System Operation - Holmatro CU 4007 Manual

Specifications
Standards
Classification
• EN 13204
• NFPA 1936
Directives
Country of manufacture
4 Preparation for first use
4.1 General
Check the equipment for completeness and damage. Do not use the equipment if it is damaged; in that
case contact the Holmatro dealer.
5 Operation
5.1

System operation

5.1.1 General
A system is an assembly of a hydraulic pump, hose(s), and one or more tools.
The hydraulic pump is driven by an internal combustion engine, electric motor, pneumatically or by hand
or foot power. This pump displaces hydraulic oil and is capable of building up pressure. The hose is for
transporting the hydraulic oil between the pump and the tool.
The tool has a hydraulic cylinder containing a piston that can move axially. If the cylinder is pumped full
from the bottom, pressure builds up beneath the piston so that it is pushed to the outside. If the cylinder
is pumped full from the top, the piston is forced back into the cylinder.
The direction of the movement of the cylinder is determined by a control valve, the so-called deadman's
button. This deadman's button can be tipped over forwards or backwards, thus determining the direction
the piston moves. In the neutral position no pressure is built up in the cylinder and the oil flows back to
the pump without pressure. If the deadman's button is released, it returns automatically to the neutral
position and stops immediately the movement of the piston.
In tools like cutters, spreaders and combi tools the axial movement of the piston starts a mechanism
that makes a cutting or spreading movement.
The hose is the piece of equipment that connects the pump to the tool, thus creating a closed system.
5.1.2 CORE™ couplers
The hydraulic hose of the CORE™ system is a single hose, that combines a high pressure supply hose
inside a low pressure return hose. The female coupler has a unique function: after disconnection it
connects the supply and the return lines internally. This means you can connect and disconnect tools
without interrupting the oil supply to the hose.
CU4007
Unit
916.000.967_005
CU 4007
EN 13204 / NFPA 1936
AC55B-4.5
A4 / B3 / C2 / D4 / E4
2006/42/EC
The Netherlands
EN
CU 4007 C
AC55B-3.8
27