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MGH-E
Pit Jack
Original Operating Instructions
BA550901-en
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MGH-E 11.0/75
MGH-E 14.5/75
MGH-E 16.5/75
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BA550901-en
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Contents
1 Safety ...................................................................................................................... 3
1.1 Symbols .............................................................................................................................................. 3
1.2 Intended Use ....................................................................................................................................... 3
1.3 Inappropriate Use ................................................................................................................................ 3
1.4 Requirements on Operating and Service Personnel ............................................................................. 3
1.5 Safety Instructions for Operation ......................................................................................................... 4
1.6 Safety Instructions for Handling Hydraulic Fluid ................................................................................... 6
1.7 What to Do in the Event of Defects or Malfunctions ............................................................................. 6
1.8 What to Do in the Event of an Accident ............................................................................................... 6
2 Description ............................................................................................................... 7
2.1 Design and Operating Principle ........................................................................................................... 7
2.2 Compressed Air Supply ....................................................................................................................... 7
2.3 Sample Nameplate .............................................................................................................................. 7
2.4 Specifications ...................................................................................................................................... 8
2.5 Accessories ......................................................................................................................................... 8
3 Transport and Storage ........................................................................................... 10
4 Installation and Initial Operation .............................................................................. 10
5 Operation ............................................................................................................... 12
5.1 Controls ............................................................................................................................................ 12
5.2 Raising and Lowering ........................................................................................................................ 13
5.3 General Operating Instructions for Lifting Accessories ....................................................................... 14
6 Maintenance .......................................................................................................... 15
6.1 Annual Inspection .............................................................................................................................. 15
6.2 Care Instructions ............................................................................................................................... 15
6.3 Maintenance by the Operator ............................................................................................................ 16
6.4 Refilling with Hydraulic Fluid .............................................................................................................. 17
6.5 Troubleshooting ................................................................................................................................ 18
6.6 Spare Parts ....................................................................................................................................... 19
7 Service Lifetime ...................................................................................................... 19
8 Dismantling ............................................................................................................ 19
9 Disposal ................................................................................................................. 20
10 Contents of the Declaration of Conformity .............................................................. 20
11 Company Information ............................................................................................. 21
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BA550901-en
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1
Safety
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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
safety instructions are not covered by the product liability regulations.
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1.1
Symbols
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Important safety instructions. Failure to comply with instructions could result in
personal injury or property damage.
Important information.
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1.2
Intended Use
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The lift is intended for use in automotive workshops. Use in potentially explosive
areas and outdoors is prohibited. Use in wet or flammable areas is only permitted
with the express written permission of the manufacturer.
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 lift’s rating plate.
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1.3
Inappropriate Use
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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
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1.4
Requirements on Operating and Service Personnel
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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,
4
BA550901-en
• 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
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• 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
lowered 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
equipment.
• 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.
5
BA550901-en
• 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
unintended 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 means (EN 1494).
• The lift must always be moved using both hands. If one person is unable to
provide the manual force required, another person should be called upon.
• Operators must pay attention to all movements of the pit lift so that they neither
endanger themselves or others.
• If the ground is uneven in the area where the lift is being used, secure it to
prevent it from rolling away.
• The use of the lift on a surface where the inclination is greater than 6° is
prohibited.
• No tools or other objects should be left on the loading equipment.
• Only move the lift 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 lift 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 lift and the load are moving.
• Do not deliberately swing the lifting equipment.
• Because the chassis 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 lift should be examined annually for
completeness and legibility.
• In the event of a fault occurring, secure the area in which the lift and load are
moving. Take the lift 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 lift is no longer in use, disconnect the lift from
the compressed air supply or shut off the compressed air supply line.
• The hydraulic components must be inspected annually.
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BA550901-en
• The pressure relief valve must not be adjusted to be above the manufacturer's
specified value, and may only be altered by authorized personnel.
• The system pressure should be monitored regularly using a pressure gauge.
• Fault finding and rectification may only be carried out by authorised personnel.
• Observe the instructions concerning proper removal in the manual.
