Renault Laguna III, Manual

Page: 2369 / 3699

37A
-
35
MECHANICAL COMPONENT CONTROLS
Braking assistance circuit: Check
37A
a
Connect a vacuum pump to the end of the non-re-
turn valve.
a
Activate the vacuum pump a few times.
a
Check to see if the pressure drops. If it does, there is
a hole in the non-return valve. Change the non-re-
turn valve (see
37A , Mechanical component con-
trols , Brake servo non-return valve: Removal -
Refitting , page 37A-4 ) .
a
Connect the non-return valve to the intake distribu-
tor.
IV - CHECKING THE VACUUM PUMP
a
Connect the external vacuum pump to the engine
vacuum pump.
a
Start the engine.
a
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 sec-
onds at an engine speed of 4050 rpm .
a
Replace the vacuum pump if the values are different
(see
37A , Mechanical component controls , Vacu-
um pump: Removal - Refitting , page 37A-14 ) .
a
Connect the non-return valve to the vacuum pump.
122866
F4R, and 800 – K4M or M4R or V4Y
K9K or M9R or V9X
106889