MAHA MGH Series User manual

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MGH
Pit Jack
Original Operating Instructions
BA550401-en
MGH 5.5/75
MGH 5.5/45
MGH 11.0/75
MGH 11.0/45
MGH 14.5/75
MGH 14.5/45
MGH 16.5/75
MGH 20.0/75
MGH 30.0/75
MGH 5.5 PD
MGH 14.5 PD

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BA550401-en
BA550401-en
2020-02-04
© MAHA Maschinenbau Haldenwang GmbH & Co. KG
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
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.
Manufacturer
MAHA Maschinenbau Haldenwang GmbH & Co. KG
Hoyen 20
87490 Haldenwang
Germany
Phone: [phone]
Fax: [phone]
Mail: [email protected]
Web: www.maha.de
Service
MAHA SERVICE CENTER
Maybachstraße 8
87437 Kempten
Germany
Phone: [phone]
Fax: [phone]
Mail: [e-mail]
Web: www.mahaservicecenter.de

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Contents
1Safety .............................................................................................................................5
1.1 Symbols and Signal Words.....................................................................................................5
1.1.1 Personal Injury.......................................................................................................................5
1.1.2 Property Damage...................................................................................................................5
1.1.3 Information............................................................................................................................5
1.2 Intended Use..........................................................................................................................6
1.3 Inappropriate Use..................................................................................................................6
1.4 Requirements on Operating and Service Personnel..............................................................6
1.5 Safety Instructions for Operation ..........................................................................................7
1.6 Safety Instructions for Handling Hydraulic Fluid ...................................................................9
1.7 What to Do in the Event of Defects or Malfunctions ............................................................9
1.8 What to Do in the Event of an Accident ................................................................................9
2Description ...................................................................................................................10
2.1 Design and Operating Principle ...........................................................................................10
2.2 Compressed Air Supply........................................................................................................10
2.3 Specifications .......................................................................................................................10
2.4 Sample Nameplate...............................................................................................................11
3Transport and Storage ..................................................................................................11
4Installation and Initial Operation ..................................................................................11
4.1 Assembly of the Carriage Version up to 16.5 t....................................................................12
4.2 Assembly of the Carriage Version above 20 t......................................................................25
5Operation .....................................................................................................................27
5.1 Controls................................................................................................................................27
5.2 Raising and Lowering ...........................................................................................................28
5.3 Checking the Safety Device..................................................................................................28
5.4 General Operating Instructions for Lifting Accessories.......................................................29
6Maintenance.................................................................................................................30
6.1 Annual Inspection ................................................................................................................30
6.2 Care Instructions..................................................................................................................30
6.3 Maintenance by the Operator.............................................................................................31
6.4 Refilling with Hydraulic Fluid ...............................................................................................32
6.5 Spare Parts...........................................................................................................................32
7Service Lifetime ............................................................................................................33
8Dismantling...................................................................................................................33
9Disposal ........................................................................................................................33

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10 Contents of the Declaration of Conformity ...................................................................34

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1Safety
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.
1.1 Symbols and Signal Words
1.1.1 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.
1.1.2 Property Damage
NOTICE
indicates a potentially harmful situation which, if not avoided, could result in damage
to the equipment or surrounding objects.
1.1.3 Information
indicates important information notes.

