Maha Duo cm series User manual

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DUO CM

Scissors Lift

Original Operating Instructions

BA082901-en

2020-01-24

The reproduction, distribution and utilization of this document as well as the communication of its con-

tents to others without explicit authorization is prohibited. Offenders will be held liable for the payment of

The contents of this edition have been checked with great care. However, errors cannot be fully excluded.

Subject to technical change without notice.

Manufacturer

MAHA Maschinenbau Haldenwang GmbH & Co. KG

Hoyen 20

87490 Haldenwang

Germany

Phone: +49 8374 585-0

Fax: +49 8374 585-590

Mail: [email protected]

Web: www.maha.de

Service

MAHA SERVICE CENTER

Maybachstraße 8

87437 Kempten

Germany

Phone: +49 8374 585-100

Fax: +49 8374 585-491

Mail: service@maha.de

Web: www.mahaservicecenter.de

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Contents

1Safety.............................................................................................................................5

1.1Introduction...........................................................................................................................5

1.2SymbolsandSignalWords.....................................................................................................5 

1.2.1PersonalInjury.......................................................................................................................5

1.2.2PropertyDamage...................................................................................................................5

1.2.3Information............................................................................................................................5

1.3IntendedUse..........................................................................................................................6

1.4InappropriateUse..................................................................................................................6

1.5RequirementsonOperatingandServicePersonnel..............................................................6

1.6SafetyInstructionsforCommissioning..................................................................................7

1.7SafetyInstructionsforOperation..........................................................................................7

1.8SafetyInstructionsforServicing............................................................................................9 

1.9SafetyInstructionsforHandlingHydraulicFluid...................................................................9

1.10WhattoDointheEventofDefectsorMalfunctions..........................................................10

1.11WhattoDointheEventofanAccident..............................................................................10

1.12SafetyFeatures....................................................................................................................11

2Description...................................................................................................................12

2.1GeneralInformation............................................................................................................12

2.2Specifications.......................................................................................................................12

2.2.1DUOCM4.2A/U..................................................................................................................12

2.2.2DUOCM5.0A/U..................................................................................................................12

2.2.3DUOCM5.5U......................................................................................................................13

2.3SampleNameplate...............................................................................................................14

3TransportandStorage..................................................................................................15

4InstallationandInitialOperation..................................................................................15

5Operation.....................................................................................................................15

5.1MainSwitch.........................................................................................................................15

5.2ControlsandIndicators........................................................................................................16

5.3DisplayCodes.......................................................................................................................17

5.4UsingSupportBlocks...........................................................................................................17

5.4.1StackingTwoBlocksonTopofEachOther..........................................................................20

5.5Raising..................................................................................................................................20

5.6Lowering..............................................................................................................................21

5.7Wheel‐FreeJack(Optional).................................................................................................21

5.8HydraulicInclination............................................................................................................22

4

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5.9RoutingtheManualLoweringRopeonLiftswithPowerUnitinMiddlePlatform.............23

5.9.1ManualLoweringRopewith5.5kWUnitinMiddlePlatform............................................23

5.10ManualLoweringoftheLift.................................................................................................24

5.10.1ImportantNoticeRegardingManualLowering...................................................................24

5.10.2SequenceofActionsforManualLowering..........................................................................24

5.10.3IdentifyingtheHydraulicPowerUnit..................................................................................25

5.10.4ManualLoweringwith2.5kWor5.5kWPowerUnitintheControlDesk.........................26

5.10.5ManualLoweringwith2×5.5kWPowerUnitintheControlDesk....................................28

5.10.6ManualLoweringwith5.5kWPowerUnitintheMiddlePlatform....................................30

5.10.7ManualLoweringwith2×5.5kWPowerUnitintheMiddlePlatform..............................32

5.11ManualLoweringoftheWheel‐FreeJack...........................................................................34

5.11.1ManualLoweringofWheel‐FreeJackwith2.5kWor5.5kWPowerUnit.........................34

5.11.2ManualLoweringofWheel‐FreeJackwith2x5.5kWPowerUnitintheControlDesk....34

5.11.3ManualLoweringofWheel‐FreeJackwith2x5.5kWPowerUnitintheMiddlePlatform...

