MAHA MPJ-1S Series User manual

MPJ-1S
Pit Jacks
Original Operating Instructions
BA551601-en
MPJ 4.0/750 1S HM
MPJ 4.0/750 1S HA
MPJ 16.5/750 1S HM
MPJ 16.5/750 1S HA
MPJ 16.5/750 1S FA
MPJ 16.5/750 1S TA
MPJ 20.0/750 1S HM
MPJ 20.0/750 1S HA
MPJ 20.0/750 1S FA
MPJ 20.0/750 1S TA

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BA551601-en
2022-02-24
© MAHA Maschinenbau Haldenwang GmbH & Co. KG
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.
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
1.2 Intended Use ................................................................................................................................................ 6
1.3 Inappropriate Use ........................................................................................................................................ 6
1.4 Requirements for the Operating Personnel................................................................................................ 6
1.5 Safety Instructions for Handling Hydraulic Fluid ....................................................................................... 6
1.6 What to Do in the Event of Defects or Malfunctions ................................................................................. 7
1.7 What to Do in the Event of an Accident...................................................................................................... 7
2Description ....................................................................................................................................................... 8
2.1 Design and Operating Principle .................................................................................................................. 8
2.2 Service Life................................................................................................................................................... 9
2.3 Carriages .................................................................................................................................................... 10
2.4 Safety Features.......................................................................................................................................... 11
2.5 Compressed Air Supply ............................................................................................................................. 11
2.6 Technical Data ........................................................................................................................................... 12
2.7 Sample Nameplate .................................................................................................................................... 12
2.8 Danger Zone............................................................................................................................................... 13
2.9 Control Description.................................................................................................................................... 14
3Transport and Storage................................................................................................................................... 15
4Installation...................................................................................................................................................... 16
5Operation ........................................................................................................................................................ 17
5.1 Safety Instructions for Operation ............................................................................................................. 17
5.2 Preparing the Lifting Operation................................................................................................................. 19
5.2.1 Initial Position...................................................................................................................................... 19
5.2.2 Positioning the Vehicle and the Pit Jack ........................................................................................... 19
5.2.3 Checking the Safety Device ................................................................................................................ 19
5.3 Raising and Lowering ................................................................................................................................ 20
5.3.1 Manual Lifting Operation .................................................................................................................... 20
5.3.2 Automatic Lifting Operation ............................................................................................................... 20
5.3.3 Support ................................................................................................................................................ 20
5.3.4 Lowering Operation............................................................................................................................. 20
5.4 General Operating Instructions for Lifting Accessories .......................................................................... 21
6Inspection and Maintenance......................................................................................................................... 22
6.1 Safety Information ..................................................................................................................................... 22
6.2 Care Instructions ....................................................................................................................................... 22
6.3 Inspection and Maintenance Plan ............................................................................................................ 22
7Troubleshooting............................................................................................................................................. 25
7.1 Safety Information ..................................................................................................................................... 25
7.2 Error Chart .................................................................................................................................................. 25
8Repairs............................................................................................................................................................ 28
9Decommissioning, Dismantling and Disposal.............................................................................................. 28

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10 Contents of the Declaration of Conformity .................................................................................................. 28

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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 personal injury.
WARNING
indicates a potential hazard which, if not avoided, could result in death or severe
personal 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.

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1.2 Intended Use
•The jack is designed exclusively for lifting and lowering passenger cars and
commercial vehicles axle by axle in the course of service and repair work.
•The jack is designed for use in automotive workshops with cars, trucks, bus-
es, trailers and agricultural machinery.
•Lifted loads must always be safely supported in a suitable manner.
•Observe the maximum axle load according to the load capacity specification
on the type plate of the jack and the load handling attachment!
•The jack must not be modified without the express written permission of the
manufacturer. Non-compliance invalidates the declaration of conformity.
•Only vehicles and vehicle components that are suitable for the lifting equip-
ment due to the shape and position of the lifting points may be lifted.
•For vehicles that need to be lifted at two points, use clip-on axle traverses.
1.3 Inappropriate Use
Any use beyond the intended use is contrary to the intended use, e.g.:
•Entering the load handling attachment, riding on the load handling attach-
ment, use for other lifting work.
•Use in explosive and flammable atmospheres is prohibited.
•Use outdoors and in damp rooms (e.g. wash halls) is prohibited.
•Pit jacks and gear jacks are lifting devices and are not designed to hold the
load safely for extended periods of time. Lifted loads must always be safely
supported in a suitable manner.
•The use of more than one pit jack per vehicle is prohibited.
1.4 Requirements for the Operating Personnel
All persons involved in the operation, maintenance, assembly, dismantling and
disposal of the equipment must
•be 18 years of age or older,
•have the mental and physical capacity for their role,
•be qualified and have the documentation to verify this,
•have read and understood the operating manual, and in particular the instruc-
tions on the procedure in the event of a malfunction,
•be instructed in safety guidelines on file, demonstrate experience and
knowledge in the use of the equipment and the hazards it presents.
1.5 Safety Instructions for Handling Hydraulic Fluid
•Neutralize spilled hydraulic oil with binding agent.
•Immediately remove soiled, saturated clothing.
•After inhalation: Medical treatment in case of complaints.