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1.2 Intended Use
The lift is intended for use in automotive workshops with passenger cars, commer-
cial vehicles, buses, trailers and agricultural vehicles.
Use in potentially explosive areas and outdoors is prohibited. Use in wet or flam-
mable areas is only permitted with the express written permission of the manufac-
turer.
Pit jacks and transmission jacks are lifting devices and are not suitable for holding
the load safely over a longer period. Raised loads must be safely supported in a
suitable manner.
For vehicles that need to be lifted at two points, attachable axle crossmembers are
to be used.
Observe the maximum load carrying capacity set out on the rating plates of pit jack
and load carrying equipment.
The pit jack shall not be modified without the express written consent of the manu-
facturer. In case of non-compliance the declaration of conformity becomes void.
1.3 Inappropriate Use
WARNING
Use in any manner other than that intended is prohibited, such as:
Walking or climbing on the load carrying equipment
Using the load carrying equipment to transport personnel
Use for other lifting work
1.4 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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1.5 Safety Instructions for Operation
WARNING
All loose parts within the package must be safeguarded by trained personnel and
work plans must be adhered to.
Observe transport guidelines. The lifting points are defined and indicated on the
packaging.
Work plans for packaging, suitable transport equipment and lifting accessories must
be available and used during final assembly.
Transport must be by trained personnel using the right special tools.
Note the instructions on the packaging concerning hazards during assembly and
proper handling.
The lift may only be operated by trained personnel over 18 years of age.
The employer is responsible for ensuring that the operator is trained and familiar
with the operating instructions.
The employer must check the safety equipment before use.
The load rating on the identification plate must not be exceeded.
No personnel are allowed in the danger zone when a vehicle is being raised or low-
ered above the lift pit.
The positioning of the lift under the load must be carried out by trained personnel.
The vehicle or vehicle components may only be raised using the designated points.
Shortly after lifting the vehicle, check the lifting points are secure.
Both load and lift are to be monitored by the operator during lifting and lowering.
Personnel are prohibited from travelling on the load or the load carrying equip-
ment.
If the operator is unable to see all parts of the danger zone, a trained second person
must monitor such areas.
During lifting and lowering, no personnel are allowed in the area where either the
lift or the load are in motion.
After the lifting operation has stopped, remove the operating lever of the pump (if
any) and place it in the space provided.
The load should only be raised on its centre of gravity; the vehicle must be able to
reposition itself during lifting and lowering. In this way the load can centre itself
above the lift.
Loads are to be placed on the load carrying equipment so as to prevent any unin-
tended changes in position.
If adjustable pads are present, compensate for any height differences between the
lifting points.
It is not allowed to work under the lifted load until it has been secured by suitable

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means (DIN EN 1494).
The pit jack must always be moved using both hands. If one person is unable to pro-
vide the manual force required, another person should be called upon.
Operators must pay attention to all movements of the pit jack so that they neither
endanger themselves or others.
If the ground is uneven in the area where the pit jack is being used, secure it to pre-
vent it from rolling away.
The use of the pit jack on a surface where the inclination is greater than 6° is pro-
hibited.
No tools or other objects should be left on the loading equipment.
Only move the pit jack in a retracted state when it is carrying a load. Ensure that the
load is lifted at its centre of gravity and is appropriately secured to the load lifting
equipment (e.g. by lashing).
When installing or removing heavy vehicle components (engine / powertrain), the
centre of gravity can change. In such circumstances appropriate action should be
taken before using the pit jack to raise it again, such as determining the centre of
gravity and checking the loading point.
Before lowering, the operator should ensure that there are no objects in the area
where the pit jack and the load are moving.
Do not deliberately swing the lifting equipment.
Because the carriage on the ground is not secured to prevent tipping, placing loads
at the sides is prohibited.
The oil level in the hydraulic system must be regularly inspected by trained staff.
The safety instructions on the pit jack should be examined annually for complete-
ness and legibility.
In the event of a fault occurring, secure the area in which the pit jack and load are
moving. Take the jack out of use and advise the customer service department.
The user must provide suitable lighting at the workplace.
In order to prevent the load from being lifted whilst unattended (possibly as a result
of a leaky valve), when the pit jack is no longer in use, disconnect it from the com-
pressed air supply or shut off the compressed air supply line.
The hydraulic components must be inspected annually.
The pressure relief valve must not be adjusted to be above the manufacturer's spec-
ified value, and may only be altered by authorised personnel.
The system pressure must be monitored regularly using a pressure gauge.
Fault finding and rectification may only be carried out by authorised personnel.
Observe the instructions concerning proper installation and removal in the manual.

