Lukas LSI Series Cutter - Manual (Page 8)

8
5.6 Examples for possible defects of hoses
- Damages of the surface and the interior (e.g. chafe marks, cuts or fi ssures).
- Embrittlement of the surface (fi ssuration 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 fi ttings.
- Damages or deformations of the end fi ttings which deteriorate the function and
stability of the end fi ttings or the connection between hose and end fi tting.
- Corrosion of the end fi ttings or the metal inlets, which deteriorates the function and
stability.
- Storage and operation periods were exceeded.
6 Intended use
LUKAS LSI cutters are specially designed for cutting steel, suffi ciently hard ferrous
metals, sheet steel and cables. Depending on the material to be cut, cutter blades in
different shapes are available.
7 Function and performance
7.1 Description
The devices are designed in such a way that a hydraulically actuated piston via me-
chanical 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 for as possible a sliding of the material to be cut.
7.2 Connection diagram
For your better understanding the hydraulic diagram
is showing in simplifi ed 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 fi rmly mounted star grip control valve (see
cover page item 1).
7.4 Hydraulic oil supply
Only 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 fulfi ls the LUKAS specifi cations, 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 50 MPa (500 bar) is not exceeded without consultation with LUKAS.
7.5 Hoses
The connection between motor pump and cutter unit is normally effected with LUKAS
hoses. If pipes are to be used, please contact LUKAS.