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•After skin contact: Wash skin immediately with soap and water. Consult a
physician if skin irritation persists.
•After eye contact: Rinse thoroughly with plenty of water, consult physician.
•After ingestion: Do not induce vomiting. Call a doctor immediately.
1.6 What to Do in the Event of Defects or Malfunctions
•If irregularities occur, lower or support the lifter immediately.
•In case of malfunctions and repairs, disconnect the siphon from the air supp-
ly.
•Secure the jack against unauthorized use and contact Service.
1.7 What to Do in the Event of an Accident
•Notify first aiders, the ambulance service and/or immediate care doctor:
oWhere did the accident happen (address, workshop, ...)?
oWhat happened?
oHow many are injured?
oWhat injuries have occurred?
oWho is reporting the accident?
•Keep calm and answer questions.

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2Description
2.1 Design and Operating Principle
A
Lowering spindle
B
Rapid control (automatic via control bottle)
A
C
F
D
E
B
G

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C
Air motor (pneumatically operated)
D
Rapid control (manually operated)
E
Load stroke control (automatic via control bottle)
F
Load stroke control (manually operated)
G
Pressure relief valve in hydraulic block
These hand-hydraulic and pneumatic-hydraulic combined pit jacks / axle and
transmission jacks are lifting devices for lifting vehicles and vehicle
components. The pit jack can be moved longitudinally and transversely via a
carriage, the axle and gear jack via a floor-running carriage with rollers.
An attached support claw serves as a load carrying device. For special load
application points on vehicles, other suitable supports from our range of
accessories can be fitted (support plate, transmission plate, axle traverse).
The hydraulic block contains load, suction and overload valves. The self-closing
lowering screw is also mounted on the hydraulic block. An overflow system is
installed for automatic bleeding.
Special features of manually operated jacks (hand-hydraulic):
The high-pressure and low-pressure hand pumps are mounted according to the
spare parts list, depending on the type (see www.maha.de/de/support).
Compared to the high-pressure hand pump, the low-pressure hand pump has a
larger pump cross-section and thus a larger delivery volume.
Due to its smaller pump cross-section, the high-pressure hand pump has the
ability to achieve higher hydraulic pressures and thus lift heavy loads.
Special features of automatically operated jacks (pneumatic-hydraulic):
In pneumatic-hydraulic pit jacks with rapid control, the hydraulic oil in the tank is
pressurized by compressed air. This displaces the hydraulic oil and the lifting
piston quickly reaches the load application.
The air motor (LM) is an oscillating pneumatic-hydraulic pressure intensifier,
which is firmly bolted to the hydraulic block. It is driven by compressed air and
transports the hydraulic oil.
2.2 Service Life
The product is designed for 22,000 load cycles as standard in accordance with
EN 1493. The duration of the intended use in relation to the possible product
service life must be assessed and determined by an expert during the annual
equipment inspection.

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2.3 Carriages
Carriage Types
Three types of carriage are distinguished for the following jacks:
•Suspended jacks (A) are designed exclusively for use in pits. The carriage is
held in its fixed track by flanged rollers. In addition, the lifter can be moved in
the chassis transverse to the pit.
•Floor-running jacks (B) are freely movable and are used in pits as well as un-
der vehicle lifts for lifting and lowering power units.
•Rail-guided jacks (C) are designed exclusively for use in pits. The carriage is
held in its fixed track by flanged or deflector rollers. In addition, the jack can
be moved in the carriage transverse to the pit. The track rollers run directly
on rails or in steel profiles. The running surface must be level, firm and clean.
The slope of the ground must not exceed 2%.
A
B
C