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1.6
Safety Instructions for Handling Hydraulic Fluid
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• 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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1.7
What to Do in the Event of Defects or Malfunctions
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• If defects occur, such as the lift raising and lowering itself on its own or
distortion of the supporting components, immediately lower the lift or provide
support.
• Turn off the main switch and secure to prevent unauthorized use. Contact the
Service Department.
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1.8
What to Do in the Event of an Accident
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• 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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7
BA550901-en
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2
Description
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2.1
Design and Operating Principle
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These manually operated hydraulic, combined hydraulic / pneumatic or pneumatic
pit jack / axle and transmission jacks are lifting devces 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.
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2.2
Compressed Air Supply
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Connect pneumatically controlled jacks to a suitable compressed air supply. They
may only be operated with dry, lubricated air; install a service unit in the
compressed air line close to the equipment. Centralised systems in the
compressor are not enough.
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2.3
Sample Nameplate
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PIT JACK
Ser. No. / Date of Production: ***
Project: ***
Type: ***
Load Capacity: ***
Max. Hoisting Height: ***
Net Weight: ***
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8
BA550901-en
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2.4
Specifications
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Load capacity 11 000 kg 14 500 kg 16 500 kg
Full travel 750 mm
Raising time (loaded) per 100 m travel 4.4…4.5 s
Lowering time per 100 mm travel 3.2…3.3 s
Ram diameter 90 mm 90 mm 100 mm
Support hole diameter 45 mm
Working pressure 250 bar
Motor power 2.5 kW
Power supply 3 x 400 V, 50 Hz, 16 A time-delay
Cable length 5 m
Ambient temperature 5…40 °C (41…104 °F)
Noise emission < 70 dB(A)
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2.5
Accessories
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MGH-E 11.0/75
MGH-E 14.5/75
MGH-E 16.5/75
Extra wide suspended jack carriage VZ 975255 X X X
Special carriage rollers VZ 975562 X X X
Height adjustment VZ 975564 X X X
Redundant rollers VZ 975605 X X X
SAT support system VZ 975622 X X X
AT 15 axle crossmember VZ 975263 X X X
AT 20 axle crossmember VZ 975565 X X X
ATY 13 axle crossmember VZ 975518 X X X
VG 06-20 front axle fork VZ 975288 X X X
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BA550901-en
MGH-E 11.0/75
MGH-E 14.5/75
MGH-E 16.5/75
AT 4.5 axle crossmember VZ 975606 X X X
ABT 15 support system VZ 975269 X X X
ABT 20 support system VZ 975271 X X X
ABAY 13 support bridge VZ 975264 X X X
ABAY 15 support bridge VZ 975266 X X X
ABTY 13 support system VZ 975520 X X X
ABTA 15 support system VZ 975275 X X X
AB 13 support bridge VZ 975325 X X X
AB 15 support bridge VZ 975326 X X X
AB 20 support bridge VZ 975526 X X X
Support 45 VZ 975278 X X X
Wooden support VZ 975409 X X X
Support with rubber pad VZ 975287 X X X
Stroke extension 100 VZ 975289 X X X
Stroke extension 150 VZ 975290 X X X
Stroke extension 200 VZ 975410 X X X
Gear plate 536x366 VZ 975315 X X X
Gear plate 536x366 VZ 975416 X X X
Gear plate VZ 975607 1 1 1
Gear plate VZ 975608 1 1 1
Lift scale VZ 975573 X X X
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Please note when using axle crossbar SAT (VZ 975622):
With a pit width (dimension "B") of less than 945 mm (SAT 910) or 795 mm (SAT
760), pit jacks with suspended jacking beam require special rollers (VZ 975562,
part # N02.31-13).
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3
Transport and Storage
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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
out.
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4
Installation and Initial Operation
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Installation instructions for type "H" jacking beam
1 Securely attach the jacking beam to the motor crane and slide on to the lift.
2 Push on the second side panel with a second crane or by hand.
3 Push both sides together as closely as possible.
4
Position the pit jack in the centre and attach it to the crane
again.
Caution:
May tip over!
5 Slide the pit jacks onto the U-rails above the pit and attach them.
6 Position the side plates to position and move them until they are the same
distance apart.
