MAHA DUO CM 4.2 A, DUO CM, DUO CM 5.0 U, DUO CM 4.2 U, DUO CM 5.0 A Original Operating Instructions

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DUO CM

Scissors Lift

Original Operating Instructions

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Safety .................................................................................................................. 5

Description ........................................................................................................ 11

Transport and Storage ....................................................................................... 14

Installation and Initial Operation ........................................................................... 14

Operation .......................................................................................................... 14

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Contents

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

1.2 Symbols ................................................................................................................... 5

1.3 Intended Use ........................................................................................................... 5

1.4 Inappropriate Use ..................................................................................................... 5

1.5 Requirements on Operating and Service Personnel .................................................. 5

1.6 Safety Instructions for Commissioning ...................................................................... 6

1.7 Safety Instructions for Operation............................................................................... 6

1.8 Safety Instructions for Servicing ................................................................................ 8

1.9 Safety Instructions for Handling Hydraulic Fluid ......................................................... 8

1.10 What to Do in the Event of Defects or Malfunctions .................................................. 9

1.11 What to Do in the Event of an Accident .................................................................... 9

1.12 Safety Features ........................................................................................................ 9

2.1 General Information ................................................................................................ 11

2.2 Specifications ......................................................................................................... 11

2.3 Sample Nameplate ................................................................................................. 13

5.1 Main Switch ........................................................................................................... 14

5.2 Controls and Indicators .......................................................................................... 15

5.3 Display Codes ........................................................................................................ 16

5.4 Using Support Blocks ............................................................................................ 16

5.4.1 Stacking Two Blocks on Top of Each Other ........................................................... 19

5.5 Raising ................................................................................................................... 19

5.6 Lowering ................................................................................................................ 20

5.7 Wheel-Free Jack (Optional) ..................................................................................... 20

5.8 Hydraulic Inclination ............................................................................................... 21

5.9 Routing the Manual Lowering Rope on Lifts with Power Unit in Middle Platform ...... 22

5.9.1 Manual Lowering Rope with 5.5 kW Unit in Middle Platform ................................... 22

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

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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

11 Company Information ........................................................................................... 46

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Safety

1.1

Introduction

1.2

Symbols

1.3

Intended Use

1.4

Inappropriate Use

1.5

Requirements on Operating and Service Personnel

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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

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safety instructions are not covered by the product liability regulations.

Important safety instructions. Failure to comply with instructions could result in personal injury or property damage.

Important information.

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• 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 manu-

facturer. In case of non-compliance the declaration of conformity becomes

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void.

Any use other than described is inappropriate, for example:

• Climbing on the lift supports

• Transporting persons on the lift supports

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• Usage as mobile work platform or for other lifting operations

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

• be mentally and physically suited for these activities,

• be at least 18 years old,

• be trained and instructed in writing,

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1.6

Safety Instructions for Commissioning

1.7

Safety Instructions for Operation

• 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

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in such equipment.

• The lift shall be installed and commissioned by authorised service personnel on-

ly.

• 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

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

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range of 5…40 °C (41…104 °F).

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• 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 us-

ing the lift.

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

unobstructed view to the complete working area and the emergency stop can be accessed at all times.

• All structural parts of the equipment must be visually checked at regular inter-

vals.

• 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.

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• 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 pro-

tection when raising or lowering the lift.

• 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

devices 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

support block only for each support point.

• Lifts with support arms or swing arm jack: check arm restraints for secure en-

gagement 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 con-

tact.

• 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 lowering 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 low-

ering.

• Keep lift and vehicle free of tools and parts.

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

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1.8

Safety Instructions for Servicing

1.9

Safety Instructions for Handling Hydraulic Fluid

• 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.

• 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

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tools.

• 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

setup 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 quali-

fied 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.

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• Do not replace or override the safety devices.

• 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 per-

sists, 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

1.11

What to Do in the Event of an Accident

1.12

Safety Features

Dead Man's Type Control

Roll-off Protection

Longitudinal Light Barriers as Pinch Point Protection (Option)

CE Stop

Measuring System for Runway Synchronization

Pressure Relief Valve

Seat Valves

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• 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

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service.

• 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.

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• Remain calm and answer any questions that may arise.

The operator is required to hold the control in the engaged position to initiate and maintain a particular operation.

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

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.

The lift stops shortly before reaching bottom position. The lift can be lowered completely by pressing the LOWER button again. An audible signal sounds until the lift has reached its lower end position.

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.

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

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.

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

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in the hydraulic system or cylinder leakage.

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Description

2.1

General Information

2.2

Specifications

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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

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system.

