Maintenance and inspections
35
Aerating the hydraulic system of the wheel-free lift (LT/LTAT version only)
Fig. 9-4 Bleeding screw on wheel-free lift
X
Lower the wheel-free lift.
X
Move the main lifting unit to a midway working position and set it down on the
safety latches.
X
Carefully unscrew the hydraulic hoses (which may still be under pressure)
from the wheel-free lift cylinders and place in a suitable collection container.
X
Switch off the synchronisation monitor (turn on switch S9 in the control col-
umn). The control light flashes.
X
Set the «Main lifting unit / Wheel-free lift» control (
) to
"Wheel-free lift".
X
Press the «Lift» control until oil flows from the hose without bubbles.
X
Attach the hydraulic hose on the piston side (bottom connection) of the mas-
ter cylinder.
X
Press the «Lift» control; the master wheel-free lift raises. Carefully move it
into the end position.
X
Switch on the filling valve Y7 (switch S8 in the control column). The control
light flashes.
X
Press the «Lift» control until oil flows out of the hoses; the master/slave con-
nection hoses are filled.
X
Mount the hydraulic hoses on the cylinder (master/slave connection).
X
Press the «Lift» control; the slave wheel-free lift raises. Carefully move it into
the end position. Oil may run out of the upper line as it is raised.
X
Switch off the filling valve Y7 (switch S8 in the control column).
X
Press the «Lower to latched position» control; the wheel-free lifts lower into
the latched position.
X
Place a suitable collection container under the master cylinder.
X
Carefully unscrew the bleeder screw on the master cylinder. A mixture of oil
and air escapes and the slave wheel-free lift lowers into the latched position.
X
Screw in the bleeder screw halfway.
X
Carefully operate the «Lift» control (inching mode) until oil flows out of the
cylinder, then carefully continue raising it until the upper stop is reached.
X
Switch on the filling valve Y7 (switch S8 in the control column). The control
light flashes since the synchronisation monitor (switch S9) is still switched off.
Summary of Contents for ML40
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