Hydraulic System; Emergency Lowering - Bosch VLS 5140 Erstinbetriebnahme

en 64 | VLS 5140 | Hydraulic System
9.

Hydraulic System

9.1 Lifting platforms without wheel-free
scissor lift
Fig. 36: Hydraulics diagram
1 Hydraulic cylinder for runway
2 Hydraulic unit (G1/2" connections)
3 Lowering restrictor
4 Bypass valve (2/2-way seat valve, 24 V AC, 20 l/min)
5 Flow control valve (set to 6 l/min)
6 Connection for pressure measurement (G1/4")
7 Lowering valve (2/2-way seat valve, 24 V AC, 20 l/min)
8 Non-return valve
9 Pressure limiter (set to 360 bar)
10 Double gear pump (330 bar, 5 l/min)
11 Electric motor (5.5 kW, 3,000 rpm)
12 Intake filter
13 Filler bleeder cap
14 Fluid tank (usable tank volume 12 l)
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9.2 Lifting platforms with wheel-free
scissor lift
Fig. 37: Hydraulics diagram (with wheel-free scissor lift)
15 Hydraulic cylinder for wheel-free scissor lift
16 Throttle non-return valve
17 Runway/wheel-free scissor lift switching valve (3/2-way valve)
9.3

Emergency lowering

If the power supply fails, a raised vehicle can be
lowered using the emergency lowering function.
!
Emergency lowering must only be performed by
specially trained personnel.
1. Deploy a second person to monitor the lowering
process.
2. Block the detent lock so that it cannot engage
in the toothing during the lowering process.
3. Unscrew the front panel of the operating unit.
4. Make sure that no persons or objects are in the
hazardous area.
5. Carefully turn the rotary knob at lowering valve Y3
to open it.
 The lifting platform lowers.
6. Once the lowering process is complete, turn the
rotary knob at lowering valve Y3 to close it again.
Robert Bosch GmbH