DUO CM 4.2 A DUO CM 4.2 U

Fuse (time-delay) 16 A

Working temperature range 5…40 °C

Drive-on height (surface-mounted), w/o accessories

240 mm ---

Working pressure 190 bar

Installation depth --- 250 mm

Runway width 617 mm

Runway height 126 mm

Runway length 4400 mm

Overall width 2075 mm

Overall length 5900 mm 4400 mm

Weight including power unit 2650 kg

Shipping weight 2700 kg

Lifting height max. 2075 mm

Full travel 1850 mm

Raising time, load-dependent approx. 40 s

Hydraulic power unit 2.5 kW

Hydraulic fluid qty. 40 l

Noise emission < 70 dB(A)

Mains frequency 50 Hz

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DUO CM 4.2 A DUO CM 4.2 U

Mains voltage 400 V

Phases 3

Pinch point protection Audible signal "CE Stop"

Lowering time, load-dependent approx. 40 s

Load capacity 4200 kg

Load capacity of wheel-free jack 3500 kg

Shipping dimensions W x H x L 800 x 800 x 4500 mm

DUO CM 5.0 A DUO CM 5.0 U

Fuse (time-delay) 16 A

Working temperature range 5…40 °C

Drive-on height (surface-mounted), w/o accessories

290 mm ---

Working pressure 190 bar

Installation depth --- 300 mm

Runway width 630 mm

Runway height 176 mm

Runway length 5200 mm

Overall width 2210 mm

Overall height 290 mm

Overall length 6800 mm 5200 mm

Weight including power unit 3000 kg

Shipping weight 3200 kg

Lifting height max. 2140 mm

Full travel 1850 mm

Raising time, load-dependent approx. 50 s

Hydraulic power unit 2.5 kW

Hydraulic fluid qty. 40 l

Noise emission < 70 dB(A)

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2.3

Sample Nameplate

DUO CM 5.0 A DUO CM 5.0 U

Mains frequency 50 Hz

Mains voltage 400 V

Phases 3

Pinch point protection Audible signal "CE Stop"

Lowering time, load-dependent approx. 40 s

Load capacity 5000 kg

Load capacity of wheel-free jack 3500 kg

Shipping dimensions W x H x L 800 x 800 x 5300 mm

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Lifts of this series have one large and one small nameplate each at the control desk and at the hydraulic power unit. In the event of customer complaints, hotline requests or spare parts orders, serial number and YoM of the lift should always be indicated.

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SCISSORS LIFT Ser. No. / Date of Production: *** Project: *** Model and Version: *** Supply Voltage: *** Frequency: *** Rated Current: *** Fuse Protection: *** Load Capacity: ***

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BA082901-en

Transport and Storage

Installation and Initial Operation

Operation

5.1

Main Switch

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Check package to ensure it is complete, in accordance with the order confirmation. Report any transport damage to the carrier immediately.

During loading, unloading and transport always use suitable lifting equipment, material handling equipment (e.g. cranes, forklifts, etc.) and the right load handling attachments and slings. Always ensure that the parts to be transported are suspended or loaded properly so that they cannot fall, taking into account size, weight and the centre of gravity.

Store the packages in a covered area, protected from direct sunlight, at a low humidity and with temperatures between 0...+40 °C (32…104 °F). Do not stack packages.

When unpacking, take care to avoid any possibility of injury or damage. Keep at a safe distance when opening the package strapping, do not allow any parts to fall

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out.

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Installation and initial operation of the equipment may be done only by authorized and trained service technicians provided by the manufacturer, licensed dealers or

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service partners.

• Main switch in position 0: Power supply OFF

• Main switch in position 1: Power supply ON

• When in position 0, the main switch can be protected against

tampering by means of a padlock.

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5.2

Controls and Indicators

Function

Short Form

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Raise lift LIFT UP

Lower lift LIFT DOWN

Raise wheel-free jack WFJ UP

Lower wheel-free jack WFJ DOWN

Lower onto locks LOCK

Hydraulic inclination (DUO CM only) F2

Unlock sliding plate (DUO UC only) F1

LED red (Malfunction or Error code)

LED yellow (Warning or Error code)

LED green (Ready for operation)

Illumination

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BA082901-en

5.3

Display Codes

RED

YELLOW

GREEN

5.4

Using Support Blocks

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--- --- Lighting Ready for operation

--- --- Flashing Service interval expired

LED Code

Lighting Flashing ---

Flashing --- Lighting

Flashing Flashing Lighting

Flashing Flashing Flashing

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1 The support blocks are approved for usage on lifts with a rated load capacity of

3,500 kgs.