 .............................................................................................................................................36

6Maintenance.................................................................................................................38

6.1MaintenanceSchedule........................................................................................................38

6.2AnnualInspection................................................................................................................38

6.3ReplacingtheFilterElement................................................................................................39

6.4CareInstructions..................................................................................................................39

6.5CheckingtheFluidLevel......................................................................................................40

6.6WearingParts......................................................................................................................41

6.6.1CheckingtheSlidingBlocksintheBaseTub........................................................................41

6.7GreasingPoints....................................................................................................................42

6.7.1LubricationPointsattheLift................................................................................................42

6.7.2LubricationPointsatOptionalAccessories.........................................................................43

6.8Troubleshooting...................................................................................................................44

6.9SpareParts...........................................................................................................................44

7ServiceLifetime............................................................................................................45

8Dismantling...................................................................................................................45

9Disposal........................................................................................................................45

10ContentsoftheDeclarationofConformity...................................................................45

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BA082901-en

1Safety

1.1 Introduction

Thoroughly read this manual before operating the equipment and comply with the

instructions. Always display the manual in a conspicuous location.

Personal injury and property damage incurred due to non-compliance with these

safety instructions are not covered by the product liability regulations.

1.2 Symbols and Signal Words

1.2.1 Personal Injury

DANGER

indicates an immediate hazard which, if not avoided, will result in death or severe per-

sonal injury.

WARNING

indicates a potential hazard which, if not avoided, could result in death or severe per-

sonal injury.

CAUTION

indicates a potential hazard which, if not avoided, could result in moderate or minor

personal injury.

1.2.2 Property Damage

NOTICE

indicates a potentially harmful situation which, if not avoided, could result in damage

to the equipment or surrounding objects.

1.2.3 Information

indicates important information notes.

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1.3 Intended Use

This lift shall be used exclusively for the safe lifting of motor vehicles. Observe the

rated load capacity and load distribution.

The lift shall not be modified without the express written consent of the manufac-

turer. In case of non-compliance the declaration of conformity becomes void.

1.4 Inappropriate Use

WARNING

Any use other than described is inappropriate, for example:

Climbing on the lift supports

Transporting persons on the lift supports

Usage as mobile work platform or for other lifting operations

1.5 Requirements on Operating and Service Personnel

WARNING

All persons employed in the operation, maintenance, installation, removal and disposal

of the device must

be at least 18 years old,

be mentally and physically suited for these activities,

be demonstrably trained and instructed in writing,

have read and understood the operating instructions, especially the instructions

what to do in the event of defects or malfunctions,

be on record as having been instructed in safety guidelines,

have practical experience in working with vehicle lifts and the hazards inherent in

such equipment.

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1.6 Safety Instructions for Commissioning

WARNING

The lift shall be installed and commissioned by authorised service personnel only.

Use personal protective equipment.

All safety features must be checked for proper function at commissioning.

The control desk (if present) shall not be installed in the danger zone of the lift.

The standard lift version shall not be installed and commissioned in hazardous loca-

tions, outdoors, in moist rooms (e.g. car wash) or outside a temperature range of

5…40 °C (41…104 °F).

1.7 Safety Instructions for Operation

WARNING

Observe the detailed operating instructions.

Observe all accident prevention regulations.

Use personal protective equipment.

The standard lift version shall not be operated in hazardous locations, outdoors, in

moist rooms (e.g. car wash) or outside a temperature range of 5…40 °C (41…104 °F).

To ensure safe operation, check the functionality of all safety devices before using

the lift.

The control desk (if present) must be positioned in such a way that there is an un-

obstructed view to the complete working area and the emergency stop can be ac-

cessed at all times.

All structural parts of the equipment must be visually checked at regular intervals.

Supply of suitable illuminating devices is the owner's/operator's responsibility.

Do not allow anyone to stay in the danger zone when driving on or off the lift.

Lifts with cylinder and runways: when lifting vehicles with a short wheelbase, make

sure that one axle is in front of the lifting cylinder, the other behind it.

Lifts with wheel-free jack: before driving on or off the lift or wheel-free jack, make

sure the jack is in bottom position.

If the operator is unable to see all parts of the danger zone, a trained second person

must monitor such areas.

Center the vehicle on the lift when it is in fully lowered position.

After positioning the vehicle on the lift secure it against roll-off.

Lifts with runways: make sure the vehicle tyres do not contact the roll-off protec-

tion when raising or lowering the lift.

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Lifts with runways: modifications (such as usage of extensions) are permissible only

under the condition that the functionality of the roll-off protection is maintained

(protective position of ≥0.1 m above the runways).