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1.6 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.
1.7 What to Do in the Event of Defects or Malfunctions
WARNING
If defects occur, such as the pit jack raising and lowering itself on its own or distor-
tion of the supporting components, immediately lower the lift or provide support.
In case of malfunction or repair disconnect the pit jack from the air supply system.
Turn off the main switch and secure to prevent unauthorized use. Contact the Ser-
vice Department.
1.8 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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2Description
2.1 Design and Operating Principle
These manually operated hydraulic, combined hydraulic / pneumatic or pneumatic pit
jack / axle and transmission jacks are lifting devices for lifting vehicles and power
trains. The pit jacks can be moved in the longitudinal and transverse direction on a
chassis, the axle and transmission jack using a chassis running on the ground using
rollers.
The pump unit includes load valves, suction valves and overload valves. High and low
pressure hand pumps are installed according to the type as per the list of spare parts.
The self-closing countersunk screw is also mounted on the pump block. An overload
system is installed for automatic venting.
The load carrying equipment consists of a supporting plate attachment (support plate /
gearbox support). For more specific loading points on vehicles, other adaptors from
our range of accessories can be attached.
In hydraulic-pneumatic pit jacks with rapid lift control, the oil in the tank is pressurised
with compressed air. The oil is thus displaced and the piston rises quickly to the point
of load.
In the version using an air motor (LM), the motor is positioned on the right on the high
pressure side. It is powered by compressed air and pumps the oil.
2.2 Compressed Air Supply
NOTICE
Connect pneumatically controlled jacks to a suitable compressed air supply. They may
only be operated with dry, lubricated air according to ISO 8573-1:2010 [1:4:2]. Install a
service unit in the compressed air line immediately upstream of the equipment.
Pit jacks with a load capacity of 14.5 t require a connection pressure of 12 bar, all other
pit jack models must be operated with 10 bar.
2.3 Specifications
Load capacity [t]
5.5
11.0
14.5
16.5
20.0
30.0
Lifting height [mm]
750
450
750
450
750
450
750
750
750
Net weight max. [kg]
240
195
240
195
240
195
260
230
365
Ambient temperature........................................................................................................ 0…40 °C
Noise emission ................................................................................................................< 70 dB(A)

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2.4 Sample Nameplate
PIT JACK
Ser. No. / Date of Production: ***
Project: ***
Type: ***
Load Capacity: ***
Max. Hoisting Height: ***
Net Weight: ***
3Transport and Storage
NOTICE
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 attach-
ments 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 cen-
tre 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 out.
4Installation and Initial Operation
WARNING
Installation and commissioning of the equipment must be carried out by specially
trained personnel, authorised for the task. Specialist personnel includes authorised,
trained skilled staff from the manufacturer, the dealer and the relevant service part-
ners.

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4.1 Assembly of the Carriage Version up to 16.5 t
Required Aids and Tools
suitable hoist
(indoor crane, forklift truck, etc.)
2 round slings
2 lashing straps
1 ratchet with nut
1 torque wrench
wooden board
As-delivered condition

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1
Attach the pit jack with a round sling to the front lift rollers.
2
Lift the pit jack from the pallet with the hoist and place it on level ground. Then
remove the round sling. Caution: Danger of tipping!

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3
Remove the transport lock and install the compressed air line.

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4
Remove and store all four M12 screws in the chassis. Then attach a side piece
with a round sling, pull it out with a crane and place it next to the lift.
Repeat process with second side panel.

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5
Slide the chassis carriers sideways onto the lift rollers (Caution: Danger of tip-
ping!) and secure with lashing straps. At least one second person must be called
in to support the assembly work, and if necessary other persons must also be
called in. Make sure that the lashing straps are positioned as close as possible to
the lift.

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6
Fasten one side part with round sling, lift it by crane and insert it laterally with the
square spigots into the chassis carriers as far as it will go. At least one second per-
son must be called in to support the assembly work, and if necessary other per-
sons must also be called in.
Then reinsert the M12 screws removed in step 4 and hand-tighten them.

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7
Align the chassis with the one already mounted side part load symmetrically on
the lift, i.e. the centre-of-gravity (not the centre!) should be aligned centrally
above the lift. Attention: Danger of tipping!
At least one second person must be called in to support the assembly work, and if
necessary other persons must also be called in.

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8
Repeat step 6 with second side panel. After inserting the second side panel, repo-
sition the chassis centrally on the lift. At least one second person must be called
in to support the assembly work, and if necessary other persons must also be
called in.
Then hand-tighten the M12 screws.

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9
Now align the lift centrally in the chassis and secure it against slipping. Two
lashing straps are recommended, which are guided through the handle openings
in the carriers and enclose the lift in opposite directions. At least one second per-
son must be called in to support the assembly work, and if necessary other per-
sons must also be called in.