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Contact The Braun
Corporation before
adjusting hydraulic
pressure relief valve.
Failure to do so may
result in serious
bodily injury and/or
property damage.
WARNING
Relief Valve Adjustment Procedure:
1. Position a 9/16" wrench onto the hex nut retaining
the Allen screw. Insert a 3/16" Allen wrench into
the Allen screw. Secure the Allen screw and loosen
the hex nut.
Do not
remove nut or Allen screw.
2. Place load on platform (equal to weight not lifting).
3. Hold the hex nut and turn the Allen screw clockwise
until pump lifts the load. Turn the Allen screw in an
additional 3/4 turn, then unscrew it 1/4 turn. This
action ensures that relief valve protection has not
been adjusted out of the system.
4. Secure the Allen head screw and tighten the hex
nut retainer (locking nut)
securely
.
L
Relief Valve (Pump Cover Removed)
Cylinder Mounted Flow
Control Valves (pressure
compensators):
L915 Series
lift models are equipped with two
external flow control valves (one
for each lift main cylinder). This
device is sized to allow unre-
stricted hydraulic fluid to flow in
and out of the lift cylinders
during normal operation. The
valve meters a limited rate of oil
flow from the lift cylinders in the
event there is an external
hydraulic fluid leak between the
cylinders and the pump, (pre-
venting rapid platform descent).
This is a nonadjustable fixed
valve. The arrow on the valve
points toward the pump (hex nut
toward the cylinder).
Pressure Relief Valve:
This
adjustment on the pump unit limits
the maximum oil pressure in the
system to a safe level. It also
keeps the amp draw and battery
drain at a minimum when the
cylinders reach full stroke. The
M268 pressure relief valve is
preset at 2100 psi.
Do not
tamper with this adjustment
unless absolutely necessary (will
not lift load) and then,
only
after
contacting The Braun Corpora-
tion.
Relief Valve Access:
The pump
module cover must be removed
to access the relief valve (access
hole not provided).
Allen Screw
Hex Nut
drive, turn the adjustment screw clockwise 1/16 to
1/8 turn at a time.
Note:
Press the OUT (Unfold)
switch to return the platform to floor level before
each adjustment. Press the IN (Fold) switch to
test operation following each adjustment. Repeat
until the pump starts cycling on and off, folding the
platform.
Return the platform to floor level, reposition
(center) the weight and turn the adjustment screw
counterclockwise 1/16 to 1/8 intervals until the
weight shuts the pump off. Proceed to Step 5.
4. The pump did not shut off or skipped (cycled on
and off). The pressure switch must be adjusted to
a positive shutoff with the 75 pound load. Return
the platform to floor level and reposition (center)
the weight. Using a 3/32" hex drive, turn the
adjustment screw counterclockwise 1/16 to 1/8
intervals until the weight shuts the pump off.
Note:
Press the OUT (Unfold) switch to return the
platform to floor level before each adjustment.
Press the IN (Fold) switch to test operation
following each adjustment. Proceed to Step 5.
5. Test the Fold function with an empty platform.
The platform should fold without any hesitation or
“skipping.” If it does hesitate, inspect and lubri-
cate the lift pivot points. Excessive friction at the
pivot points can cause hesitation when folding.