The load rating on the identification plate must not be exceeded.

Keep the path of movement free of obstructions.

Only use the vehicle manufacturer's recommended lift points.

Only use lifting supports approved by the vehicle manufacturer.

The vehicle must be lifted as a whole. usage of external hoisting and support devic-

es in combination with the lift must be approved by the manufacturer.

Do not use the lift for transporting persons.

Lifts with support arms or wheel-free jack: when raising the lift, all support points at

the vehicle body must be engaged at the same time.

Lifts with support arms or swing arm jack: use one additional extender or one sup-

port block only for each support point.

Lifts with support arms or swing arm jack: check arm restraints for secure engage-

ment as soon as support arms contact vehicle lift points.

Lifts with wheel-free jack: secure engagement of the vehicle must be ensured by

using appropriate means (e.g. lashing straps).

After raising the vehicle briefly, stop and check the lift supports for secure contact.

Make sure the vehicle doors are closed during raising and lowering cycles.

Make sure the parking brake is applied during raising and lowering cycles.

Closely watch lift and vehicle during raising and lowering cycles.

Do not allow anyone to stay in lift area during raising and lowering cycles.

Lifts with support arms or wheel-free jack: after setting down the vehicle, check the

lift supports for secure contact before raising the vehicle again.

Axle lift (if present): observe the installation instructions. Use both hands when

moving the axle lift. The axle lift must be in park position during raising and lower-

ing cycles.

Axle lift (if present): the vehicle must be additionally secured against rolling off

while one axle is in a raised position.

Do not allow anyone to climb up the lift or the raised vehicle.

Before leaving the lift, fully lower the vehicle or secure it against accidental lower-

ing.

Keep lift and vehicle free of tools and parts.

Keep the lift and lift area clean. Risk of slippage on oily floors!

The main switch serves as emergency stop switch. In case of emergency turn it to

“0”.

Protect the lift against unauthorized usage by padlocking the main switch.

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Protect all parts of the electrical equipment from humidity.

Use caution with operating vehicle engines. Danger of poisoning!

When removing heavy vehicle components, the centre of gravity can change. In

such circumstances appropriate action must be taken as required.

Residual risk: Tripping over runways of surface mounted lifts, tripping over tools.

1.8 Safety Instructions for Servicing

WARNING

Use personal protective equipment.

Service work must be done by authorized service technicians.

Turn off and padlock the main switch before doing any repair, maintenance or set-

up work.

The system must be unpressurized during maintenance work.

Work on pulse generators or proximity switches must be done by authorized service

technicians.

Work on the electrical equipment must be done by service technicians or qualified

electricians.

Ensure that ecologically harmful substances are disposed of in accordance with the

appropriate regulations.

Do not use high pressure or steam jet cleaners. Do not use caustic cleaning agents.

The lift's safety devices must be set by authorized service technicians.

Do not replace or override the safety devices.

1.9 Safety Instructions for Handling Hydraulic Fluid

CAUTION

Neutralize hydraulic fluid spills with binder.

Remove contaminated clothing immediately.

Inhalation: If symptoms persist, seek medical treatment.

Skin contact: Wash skin immediately with soap and water. If skin irritation persists,

seek immediate medical advice.

Eye contact: Rinse thoroughly with water and seek medical advice.

Ingestion: Do not induce vomiting. Seek immediate medical attention.

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1.10 What to Do in the Event of Defects or Malfunctions

WARNING

In case of defects or malfunctions such as uncontrolled lift movement or defor-

mation of the superstructure, support or lower the lift immediately.

Turn off the main switch and secure it against unauthorized usage. Contact service.

1.11 What to Do in the Event of an Accident

The injured person is to be removed from the danger area. Find out where dressing

and bandages are kept. Seek first-aid.

Provide first-aid (stop bleeding, immobilise injured limbs), report the accident and

seal off the accident site.

Immediately report any accident to your supervisor. Make sure a record is kept of

every occasion first-aid is provided, e.g. in an accident book.

Remain calm and answer any questions that may arise.

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1.12 Safety Features

Dead Man's Type Control

The operator is required to hold the control in the engaged position to initiate and

maintain a particular operation.

Roll-off Protection

Once the runways are raised, the approach ramps rise and act as chocks.

Longitudinal Light Barriers as Pinch Point Protection (Option)

The outside edges of the runways are equipped with light barriers. Once the light

beam is interrupted, the lift stops immediately.