2 Always use four original MAHA support blocks of identical size and shape.

--- Flashing Lighting

Information message; count flash code, contact service

Error message; count flash code, contact service

Emergency operation, service mode enabled

Emergency operation, service mode enabled, position sensor disabled

Lighting up briefly: Control unit not (yet) enabled

3 Do not use support blocks with cracks, broken-off pieces or other damage. 4 Check that all support blocks and rubber pads are free of oil, grease, dirt or

debris.

5 Place the support blocks under the vehicle manufacturer‘s recommended lift

points. 6 Note correct positioning of the support blocks. 7 Raise the vehicle until the tyres clear the floor. Stop and recheck the lift

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BA082901-en

supports for secure contact with the vehicle body.

A C B B A

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The support block must be placed fully on the surface without extending byond the edges.

A Extension B Support surface; available are:

C Support block

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– Granulate coating – Granulate foil – Rubber plate

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BA082901-en

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Diagonal positioning is permissible only with granulate coated surfaces (a). If

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knobbly pads are used, these must mesh with the support blocks (b).

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5.4.1

Stacking Two Blocks on Top of Each Other

5.5

Raising

free jack

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Only the “DUO“ hard rubber blocks (VZ 975074) and the ductile plastic blocks (VZ

970045) may be stacked on top of each other, but not more than two blocks per

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lifting point.

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• Lift is in bottom position. 1 Center the vehicle on the lift. 2 Protect the vehicle against roll-off (parking brake, chocks). 3 Leave vehicle and stay clear of lift. 4 Press LIFT UP button until the desired height is reached.

• Lift stops once button is released or upper limit stop is reached.

When the lift is below the pinch point, it can be raised only with the wheelin its defined park position.

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. Eccentric positioning may result in faulty

5.6

Lowering

5.7

Wheel-Free Jack (Optional)

Raising

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Make sure to center the vehicle on the lift measurement.

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•

1 To lower the lift press the LIFT DOWN button until the desired height is

reached.

• Lift briefly raises to disengage the latches from the mechanical locks.

• Lift stops once button is released or lower limit stop is reached. The lift always

stops shortly before bottom position. 2 To lower the lift completely, release the LIFT DOWN button and push it again.

• During lowering of lift an audible signal sounds. 3 Release parking brake, remove chocks and drive the vehicle off the lift.

• When completely lowering the lift, be sure to push the LIFT DOWN button until

the LED of the LOCK button lights up.

• The lift can be fully lowered only when the axle lift is in its home position.

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• Vehicle must be centered over the wheel-free jack. 1 Lift the extensions using the handles and position them under the vehicle lift

points. 2 If required, use additional spacer blocks under the vehicle. 3 Raise the vehicle briefly using button <WFJ UP> and check for secure contact

of the extensions at the vehicle manufacturers' recommended lift points. Then

raise the vehicle to the desired height.

• Raising motion is stopped when button is released or upper limit stop is

reached.

BA082901-en

Lowering

5.8

Hydraulic Inclination

Button F2

LED F2

Runways

1 Use button <WFJ DOWN> to lower the wheel-free jack.

• Lowering motion is stopped when button is released or lower limit stop is

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reached. An audible warning signal sounds while the jack is lowering.

Apply the parking brake before enabling the runway inclination!

Button F2 is used for controlling the runway inclination. 5 seconds after pushing the button for the last time, the direction of movement can be changed: from "inclined position" to "horizontal position" or vice versa.

If direction "horizontal position" has been selected, the runways will move until they are in a fully horizontal position.

If the lift is positioned above the CE stop level, the runway inclination cannot be operated and lamp F2 is permanently on. If button F2 is pushed, the lamp goes off.

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Not pushed Off Do not move

Pushed On Move to inclined position

Pushed Flashing briefly Move to horizontal positon

Not pushed On Do not move

Pushed Off Do not move

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Below CE stopp

Above CE stop

BA082901-en

5.9

Routing the Manual Lowering Rope on Lifts with Power Unit in Middle Platform

5.9.1

Manual Lowering Rope with 5.5 kW Unit in Middle Platform

IMPORTANT: Avoid

mechanical stress (no strain) when fastening!

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1 When commissioning for the first time, remove the wire rope from the lowering

valve +C-M2 in direction of the pull.

2 Remove the wire rope from the middle platform at the side, and guide it below

the lifting floor. 3 Wind the end of the wire rope to a loop. Fasten the wire rope loop to the inside

of the lift floor plate with a cable and an adhesive clamp.

