The Bosch VLS 5235 is a type-approved scissor lift designed for lifting passenger and motor vehicles, with both floor-mounted and underfloor versions available. This documentation specifically details the underfloor version, though the above-floor version is technologically identical, differing only in the provision of two drive-on ramps instead of four drive-on flaps.
Function Description:
The VLS 5235 is an electro-hydraulic powered scissor lift primarily composed of two lifting platforms, two auxiliary lifts, and a power unit. Its operation involves a gear pump that, when powered, pushes hydraulic oil to raise the pistons of oil cylinders, causing the scissor arms and platforms to ascend. The lift is designed to allow personnel to stand under the load-bearing elements, but it is not equipped for walking on the lifting platform or conveying people. Its designated use includes lifting passenger/motor vehicles using the runways, lifting vehicles using the auxiliary lift, and for wheel alignment when equipped with sliding plates (optional turntables required).
Important Technical Specifications:
- Rated Load Capacity: 3500 kg
- Length of Platform: 4300 mm
- Width of Vehicle: 1600-2100 mm
- Wheelbase: 2100-3200 mm
- Full Rise Height: 1850 mm
- Full Lowered Height: 330 mm
- Full Rise Time with Load: ≤50s
- Full Lowered Time with Load: ≤30s
- Max Working Hydraulic Pressure: 24 MPa
- Min Working Hydraulic Pressure: 22 MPa
- Max Working Pneumatic Pressure: 8 kg/cm²
- Min Working Pneumatic Pressure: 6 kg/cm²
- Load Capacity of Secondary Lift: 3.5 tons
- Lifting Height of Secondary Lift: 450 mm
- Oil Volume: 18 L
- Motor Capacity: 2.2 kW
- Voltage: 380V, 3-phase
- Current: 4.6A
- Frequency: 50 Hz
- Rotation Speed: 2880 r/m
- IP Rating: 44
- Noise Level: Less than 70 dB during operation.
Safety Devices:
The VLS 5235 incorporates several safety features:
- Lowering Limit Switch of Lifting Platform: Automatically stops lowering at 500mm height, requiring a second button press to continue, accompanied by an alarming buzzer.
- Raising Limit Switch for Lifting Platform: Stops raising at 1850mm height.
- Raising Limit Switch for Auxiliary Lift: Stops raising at 450mm height.
- Tip-up Protection of Lifting Platforms: Prevents tipping if the load is unevenly distributed.
- Tip-up Protection of the Auxiliary Lift: Prevents tipping if the load on the auxiliary lift is unevenly distributed.
- Mechanical Lock for Lifting Platform: Prevents falling due to hydraulic system failure.
- Mechanical Lock for the Auxiliary Lift: Prevents falling due to hydraulic system failure.
- Wheel Retainer: Protects vehicle wheels from rolling off the platform.
- Laser Protection Unit: Prevents rollover by stopping movement if platforms are not synchronized.
- Anti-Surge Valve: Slows falling speed in case of hydraulic hose leakage.
- 24V Operation Voltage: Ensures safety for operators.
Usage Features:
Operation of the VLS 5235 is restricted to authorized, trained personnel aged 18 or older. Vehicles must not exceed the maximum overall weight of 3500 kg, and specific load distribution limits (2:1 for runways, 3:2 for auxiliary lift) must be observed. The lift should only be operated via the supplied operating unit.
Before operation, the runways and auxiliary lift must be fully lowered, and the area around the lift cleared. Vehicles must be driven onto the lift in a straight line, centered on the runways, and secured with the parking brake or by engaging a gear.
To raise the vehicle using runways: Turn the control panel switch to "Lifting platform," and control unit switches to "working" and "infrared on." Press "UP" to lift, then "Safety Lock" to engage mechanical locks.
To lower the vehicle using runways: Press "DOWN I" to lower to 500mm, then "DOWN II" to continue lowering, accompanied by an alarming buzz.
To raise the auxiliary lift: Turn the control panel switch to "Auxiliary lift." Place rubber pads under vehicle pick-up points. Use "UP" to raise platforms, extending them if needed, and ensure pads are correctly positioned. Continue pressing "UP" until the desired height (max 450mm above main lift platform) is reached, then press "Safety Lock."
To lower the auxiliary lift: Turn the control panel switch to "Auxiliary lift." Press "DOWN I" if above 500mm, or "DOWN II" if below 500mm (with alarming buzz), then remove rubber pads.
Maintenance Features:
Maintenance work on electrical equipment must be performed by qualified personnel. Before working under raised components, they must be secured. Damaged load-bearing components must be replaced.
Cleaning: The lift should be cleaned with water and a neutral or slightly alkaline detergent (max 25°C). Solvents, abrasive, acidic, or highly alkaline cleaning agents, and high-pressure or steam cleaners must not be used. A preservative agent is recommended for exposed edges.
Maintenance Schedule:
- Daily: Visual inspection of stickers, drive-on ramps, roll-off guards, electrical wiring, hydraulic system, and detent locks.
- Monthly: Visual inspection of stickers, drive-on ramps, roll-off guards, electrical wiring, hydraulic system, and detent locks. Function test of detent locks and "foot protection" safety level. Cleaning of exposed surfaces and edges. Check fluid level in the hydraulic unit.
- Half-yearly: All monthly checks, plus paintwork care for exposed surfaces and edges, lubrication of moving components, and checking the strength and tightening torque (80 Nm for M16) of shear connectors.
Lubrication: Specific points, including shafts of big and small scissor arms, oil cylinder shafts, and rollers, require regular lubrication.
Hydraulic Fluid: The hydraulic fluid must be changed annually, using only organic hydraulic fluid (e.g., meguin HEES 46).
Inspection Log: An inspection log must be maintained, documenting all checks, including initial commissioning, regular, and exceptional checks, along with certifications.
Troubleshooting: A dedicated section provides remedies for common faults during runway and auxiliary lift operation, emphasizing immediate shutdown and contacting Bosch customer service for unlisted issues or repairs.
Decommissioning: For temporary shutdown, disconnect from mains and lock the master switch. For change of location, transfer all documentation and transport in original packaging. For disposal, disconnect power, dismantle, and sort materials according to regulations. Oils, greases, and oil-containing waste are hazardous to water and must be disposed of properly. The VLS 5235 is subject to European directive 2002/96/EC (WEEE) and must be disposed of separately from household waste via local collection systems.
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