Lukas LKS 55 EN - Manual (Page 6)

6
5.6 Examples for possible defects of hoses
- Damages of the surface and the interior (e.g. chafe marks, cuts or fissures).
- Embrittlement of the surface (fissuration of the hose material).
- Deformations, which are not in accordance with the natural shape of the hoses, in pressureless
condition or under pressure or in case of bendings, e.g. separation of material layers, blister
formation, squeezing or break spots.
- Leakage points.
- Instructions for installation were not observed.
- Emerging of the hose from the end fittings.
- Damages or deformations of the end fittings which deteriorate the function and stability of the
end fittings or the connection between hose and end fitting.
- Corrosion of the end fittings or the metal inlets, which deteriorates the function and stability.
- Storage and operation periods were exceeded.
6 Intended use
LUKAS combi tools LKS are specially designed for rescuing casualties in case of accidents within
road-, rail- or air traffic. Their main purpose is to free injured people after traffic accidents by cutting
open door hinges, door struts and roof struts. Furthermore people can be freed by spreading open
the car doors or pulling up the steering pillar using a chain set.
In general, objects can be pulled, spreaded or moved. In any case the objects to be manipulated
must be secured with massive prop-ups and supports.
The tools are suitable for submerged operation in water up to a depth of 40m.
7 Function and performance
7.1 Description
The devices are designed in such a way that a hydraulically actuated piston via mechanical joints
symmetrically closes two identical blade arms positioned opposite each other to cut the object in
question. The blade geometry is adapted to the application so as to avoid as far as possible a
sliding of the material to be cut. By opening the blade arms objects can be spread apart.
7.2 Connection diagram
For your better understanding the hydraulic diagram is
showing in simplified manner the tool's hydraulic
cylinder (A) with control valve (B).
7.3 Control of movements in operation
The arm movement is controlled by the firmly mounted star grip control valve (see cover page
item 1).
7.4 Hydraulic oil supply
LUKAS motor/engine pump or hand pump is used for operating the devices.
If the power pack comes from a manufacturer other than LUKAS, it must be ensured that it fulfils
the LUKAS specifications, as otherwise dangers may occur for which LUKAS cannot be held
liable. Especially it has to be made sure that the permissible working pressure of 63 MPa (630
bar) is not exceeded.
7.5 Hoses
The connection between motor pump and combi tools unit is normally effected with LUKAS hoses.
If pipes are to be used, please contact LUKAS.