Rotary Lift ML40, Руководство по эксплуатации и техническому обслуживанию

Страница: 35 / 92

Maintenance and inspections
33
Fig. 9-3 Hydraulic
X
Set the «Main lifting unit / Wheel-free lift» control ( Fig. 7-1, page 25 ) to
"Wheel-free lift".
X
Open valves 1 and 2 ( Fig. 9-3, page 33 ) by four revolutions.
X
Detach plug at pos. 1 ( Fig. 9-2, page 32 ). This will deactivate the "top posi-
tion" sensor.
X
Raise the platform to its furthest height.
X
Press the «Lower to latched position» control to set the platform down in the
latched position.
X
Carefully unscrew the bleeder screws (6) on both slave hydraulic cylinders.
The pressure thereby decreases and the oil-air mixture escapes.
X
Screw in the bleeder screws (6) until they are about halfway screwed in
(about 3 revolutions).
X
Carefully operate the «Lift» control (inching mode) until both platforms have
reached the mechanical stop.
X
Press the «Lower to latched position» control for about 1 s to relieve the ex-
cess pressure.
X
Close valves 1 and 2.
X
Press the «Lower» control and lower the platform down completely. The air
thereby escapes from the hydraulic tank. This will generate some noise.
X
Hold the «Lower» control depressed for at least one additional minute.