4 When using the emergency lowering device, remove the wire rope from the

attachment and leave the hazard area. Activate lowering valve +C-M2 via the

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wire rope.

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This page intentionally blank.

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5.10

Manual Lowering of the Lift

5.10.1

Important Notice Regarding Manual Lowering

Perform actions in the sequence described! The sliding shoes must only be attached

after

the seat valves have been mechanically disabled.

If the lowering procedure needs to be interrupted,

first

remove the sliding shoes and then enable the cylinder’s seat valves. The latches are now in the safety position.

If the lift

and

the wheel-free jack need to be lowered manually,

first

lower the wheel-free jack to the home position. See section 'Manual Lowering of the Wheel-Free Jack'.

After manual lowering, restore the valves to their previous operating state.

5.10.2

Sequence of Actions for Manual Lowering

CAUTION

See in-depth description on the following pages.

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•

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1 Open the seat valves (A) of the main cylinders. 2 Place the sliding shoes (B) underneath the latches. 3 Leave the hazard zone.

: Ensure that actions are performed in this sequence!

4 Actuate the release valves. 5 Close the seat valves of the main cylinders. 6 Remove the sliding shoes.

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Latch engaged Latch disengaged

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5.10.3

Identifying the Hydraulic Power Unit

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Version Power unit Raising/

Identification (Motor nameplate)

Lowering time

1 2.5 kW 40 s / 50 s

2 5.5 kW 20 s / 30 s

3 2x 5.5 kW 12 s / 15 s

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5.10.4

Manual Lowering with 2.5 kW or 5.5 kW Power Unit in the Control Desk

+A-M1

+C-M2

+C-M4.A

+C-M4.B

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1 Open the cap of seat valve

to lose the sealing ring.

2 Remove the coil with plug-in connector from the valve and tighten the cap

(without coil) finger-tight. The seat valve is now disabled.

3 Place the sliding shoe underneath the latch on side +A. You may need to use

the hand pump to do this. After several pumping movements, the latch can be raised by hand. If you use the hand pump, be aware of offset! Raise the sides one after the

other – the valve on the other side must be closed in each case. 4 Repeat steps 1 to 4 for side +B. 5 Use the key ring to pull up lowering valve

aware of offset and hazard zone! To stop the lowering movement, release the

valve.

The height offset should remain < 50 mm – adjust the height of the runways as necessary. Either use the hand pump to raise the lower side or use bypass valve

6 Lower the lift to the home position, remove the vehicle, rectify errors.

(by turning it anticlockwise), making sure not

to lower the higher side.

slowly

. The lift is lowered. Be

7 Raise the lift without any load. 8 Remove the sliding shoes. 9 Attach the coils with plug-in connectors to both seat valves and tighten the

caps finger-tight (by turning them clockwise). The valves have now been

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returned to a functioning state.

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+C-M2

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+A-M1 +B-M1

+C-M4.A

+C-M4.B

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5.10.5

Manual Lowering with 2 × 5.5 kW Power Unit in the Control Desk

Disengage Latch

+C-M5.A / +C-M5.B

+C-M5.A

+C-M5.B

Warning!

+C-M5.A

+C-M5.B

Perform Manual Lowering

+A-M1.A

+B-M1.B

+C-M4.A

+C-M4.B

Warning!

Warning

+A-M1.A

+A-M1.B

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If the latch can be disengaged, continue to point “Perform Manual Lowering”. 1 Use hand pump. Raise the sides one after the other – the seat valve (

the other side must remain active in each case. a) Disable seat valve Unscrew and remove the protective cap from the valve and unscrew the

knurled screw (anticlockwise). b) Disengage latches. Use the hand pump until latch is fully disengaged. c) Enable seat valves Re-screw knurled screw (clockwise), attach protective cap. 2 Repeat actions for other side.

1 Disable seat valves

and

/bring them to an operating state.

(main cylinder).

) on

Be aware of offset!

Unscrew and remove the protective cap from the valve and unscrew the

knurled screw (anticlockwise). 2 Place sliding shoe underneath latches on side +A and +B (main cylinder). 3 Leave hazard zone. 4 Lower the lift. a) Lowering process: Operate bypass stop valves

Be aware of offset throughout entire lowering process! 5 Remove vehicle. 6 Determine cause of fault and rectify it. 7 Raise the lift without any load.

: Lift may lower a few millimetres when the “UP” button is pressed! 8 Remove sliding shoes (main cylinder). 9 Enable seat valves

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Re-screw knurled screw (clockwise), attach protective cap.

and

and/or

manually – lift lowers!

/bring them to an operating state.

