Lukas Concrete crushers - Manual (Page 10)

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4. Functional description
4.1 Description
The units are designed in such a way that a hydraulically actuated piston symmetrically
opens and closes two identical opposing crusher arms via a mechanical linkage system.
This allows stones or concrete parts to be broken up or reinforcing bars and reinforcing mesh
to be cut.
All Concrete Crushers guarantee full load-holding function when disconnected from the
hydraulic supply (e. g. when unintentionally decoupled; defective hose, and so on). In addition,
the guard can be removed from the unit. In this case, the operator must, however, take other
measures to protect from flaking or breaking parts, e.g. by sturdy protective clothing and a
safety helmet with a face-protecting visor
4.2 Unit in detail
Quick-disconnect coupling system:
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1 Star grip
2 Control valve
3 Device body
4 Handle with removable guard
5 Protective sleeve
6 Crusher arm
7 Central pin with self-locking nut
and grease nipple
8 Grip tube
9 Replaceable breaker tips
10 Pressure hose
11 Return hose
12 Quick-disconnect coupling,
male
13 Quick-disconnect coupling,
female
14 Mono-coupling half,
male
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