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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
handle. This deadman's handle can be turned to the left or the right, 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 handle is released, it returns automatically to the neutral
position and the piston immediately stops moving.
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.
5.2
Connect the hydraulic hoses
5.2.1
General
CAUTION
Never use damaged couplers.
Never use pliers or similar tools to connect the hydraulic couplers.
5.2.2
Hose with CORE™ couplers
See Fig. 4.
•
Remove the dust caps from the couplers.
•
Check the couplers for dirt and damage and clean them if necessary.
•
Insert the couplers by holding them against each other and pushing the male coupler with one
action into the female coupler. The external ring of the female coupler must move in the opposite
direction to the arrows.
•
Pull both couplers to check whether the couplers cannot be pulled apart with a normal manual
effort.
•
Put the dust caps into each other to avoid dirt.
NOTICE
Do not store the hose with the ends coupled together.
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PW 5624 (ST)
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