BA082901-en

+C-M5.A

+C-M4.B

+C-M4.A

+C-M5.B

Hand pump

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Pos: 98 /-----For ma t-----/MA N UEL LER UMB RUC H Se ite num br uch @ 0\m od_1134403577687_0.docx @ 1277 @ @ 1

BA082901-en

5.10.6

Manual Lowering with 5.5 kW Power Unit in the Middle Platform

+A-M1

+C-M2

+C-M4.A

+C-M4.B

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1 Open the cap of seat valve

to lose the sealing ring.

2 Remove the coil with plug-in connector from the valve and tighten the cap

(without coil) finger-tight. The seat valve is now deactivated.

3 Place the sliding shoe underneath the latch on side +A. You may need to use

the hand pump to do this. After several pumping movements, the latch can be raised by hand. If you use the hand pump, be aware of offset! Raise the sides one after the

other – the valve on the other side must be closed in each case. 4 Repeat steps 1 to 4 for side +B. 5 Use the wire rope to pull lowering valve

lowered. Be aware of offset and hazard zone! To stop the lowering movement,

release the valve.

The height offset should remain < 50 mm – adjust the height of the runways as necessary. Either use the hand pump to raise the lower side or use bypass valve

6 Lower the lift to the home position, remove the vehicle, rectify errors.

(by turning it anticlockwise), making sure not

to lower the higher side.

forwards

slowly

. The lift is

7 Raise the lift without any load. 8 Remove the sliding shoes. 9 Attach the coils with plug-in connectors to both seat valves and tighten the

caps finger-tight (by turning them clockwise). The valves have now been

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returned to a functioning state.

BA082901-en

+C-M2

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+A-M1 +B-M1

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+C-M4.A

+C-M4.B

BA082901-en

5.10.7

Manual Lowering with 2 × 5.5 kW Power Unit in the Middle Platform

Disengage Latch

+C-M5.A / +C-M5.B

+C-M5.A

+C-M5.B

+C-M5.A

+C-M5.B

Perform Manual Lowering

+A-M1.A

+B-M1.B

+C-M4.A / +C-M4.B

+A-M1.A

+A-M1.B

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Pos: 105 /Te ch nisc he D ok umen tati on/H ebe te chn ik/ DUO/ 082 901 DUO C M/ BA/ Inh alt: 08 29 Ma n. Abs enk en - Aggre gat M itt elp lat tfor m C M4 ( Tex t) @ 43\m od_1447683197578_75.docx @ 2341628 @ @ 1

If the latch can be disengaged, continue to point “Perform Manual Lowering”. 1 Use hand pump. Raise the sides one after the other – the seat valve (

the other side must remain active in each case. a) Disable seat valve Unscrew and remove the protective cap from the valve and unscrew the

1 Disable seat valves

and

/bring them to an operating state.

Warning!

(main cylinder).

) on

Be aware of offset!

Unscrew and remove the protective cap from the valve and unscrew the

knurled screw (anticlockwise). 2 Place sliding shoe underneath latches on side +A and +B (main cylinder). 3 Leave hazard zone. 4 Lower the lift. a) Open stopcock (manual lowering control unit). b) Lowering process: Pressing the buttons on the manual lowering control unit causes the bypass

stop valves (

Warning

) to be pneumatically actuated – lift lowers!

: Be aware of offset throughout entire lowering process! c) Close stopcock (manual lowering control unit). 5 Remove vehicle. 6 Determine cause of fault and rectify it. 7 Raise the lift without any load.

Warning!

Lift may lower a few millimetres when the “UP” button is pressed! 8 Remove sliding shoes (main cylinder). 9 Enable seat valves

and

/bring them to an operating state.

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BA082901-en

Re-screw knurled screw (clockwise), attach protective cap.

+C-M5.A

Hand pump

+C-M4.B

+C-M4.A

+C-M5.B

Stopcock

Buttons

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BA082901-en

5.11

Manual Lowering of the Wheel-Free Jack

5.11.1

Manual Lowering of Wheel-Free Jack with 2.5 kW or 5.5 kW Power Unit

+A-M50

+B-M50

+C-M4.A

+C-M4.B

+C-M2

+A-M50.A

+B-M50.B

5.11.2

Manual Lowering of Wheel-Free Jack with 2 x 5.5 kW Power Unit in the Control Desk

+A-M50.A

+B-M50.B

+C-M54.A

+C-M54.B

+A-M50.A

+B-M50.B

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Pos: 110 /Technische Dokum entati on/Alle G eräte/ Übers chrifte n/Über schrifte n 1.1.1/M /Üb erschrif t 1.1. 1: Man uelles A bsenken des Radfrei hebers m it 2 ,5 kW- oder 5,5 k W-A ggre gat @ 35\mod_1390480658747_75.docx @ 1881372 @ 2 @ 1

Pos: 111 /Te ch nisc he D ok umen tati on/H ebe te chn ik/ DUO/ 082 901 DUO C M/ BA/ Inh alt: 082 9 Ma n. Ab senk en - R FH C M1/ 2 ( Tex t) @ 43\mod_1448439353242_75.docx @ 2349777 @ @ 1

1 Disable seat valves

Screw in knurled screw (clockwise).

