Additional Notes, Safety Instructions
SAFETY WORKING INSTRUCTIONS
1. Read instructions
Before the jack is used, these instructions must be read in their entirety by all
operating staff (i.e. all personnel who have received instructions to carry out the
lifting and transport operations).
2. Communication and organisation
The communication between all operating stuff must be guaranteed, especially
when the visibility between each other is interrupted. One non-operating person
has to be responsible for control and clear advice to all operating personnel.
3. Danger Zone
The operator must ensure that other persons should remain at a safe distance of
1.5 times the height of the load (i.e. clear of the danger zone). No unauthorised
person or anyone not familiar with its operation should attempt to use the jack.
4. Load and Centre of gravity
The complete net weight and the position of the centre of gravity of the load have
to be found out before any operation.
Use of jacks and hydraulic pumps without knowing these facts is dangerous and
can be lead to damaged equipment and/or damage to the load and operating
personnel.
The choice of an adequate jack can be done with this formula:
Minimum jack capacity = (Load weight in kg) x 1. 25 (security factor)
(I.e. load weight 4000 kg x 1.25 = 5000kg; the jack must have a minimum
capacity of 5000 kg.)
While using more than one jack with one load it is important that the jacks are
placed under the load in positions where it is guaranteed that all of them will have
to lift the part of the weight. Therefore the part of the load plus security factor
must not exceed the capacity of the single jack. In order to place the jacks
correctly as requested it is absolutely necessary to know where the position of
the centre of gravity is located.
Lowering the jacks without a central pump the lowering speed has to be slow and
absolutely synchronised on all jacks deployed. For security purpose use of Jacks
with different capacities isn’t allowed.
5. Recommended use
These jacks are designed specifically for lifting heavy loads vertically. They
should be used on solid level ground only. Do not use on a slope or slippery
ground.
The load must be stable enough for lifting on a single point and must not be tip
over while lifted. The surface where the jack will be attached must be suitable for
lifting referring size, stability and non-slippery. Size means that there must be
enough room to lift up with the full surface of the lifting toe or top plate, only
partial connection between the lifting surface of jack and load is not enough. For
working with 2 or more jacks we recommend the use of a central pump when the
weight of the load:
1.
exceeds the capacity of one jack for more then 1.5 x or
2.
the height of the load exceeds the length of the side of the load which is to
be lifted.
While working with more than one jack the knowledge of the centre of gravity
determines the position of the jacks. (See 4 above “load and centre of gravity”).
Important: If the height of the load exceeds the length of the side being lifted
and/or the centre of gravity is located in the upper half of the load appropriate
precautions must be taken to prevent the load from tipping.
6. Lifting and lowering:
After preparing the a.m. steps the initial lifting should be done slowly and
carefully. Examine the load carefully after the first few mm of lift to ensure there is
no exceptional slipping or bending in the load. If this safety check is done, the
lifting operation can be continued.
When the jack is in the raised position under the load:
-
No-one should attempt to work on or in the close vicinity of the load or
handle under the load.
-
The jack should not be left unattended when supported on the raised
jack.
-
No unauthorised person or anyone not familiar with its operation should
attempt to use the jack.
7. Lifting height:
For security reasons the load has to be lifted and lowered step by step. Steps
causing more than 30 mms of height difference on one side have to be avoided.
Use suitable pads, i.e. hard wood or steel to secure the load when changing the
side. For your own safety do this when lifting tall loads with a high centre of
gravity.
PROTECTIVE EQUIPMENT
All members of operating personnel must wear safety footwear with steel
toecaps.
SAFETY MECHANISM
Each jack is fitted with a safety valve which restricts the permissible operating
pressure of its internal pump to 520 bar, thus limiting the maximum load to the
weight permissible for the device in question
.
WARNINGS
When working with 2 or more hydraulic jacks and 2 or more hydraulic pumps
on one load there is a danger that individual jacks could become overload and
damaged if lowering is performed unevenly. This could result in the load being
dropped suddenly or tipped over, creating considerable risk of personal injury
to the operator as well as risking damage to the load and anything else in within
the danger zone.
It is of the utmost importance when working with a jack and while lowering the
load, that no part of the jack other than the lowering screw is touched. When
using single or multiple jacks neither the operator nor anyone else should allow
any body part to enter the area beneath the load, beneath the lifting toe or
close to the jack body and sliding column. When lowering the load, the toe and
sliding column move in relation to the body of the jack and the floor, clothing
and operator’s body parts could be trapped and personal injury result if proper
caution is not exercised.
GENERAL SAFETY INSTRUCTIONS
For safe working it is necessary to know the local general safety regulations of
your country. Furthermore you have to pay attention to the regulations
depending to your branch of industry, operational area and operation purpose.
Jung-Equipment is designed for use under usual atmospherically conditions
and temperatures between -5° and 45° C.
All operational personnel working with the JUNG equipment must be instructed
regularly in safe working conditions by a security instructor or a safety expert.
This must be done personally as training, delivery of written regulations or
manuals and/or announcement on signs is not enough.
Before each use of the jack you must check that it is in good working condition
and a valid inspection badge is on the jack.
If there is no badge or the jack seems obviously defective, i.e. deformations or
cracks in the main housing, wear or oil leaks on moving parts, the jacks should
be inspected before use and a valid control badge has to be put on.
