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Renault Scenic 3 Chassis. Manual - part 2

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GENERAL VEHICLE INFORMATION

Schematic diagram of the brake circuit

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« X »-shaped braking circuit

3877

IMPORTANT

This is a general system diagram, do not use it as a
reference for take-off points or circuit allocation.
When replacing a vehicle's braking circuit compo-
nents, always mark the pipes before removing them
as they must be reconnected in their original posi-
tions.

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GENERAL VEHICLE INFORMATION

Brake circuit pipes and unions

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Parts identification:

- shape of the steel or copper pipe end piece (A),

- shape of the threaded housings on components (B),

- shape of unions (C): 11 mm Allen key.

WARNING

- The pipes between the master cylinder, callipers

and the hydraulic assembly are connected using
threaded unions with a metric thread.

- Therefore, only parts specified in the Parts Catalo-

gue for this vehicle should be used.

78491

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GENERAL VEHICLE INFORMATION

Brake fluid

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BRAKE FLUID REPLACEMENT INTERVALS

Our brake technology, in particular our disc brakes (hol-
low pistons which conduct little heat with a small
amount of fluid in the cylinder and sliding callipers avoi-
ding the need for a fluid reservoir in the least cooled
area of the wheel), has allowed us to reduce the risks
of « vapour-lock » as far as possible, even if the brakes
are used intensively (in mountainous areas). However,
current brake fluids are subject to a slight deterioration
during the first months of use as a result of a small
amount of humidity intake. Reasons for it being recom-
mended that you change the brake fluid: see the war-
ranty and servicing book for the vehicle.

1 - Topping up the level

Brake pad wear will result in a gradual drop in the fluid
level in the reservoir.

The fluid should not be topped up as the level will rise
again when the pads are changed. However, the brake
fluid level should not drop below the minimum mark.

2 - Approved brake fluid

Mixing two incompatible brake fluids in the circuit could
lead to major leaks, mainly due to damage to the cups.

To avoid these risks, it is essential to only use brake
fluids which have been checked and approved by our
laboratories and which comply with the SAE J 1703-
DOT4 standard.

For optimized braking, RENAULT recommends a brake

fluid with low viscosity in cold conditions (750 mm

/ s

at 40˚C maximum).

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GENERAL VEHICLE INFORMATION

Brake: Specifications

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(1) Scenic.

(2) Long Scenic.

(3) Brake discs cannot be reground. In case of excessi-
ve scoring or wear they must be replaced.

Engine

K4J, K4M, K9K

F9Q, F4R

Front brakes (mm)

Piston diameter

Disc diameter

280 (1)

300 (2)

300

Disc thickness

Minimum disc thickness (3)

21.8

Maximum disc run-out

0.07

Brake lining thickness (including support)

Minimum brake lining thickness (including support)

Rear brakes (mm)

Piston diameter

Disc diameter

270 (1)

274 (2)

Disc thickness

Minimum disc thickness (3)

6.5

Maximum disc run-out

0.07

Brake lining thickness (including support)

Minimum brake lining thickness (including support)

Master cylinder (mm)

Diameter

23.8

Stroke

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