2 If excessive offset is present, use

side.

3 Use key ring to pull up release valve

lowered. Be aware of offset and hazard zone! To stop the lowering movement,

release the key ring. 4 Enable seat valves Unscrew knurled screw (anticlockwise). 5 Remove vehicle.

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Pos: 113 /Te ch nisc he D ok umen tati on/H ebe te chn ik/ DUO/ 082 901 DUO C M/ BA/ Inh alt: 08 29 Ma n. Absenk en - RFH P ul t CM 4 ( Text) @ 43\mod_1448438979217_75.docx @ 2349627 @ @ 1

6 Determine cause of fault and rectify it.

1 Disable seat valves Screw in knurled screw (clockwise).

and

(wheel-free jack cylinder).

slowly

to lower the higher

. The wheel-free jack is

/bring them to an operating state.

(wheel-free jack cylinder).

2 Lower wheel-free jack. a) Lowering process: Actuate bypass stop valve

jack lowers!

Warning

: Be aware of offset throughout entire lowering process! b) Enable seat valves Unscrew knurled screw (anticlockwise). 3 Remove vehicle. 4 Determine cause of fault and rectify it.

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and

and/or

manually – wheel-free

/bring them to an operating state.

BA082901-en

+A-M50.A

+B-M50.B

+C-M54.A / +C-M54.B

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BA082901-en

5.11.3

Manual Lowering of Wheel-Free Jack with 2 x 5.5 kW Power Unit in the Middle Platform

+A-M50.A

+B-M50.B

+C-M54.A / +C-M54.B

+A-M50.A

+B-M50.B

Pos: 117 /Technische Dokum entati on/Alle G eräte/ Übers chrifte n/Über schrifte n 1.1.1/M /Üb erschrif t 1.1. 1: Man uelles A bsenken des RFH m it 2 x 5, 5 kW- Aggr ega t in d er M it telp la ttfor m @ 43\mod_1447689539149_75.docx @ 2341996 @ 3 @ 1

Pos: 118 /Te ch nisc he D ok umen tati on/H ebe te chn ik/ DUO/ 082 901 DUO C M/ BA/ Inh alt: 08 29 Ma n. Abs enk en - R FH M it telp lat tfor m C M4 ( Tex t) @ 43\m od_1448438874089_75.docx @ 2349530 @ @ 1

1 Disable seat valves Screw in knurled screw (clockwise). 2 Lower wheel-free jack. a) Open stopcock (manual lowering control unit). b) Lowering process: Targetedly pressing the buttons on the manual lowering control unit causes the

bypass stop valves ( wheel-free jack lowers!

Warning

: Be aware of offset throughout entire lowering process! c) Enable seat valves Unscrew knurled screw (anticlockwise). d) Close stopcock (manual lowering control unit). 3 Remove vehicle.

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4 Determine cause of fault and rectify it.

and

(wheel-free jack cylinder).

) to be pneumatically actuated –

/bring them to an operating state.

BA082901-en

+A-M50.A

+B-M50.B

Stopcock

Buttons

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Pos: 121 /-----For mat- ----/MA NUELLE R UMBR UCH Seitenum bruch @ 0\mod_1134403577687_0.docx @ 1277 @ @ 1

BA082901-en

Maintenance

6.1

Maintenance Schedule

Interval

Maintenance items

Procedure

Check fluid for soiling and aging, replace

6.2

Annual Inspection

12 (twelve) months

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Danger! Electric shock hazard! Before doing any maintenance work, turn off the main switch and protect it

against tampering.

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Pos: 125 /Te chnis che D okum enta tion/H ebe techn ik/- Arch iv -/0 8 Schere n-Heb eb ühnen/ 000 1 Scher en-H ebeb ühne n Al le/Inh alte/ Inha lt: I nstand hal tungsp la n Scher en-H BZ_12p t @ 50\m od_ 150 349 419 499 5_75.d oc x @ 292 652 2 @ @ 1

3 months

Check fluid level, top up if necessary.

Check hydraulic system for leakage.