After the error has been corrected, the hazard point is always enabled first by raising

the lift.

CE Stop

The lift stops shortly before reaching bottom position. The lift can be lowered com-

pletely by pressing the LOWER button again. An audible signal sounds until the lift has

reached its lower end position.

Measuring System for Runway Synchronization

Synchronization is achieved through a magnetostrictive measuring system monitoring

the level difference between both runways. Once a preset level difference is exceeded,

the lift stops immediately.

Pressure Relief Valve

The working pressure of the hydraulic system is limited by the pressure relief valve.

Seat Valves

Positive-control seat valves at the hydraulic cylinders prevent sudden lowering

movements of the lift in the event of a rapid pressure drop in the hydraulic system,

e.g. due to line break.

Safety Latch

The safety latch prevents sudden lowering movements caused by a pressure drop in

the hydraulic system or cylinder leakage.

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2Description

2.1 General Information

The lifts of this series are equipped with two runways supported by a scissors

structure. The drive system consists of two hydraulic cylinders with hydraulic power

unit. The lift is operated via an electric dead man's type control using pushbuttons,

synchronization is achieved through a magnetostrictive measuring system.

2.2 Specifications

2.2.1 DUO CM 4.2 A/U

Load capacity CE..................................................................................................... 4200 kg

Load capacity CE with wheel-free jack................................................................... 4200 kg

Lifting height max.................................................................................................2075 mm

Full travel..............................................................................................................1850 mm

Raising/Lowering time, load-dependent ...................................................approx. 40/40 s

DUO CM 4.2 A: Overall dimensions (L x W x H) ............................. 5900 x 2075 x 240 mm

DUO CM 4.2 U: Overall dimensions (L x W x H)............................. 4400 x 2075 x 240 mm

DUO CM 4.2 A: Drive-on height (w/o accessories) ................................................240 mm

DUO CM 4.2 U: Installation depth .........................................................................250 mm

Runway dimensions (L x W x H) ....................................................... 4400 x 617 x 126 mm

Runway length optional.......................................................................................4800 mm

Drive power..............................................................................................................2.5 kW

Working pressure....................................................................................................190 bar

Power supply..................................................................................... 3/N/PE, 400 V, 50 Hz

Fuse (time-delay) .........................................................................................................16 A

Weight.................................................................................................................... 2650 kg

Weight including packaging ................................................................................... 2700 kg

Packaging dimensions (L x W x H).................................................... 4500 x 800 x 800 mm

Hydraulic fluid qty. (not included) ................................................................................ 40 l

2.2.2 DUO CM 5.0 A/U

Load capacity CE..................................................................................................... 5000 kg

Load capacity CE with wheel-free jack................................................................... 5000 kg

Lifting height max.................................................................................................2140 mm

Full travel..............................................................................................................1850 mm

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Raising/Lowering time, load-dependent .......................................................... ca. 50/40 s

DUO CM 5.0 A: Overall dimensions (L x W x H) ............................. 6800 x 2210 x 290 mm

DUO CM 5.0 U: Overall dimensions (L x W x H)............................. 5200 x 2210 x 290 mm

DUO CM 5.0 A: Drive-on height (w/o accessories)................................................290 mm

DUO CM 5.0 U: Installation depth .........................................................................300 mm

Runway dimensions (L x W x H) ....................................................... 5200 x 630 x 176 mm

Drive power..............................................................................................................2,5 kW

Working pressure....................................................................................................190 bar

Power supply..................................................................................... 3/N/PE, 400 V, 50 Hz

Fuse (time-delay) .........................................................................................................16 A

Weight.................................................................................................................... 3000 kg

Weight including packaging ................................................................................... 3200 kg

Packaging dimensions (L x W x H).................................................... 5300 x 800 x 800 mm

Hydraulic fluid qty. (not included) ................................................................................ 40 l

2.2.3 DUO CM 5.5 U

Load capacity CE..................................................................................................... 5500 kg

Lifting height max.................................................................................................2140 mm

Full travel..............................................................................................................1850 mm

Raising/Lowering time, load-dependent .......................................................... ca. 50/40 s

Overall dimensions (L x W x H)....................................................... 5200 x 2210 x 290 mm

Drive-on height (w/o accessories) .........................................................................290 mm

Installation depth...................................................................................................300 mm