7 Series E38 750i (M73) SAL
Installation of individual components:
Trunk lid module and hydraulic control unit:
The trunk lid module (1) and the hydraulic control unit (2) are
located on the right in the luggage compartment between the "C-
pillar extension" and the outer shell.
The hydraulic control unit (2) is activated by the trunk lid module
(1).
Hydraulic cylinder:
The hydraulic cylinder is located on the left trunk lid hinge in place
of the gas pressure spring.
Inclination switch:
A double inclination switch is located below the handle in the
tailgate trim.
Emergency trunk lid operation:
If the automatic controls malfunction, the trunk lid can be opened
and closed by hand without additional supplementary measures
such as conventional manual operation of the trunk lid.
The force need for emergency operation is greater.
Emergency operation is determined by:
-
the switching pressure of the emergency valve
(mechanical/hydraulic pressure limiting valve),
-
the geometric adaptation of the trunk lid hinge and
-
the omitted gas pressure spring support on the left.
Safe stopping in an open position is assured in an opening angle
range of 30
°
to 90
°
. This is achieved by a minimum system
pressure of 40 bar (determined by the emergency valve).
Checking fluid level in hydraulic control unit:
Test conditions:
Open trunk lid (by motor) once and then close again so as to
bleed the system.
Open trunk lid again (by motor) and pull cover (3) at front to one
side.
Note:
The expansion rivets (1) are not released here. Make sure
that the emergency release mechanism (2) is correctly fitted.
RA Information on automatic trunk lid controls (electrohydraulic)
BMW AG - TIS
19.02.2013 21:02
Issue status (12/2007) Valid only until next DVD is issued
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