Hydraulic system

Check power unit for unusual noise during operation, check fastening screws for tight fit.

6 months Hydraulic fluid

12 months General inspection Check all components for damage.

6 years Pressure hoses Replace pressure hoses.

Pos: 126 /Tech nische Dok umen tati on/P apierk orb /Über schri ften/ Über schr ift 1.1: J ährl iche Überp rüfu ng @ 6\m od_117 4482 24571 8_75.d ocx @ 768 17 @ 1 @ 1

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• The maintenance interval prescribed by the manufacturer is

• Maintenance work shall be done only by authorized and trained service techni-

Sliding blocks, sliding tracks and sliding surfaces of extensions

Check if sliding blocks have reached their wear limit, replace as required. Slightly grease the sliding tracks and sliding surfaces of the extensions.

if necessary.

This maintenance interval refers to normal workshop usage. If the equipment is used more frequently or under severe operating conditions (e.g. outdoors), the interval must be reduced accordingly.

cians provided by the manufacturer, licensed dealers or service partners.

• In case of non-compliance the manufacturer's warranty becomes void.

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BA082901-en

6.3

Replacing the Filter Element

6.4

Care Instructions

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The filter element of the return flow filter must be replaced as required, but at least

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once per year, by an authorised service technician.

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• Periodically clean the equipment and treat it with a care product.

• Repair damage to the paintwork immediately to prevent corrosion.

• Usage of caustic cleaning agents or high pressure and steam jet cleaners may

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lead to equipment damage.

Regular care and maintenance is the key condition for functionality and long life expectancy of the equipment!

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BA082901-en

6.5

Checking the Fluid Level

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1 Lower lift and wheel-free jack into bottom position. 2 Check the fluid level (see label on power unit). 3 Open the filler neck and top up the reservoir. For specification and fluid quantity

see label on power unit.

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4 Also perform a visual check of all hydraulic pipes and hoses.

• Replace the hydraulic fluid periodically, depending on aging, soiling and water

absorption.

• When topping up, use fluid with the same specification only.

• If the lift is operated permanently at an ambient temperature of < 15 °C (59 °F),

use hydraulic fluid with a lower viscosity.

• The pressure hoses should be replaced as required, but after six years at the

latest.

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BA082901-en

6.6

Wearing Parts

6.6.1

Checking the Sliding Blocks in the Base Tub

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Regularly check all four sliding blocks for wear (see illustration for wear limit mark).

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Once the wear limit is reached, the sliding blocks must be absolutely replaced.

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BA082901-en

6.7

Greasing Points

6.7.1

Lubrication Points at the Lift

pivot points

A Cylinder Bearings

B Scissors Pins

C Slider Tracks

C C B A A

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Periodically lubricate all

Grease cylinder bearing (bottom) and piston bearing (top) through the lubricator nipples using multipurpose grease. Remove waste grease.

Grease the scissors pins through the lubricator nipples using multipurpose grease. Remove waste grease. (2 scissors pins per lifting unit, 2 lubricator nipples per scissors pin.)

Clean the slider tracks in the base frame and the runway. Grease slightly using

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multipurpose grease.

using spray grease.

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BA082901-en

6.7.2

Lubrication Points at Optional Accessories

Wheel-Free Jack

Axle Play Detector, Model PMS

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Clean the slide tracks in the runway (1) and in the support plate (2) and slightly

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lubricate with multipurpose grease.

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Using a greaser, lubricate with multipurpose grease through the lubrication nipples

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(accessible from bottom side). Remove waste grease.

BA082901-en

6.8

Troubleshooting

Error

Diagnosis

Remedy

6.9

Spare Parts

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Lift does not run.

Lift does not raise.

Main switch turned off. Turn on main switch.

Power failure. Check for cause.

Power cord interrupted. Contact service.

Fuses defective. Contact service.

Motor rotation reverse. Contact service.

Low fluid level. Top up reservoir.

RAISE button defective. Contact service.

Pump intake filter dirty. Contact service.

Rated load cannot be raised.

Lift does not lower.

Lift lowers without control button being pressed.

Lift shows jerky movements.

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To ensure safe and reliable operation, only use original spare parts supplied by the

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equipment manufacturer.

Pressure valve maladjusted.

Contact service.

Pump defective.

LOWER solenoid valve defective.

Contact service.

LOWER button defective.

LOWER solenoid valve incompletely.

Leakage in hydraulic system.

Contact service.

Air in hydraulic system. Contact service.

