Page 34
Systems Descriptions
Maintenance and
repair procedures
must be performed
as specified by
authorized service
personnel only.
Failure to do so may
result in serious
bodily injury and/or
property damage.
W
A
RNING
General Operation
Electrical
Discontinue lift use
if platform does not
stop automatically at
floor level. Failure to
do so may result in
serious bodily injury
and/or property
damage.
Braun L915 Fully Automatic lifts
are powered by an electric/
hydraulic system operating two
single-acting hydraulic main
cylinders for power up/fold and
gravity unfold/down operation.
This combination reduces battery
drain and helps prevent lift
alignment problems.
The hydraulic system supplies
hydraulic fluid to and from the
cylinders which unfold, lower,
raise and fold the platform. The
hydraulic system operates an
additional single-acting hydraulic
roll stop cylinder which folds
(raises) the outboard roll stop to
the vertical position. A compres-
sion spring unfolds (lowers) the
roll stop to the horizontal (ramp)
position.
Automatic Floor Level Switch-
ing: L915 Series lifts feature
automatic floor level switching.
This feature eliminates the need
for the lift operator to position and
stop the platform at vehicle floor
level when unfolding the platform
from the stowed position and
when raising the platform from
ground level.
Pressing the UNFOLD switch
unfolds the platform from the
stowed position to floor level.
The platform stops automatically
at floor level when fully unfolded.
Pressing the UP switch raises the
platform from the ground level to
floor level. When raising the
platform from ground level, the
platform automatically stops at
floor level when raised fully.
The automatic floor level switch-
ing is controlled by two indepen-
dently adjustable microswitches
(limit switches). See page 37.
Read warning at right! If the lift
platform does not automatically
stop at floor level as outlined,
discontinue lift operation
immediately. Contact your lift
sales representative or call The
Braun Corporation at 1-800-THE
LIFT.
Bridging: The L915 electrical
and hydraulic system incorpo-
rates a bridging feature. This
feature stops the down travel of
the platform if the outboard end of
the platform contacts a raised
surface (such as a curb), prevent-
ing the operator from lowering the
inboard end of the platform
resulting in an unsafe platform
angle.
Power Source: The lift draws its
power from a 12 volt DC battery
(standard models). Special
applications are powered by a 24
volt system.
Ground: The lift electrical
system must be grounded to the
vehicle for proper operation. See
the Chassis Ground Notice on
page 15 of this manual.
Pump Motor: Motor brushes are
not replaceable. The pump
motor must be replaced if the
brushes become worn.
Relay: A relay is an electrically
operated electromagnetic switch
that uses a small current to
control a much larger current.
The L915 electrical system
incorporates the use of one relay
(Bridging Relay).
Circuit Sentry: This manual
reset circuit breaker protects the
system from overloads (100
ampere for 12 volt systems and
70 ampere for 24 volt systems).
The Circuit Sentry is located as
close to the battery as possible
for maximum protection. In event
of failure, wait 60 seconds, then
turn the RESET lever to reset the
breaker.
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