7 Tighten the clamps.
Torque: 85 Nm
8 Slide the lift through the entire pit once again.
The play between the roller collar and the edge of the rail must be 5 mm at the
widest part of the pit.
Dismantle in reverse order.
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6
7
8
1
2
4
3
5
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BA550901-en
5
Operation
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5.1
Controls
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Pos: 47 / Techn ische Dokument ation/ Hebetech nik/ 55 Heber /0901 MG H-E/ BA/Inhalt: 5 509 Bedienelem ente (Legend e) @ 27\mod_1328697821134_75.docx @ 1542699 @ @ 1
A
Main switch
B
"Raise" button
C
"Lower" button
D
Potentiometer
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B
C
D
A
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5.2
Raising and Lowering
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Main Switch
Before raising or lowering, turn the main switch (
A
) to position "1". The jack is
ready for operation.
Raising / Lowering
Push and hold button (
B
) to raise, button (
C
) to lower the jack. Once any button is
released, the function is disabled (dead man's type control). Before operating the
jack, make sure the raising/lowering speed is not set too high (see
"Potentiometer").
Potentiometer
The potentiometer (
D
) is used to set the lowering speed. The rotating direction for
increasing or reducing the lowering speed depends on the polarity of the electrical
connection.
Determine the rotating direction first without load at initial operation!
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14
BA550901-en
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5.3
General Operating Instructions for Lifting Accessories
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• Support tubes must not be extended. Risk of tilting!
• Danger of crushing at the edge of the pit and support bridge!
• The support system shall only be removed if the vehicle is in a secure stable position.
•
Beware of changes in the centre of gravity of the load, e.g. in case of different amounts
of fuel in asymmetric fuel systems. If necessary, use suitable lifting accessories.
• Take note of the operating instructions of all equipment and tools used.
• Check lifting accessories carefully for operational safety.
• Pre-position the lift and lifting accessory at the lift points.
• Always take up the load securely, without risk of slipping and central to the centre of
gravity.
• Position actuators, supports and bases at the support points and depending on type,
fix support pipes with pins and secure with cotter pins or wooden blocks with a
minimum spacing of 500 mm.
• Slowly raise or lower the load, watching it continuously.
• Set down the load without risk of slipping and central to the centre of gravity.
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Permissible Extension for Pit Jack and Support Systems
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6
Maintenance
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6.1
Annual Inspection
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• The maintenance interval prescribed by the manufacturer is
12 (twelve) months
.
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.
• Maintenance work shall be done only by authorized and trained service
technicians provided by the manufacturer, licensed dealers or service partners.
• In case of non-compliance the manufacturer's warranty becomes void.
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6.2
Care Instructions
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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
lead to equipment damage.
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Regular care and maintenance is the key condition for functionality and long life
expectancy of the equipment!
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16
BA550901-en
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6.3
Maintenance by the Operator
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•
The pit jack must be extended to its full height at least 1 x per week and
pumped through a few times with the release spindle closed. This automatically
bleeds air from the system and any accumulated leaked oil is eliminated.
• After washing, oil all bright and moving parts.
• The ram, the load bearing pivot, rollers and other moving parts must always be
lightly oiled.
• Periodically lubricate the carriage using the lubricator nipples at the rollers
(8 pcs).
• Underseal residues and other types of dirt can destroy the seals. Clean the
piston rod regularly! Damage to the piston rod must be ground away
immediately, ensuring there is a soft transition at the edges. Detergent and salt
water can freely penetrate and cause considerable damage on the inside.
• Water is dangerous! A compressed air service unit, consisting of air filter, water
separator and oil mister, must be present in the compressed air system near to
the lift (max. distance: 5 m). Drain the service unit weekly, check the level of the
oil and that it functions properly. Clean the service unit.
A so-called refrigeration dryer is not adequate as a compressed air service unit! A
refrigeration dryer cannot filter out the dirt in the line and does not deliver the oil
film necessary for the correct functioning of the equipment.
• Failure to observe these rules shall invalidate any guarantee by the
manufacturer in the event of damage caused by rust, dry running and
contamination of the pipework.
