Brake Servo: Check - Renault Duster 2007 Manual

MECHANICAL COMPONENT CONTROLS
Special tooling required
Ms. 583 Pipe clamps.
CHECKING THE SEALS
a When checking the brake servo seals, ensure that
there is a perfect seal between this and the master
cylinder. If there is a leak here, replace the seal (A) .
The brake servo seals must be checked when fitted
on the vehicle and when the hydraulic circuit is oper-
ational.
a Connect thebetween the brake servo and the vacu-
um source (inlet manifold) with a « T » union and the
shortest possible pipe.
a Let the engine idle for approximately 10 minutes.
a Press the pipe between the « T » union and the vac-
uum source using the (Ms. 583) (1) .
If the vacuum drops by more than 33 mbar in 15 se-
conds, there is a leak either:
- at the non-return valve (replace it),
- at the pushrod diaphragm (if this is the case, you
should replace the brake servo).

Brake servo: Check

37A-55
If the brake servo is not operational, the braking sys-
tem will operate but the force required at the pedal to
obtain the equivalent deceleration as for assisted
braking is considerably higher.
37A
3701