BMW 3 (E46). Manual - part 234
Once hydraulic lines have been
disconnected from hydraulic
components, top must not be
moved. Fluid will leak from
separated coupling.
Avoid scratching hydraulic piston
rods. Even paint mist and welding
spots are harmful.
When working around hydraulic
cylinders, cover with a protective
cloth.
Working in the trunk at the convertible
top hydraulic unit, disconnect the supply
and return lines and connect them to
each other (short circuit). The system is
thus closed and the couplings are
protected against damage. The hydraulic
system cannot build up high pressure
and convertible top can be moved
manually.
Hydraulic system compontents and
electronics are shown in the
accompanying illustrations.
Terms and definitions used in diagnosing
and repairing the convertible top
hydraulic system are listed in
Table a.
Definition of hydraulic system terms
.
Basic repair procedures for hydraulic
system repair are listed in
Table b.
Convertible top hydraulic system repair
procedures
.
Convertible top
hydraulic components
1
-
Tension bow
(rear of top)
hydraulic