BA082901-en

Service Lifetime

Dismantling

Disposal

Contents of the Declaration of Conformity

MAHA Maschinenbau Haldenwang GmbH & Co. KG

Model: Designation: Directives: Standards:

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In its standard version, this product is designed for 22,000 load cycles based on EN 1493. The maximum period of normal use in relation to the possible product life expectancy shall be evaluated and scheduled by a qualified person during the

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annual safety inspection.

Decommissioning and dismantling of the equipment may be done only by specially authorized and trained personnel provided by the manufacturer, licensed

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dealers or service partners.

Pay attention to the product and safety data sheets of the lubricant used. Avoid damage to the environment. Should a disposal of the device be necessary it must be done in adherence with locally applicable legal regulations regarding environmental protection. Remove all materials properly sorted out and bring them to a suitable waste disposal service. Collect operating materials such as grease, oils, coolant, solvent-based cleaning fluids etc. in suitable containers and dispose

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of in an environmentally protective manner.

Alternatively, you may take the equipment to a specialised waste management plant to ensure that all components and operating liquids are properly disposed

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of.

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herewith declares as a manufacturer its sole responsibility to ensure that the product named hereafter meets the safety and health regulations both in design and construction required by the EC directives stated below. This declaration becomes void if any change is made to the product that was not

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discussed and approved by named company beforehand.

DUO CM / R-AS40/50CM

Scissors Lift; Rated Load Capacity 4000 / 4200 / 5000 kg

2006/42/EC; 2014/30/EU

DIN EN 1493; DIN EN 60204-1

BA082901-en

11 Company Information

Legal notice based on ISO 16016: The reproduction, distribution and utilization of this document as well as the communication of its contents to others without explicit authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design.

The contents of this edition have been checked with great care. However, errors cannot be fully excluded. Subject to technical change without notice.

Document

Document No.: BA082901-en Approval Date: 2017-08-28

Manufacturer

MAHA Maschinenbau Haldenwang GmbH & Co. KG Hoyen 20 87490 Haldenwang Germany

Phone: +49 8374 585 0 Fax: +49 8374 585 590 Mail: maha@maha.de Web: http://www.maha.de

Service

MAHA Service Center AutomoTec GmbH Maybachstraße 8 87437 Kempten Germany

Phone: +49 8374 585 100 Fax: +49 8374 585 491 Mail: service@automo-tec.com Web: www.automo-tec.com

BA082901-en

MAHA DUO CM 4.2 A, DUO CM, DUO CM 5.0 U, DUO CM 4.2 U, DUO CM 5.0 A Original Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety

Introduction

Symbols

Intended Use

Inappropriate Use

Requirements on Operating and Service Personnel

Safety Instructions for Commissioning

Safety Instructions for Operation

Safety Instructions for Servicing

Safety Instructions for Handling Hydraulic Fluid

What to Do in the Event of Defects or Malfunctions

What to Do in the Event of an Accident

Safety Features

Description

General Information

Specifications

Sample Nameplate

Transport and Storage

Installation and Initial Operation

Operation

Main Switch

Controls and Indicators

Display Codes

Using Support Blocks

Stacking Two Blocks on Top of Each Other

Raising

Lowering

Wheel-Free Jack (Optional)

Hydraulic Inclination

Routing the Manual Lowering Rope on Lifts with Power Unit in Middle Platform

Manual Lowering Rope with 5.5 kW Unit in Middle Platform

Manual Lowering of the Lift

Important Notice Regarding Manual Lowering

Sequence of Actions for Manual Lowering

Identifying the Hydraulic Power Unit

Manual Lowering with 2.5 kW or 5.5 kW Power Unit in the Control Desk

Manual Lowering with 2 × 5.5 kW Power Unit in the Control Desk

Manual Lowering with 5.5 kW Power Unit in the Middle Platform

Manual Lowering with 2 × 5.5 kW Power Unit in the Middle Platform

Manual Lowering of the Wheel-Free Jack

Manual Lowering of Wheel-Free Jack with 2.5 kW or 5.5 kW Power Unit

Manual Lowering of Wheel-Free Jack with 2 x 5.5 kW Power Unit in the Control Desk

Manual Lowering of Wheel-Free Jack with 2 x 5.5 kW Power Unit in the Middle Platform

Maintenance

Maintenance Schedule

Annual Inspection

Replacing the Filter Element

Care Instructions

Checking the Fluid Level

Wearing Parts

Checking the Sliding Blocks in the Base Tub

Greasing Points

Lubrication Points at the Lift

Lubrication Points at Optional Accessories

Troubleshooting

Spare Parts

Service Lifetime

Dismantling

Disposal

Contents of the Declaration of Conformity

11 Company Information