Lukas SC 557 - Manual (Page 11)

11
4.3 Circuit diagram
To enable comprehension of the function, a simplifi ed hydraulic cylinder of the rescue
equipment (A) + hand valve (B) are depicted here.
A B
cut / close /
pulling / squeezing
spreading /
opening
4.4 Control of the operating movements
The spreading arms movement is controlled via the star grip of the mounted valve.
(see cover, item 1 and, below, fi gure 3).
star grip
fi g. 3
4.5 Hydraulic supply
A LUKAS motor pump or hand pump only may be used to drive the equipment.
If the pump unit is a different make, you must make sure that it complies with LUKAS
specifi cations, otherwise potential dangers may occur which are not the responsibility of
LUKAS.
Ensure in particular that the authorised operating pressure for LUKAS equipment is not
exceeded.
REMARK:
Before you use pumps from a different manufacturer, you must contact LUKAS
or an authorised dealer.
The pump unit and the rescue tool are connected by hoses.
4.6 Hoses