 seconds and 900 mbar in 5 seconds
at an engine speed of 4050 rpm.
- Replace the vacuum pump if the values are different
(see 37A, Mechanical component controls, Vacuum
pump: Removal - Refitting, 37A-68).
- Refit the non-return valve to the vacuum pump.
READ NEXT:
LEFT-HAND DRIVE
WARNING
Prepare for the flow of fluid, and protect the surrounding
components.
REMOVAL
I - REMOVAL PREPARATION OPERATION
Position the vehicle on a two-post lift (see Vehicle:
Towin
LEFT-HAND DRIVE
WARNING
Prepare for brake fluid outflow, to prevent damage
to the mechanical parts and bodywork around the
braking system.
REMOVAL
I - REMOVAL PREPARATION OPERATION
Position the veh
SEE MORE:
WARNING
Do not run the engine without the accessories belt
to avoid damaging the crankshaft accessories pulley.
Note:
Two different engine support tools can be used to
remove the right-hand suspended engine mounting:
the (Mot. 1453) fitted with the (Mot. 1453-01)
used only for standard remo
REMOVAL
OPERATION FOR REMOVAL OF PART
CONCERNED
Unclip:
the upper cover,
the lower cover.
Note:
When removing the rear view mirror, be careful
not to damage the rain sensor nearby.
Disconnect the connectors.
Remove the rear view mirror.
REFITTING
REFITTING OPERATION FOR PART CONCERN
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