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BA550901-en
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6.4
Refilling with Hydraulic Fluid
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Before checking and topping up the fluid level, make sure the piston rod is fully
retracted
and the jack is disconnected from the air and power supply. The fluid
level must be between the two notches on the screwed-in dipstick.
If the dipstick has only one notch, this indicates the maximum fluid level and the
lower end of the dipstick the minimum fluid level.
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• Replace the hydraulic fluid according to age, the amount of water absorbed
and degree of contamination, but in any event after six years.
• When filling up, only use hydraulic fluid of the same specification ─ HLPD 22.
• If the system was filled with rapeseed oil at the factory, only top up with
rapeseed oil designated BIO HY-FLUID HV 34.
• If the lift is permanently operated at a temperature of <15 °C, a hydraulic fluid
with lower viscosity must be used.
• The pressure hoses
should
be replaced as required, but in any event
must
be
replaced within six years.
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6.5
Troubleshooting
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Problem
Possible Cause
Remedy
Pit jack does not
respond Power supply interrupted Check connection to mains supply
Check fuses inside control box
Ram does not
extend
Pump / motor defective Check pump for running noise
Control defective
Check connections inside control box
(buttons)
Replace control box (Contact service)
Ram extends only
in unloaded
condition
Potentiometer defective or
incorrectly positioned
Check potentiometer position
Check connections inside control box
Replace potentiometer (Contact
service)
Air in hydraulic system
Open bleeder screw (beneath head
plate) and push Raise button for
approx. 1 min
Hydraulic valve/block defective
(occurring in rare cases)
Remove hood, turn potentiometer to
rightmost position, push Raise button
and check valve coil using a metal
object for presence of magnetism.
Turn potentiometer to the left and
check if magnetic effect is increasing.
If not, check connections and control,
replace valve coil if necessary
Replace hydraulic block (Contact
service)
Potentiometer
does not respond
(Check with load)
Potentiometer defective
Check connections inside control box
Replace potentiometer (Contact
service)
Amplifier card defective
Check connections inside control box
Replace amplifier card (Contact
service)
Valve / coil defective
Check connections inside control box
and at solenoid valve
Slightly unfasten the valve and
retighten carefully
19
BA550901-en
Problem
Possible Cause
Remedy
Replace valve / coil (Contact service)
Wrong valve being used Check model name (EMP = prop.
valve)
Ram retracts
sluggishly or not at
all
Wrong valve being used Check model name (EMP = prop.
valve)
Hydraulic valve/block defective
(occurring in rare cases) See above
Mech. damage at pit jack
Check ram and guide bushing for
visible damage
Open bleeder screw and check if ram
is lowering. Try to turn ram. If ram is
lowering and can be turned, it is
undamaged
Contact service
Seal defective, leakage at
guide bushing Contact service
Ram extends
incompletely
Fluid level too low Top up hydraulic fluid (HLP-22)
Air in hydraulic system See above
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6.6
Spare Parts
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To ensure safe and reliable operation, only use original spare parts supplied by the
equipment manufacturer.
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7
Service Lifetime
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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
annual safety inspection.
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8
Dismantling
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Decommissioning and dismantling of the equipment may be done only by
specially authorized and trained personnel provided by the manufacturer, licensed
dealers or service partners.
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20
BA550901-en
9
Disposal
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If you want to dispose of the equipment, please contact your MAHA dealer or the
following address, indicating equipment type, date of purchase and serial number:
MAHA Maschinenbau Haldenwang GmbH & Co. KG
Hoyen 20
87490 Haldenwang
Germany
Phone: +49 (0) 8374 585 0
Fax: +49 (0) 8374 585 500
Email: [email protected]
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Alternatively, you may take the equipment to a specialised waste management
plant to ensure that all components and operating liquids are properly disposed
of.
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10
Contents of the Declaration of Conformity
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MAHA Maschinenbau Haldenwang GmbH & Co. KG
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
discussed and approved by named company beforehand.
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Model:
MGH-E / HEE
Designation:
Rated Load Capacity 11 000 / 14 500 / 16 500 kg
Directives:
2006/42/EC; 2014/30/EU
Standards:
DIN EN 1494
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