Holmatro HGC S Serie Manual De Instrucciones página 41

4 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.
WARNING
Make sure you are up to date on all safety regulations and that you have mastered the use
of all equipment of the system you are going to work with.
4.2 System operation
4.2.1 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 engine, 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 equipment.
The tool has a hydraulic cylinder containing a plunger that can move axially. If the cylinder is pumped
full from the bottom, pressure builds up beneath the plunger so that it is pushed to the outside.
When using a double acting cylinder (hydraulic return) the hydraulic oil is pumped full from the top,
and the plunger is forced back into the cylinder.
The hose is the piece of equipment that connects the pump, manifold and the tool together.
For industrial applications, Holmatro has two hose-coupler systems: High-Flow and Auto-Lock.
High-Flow hose-coupler system is used as the standard hose-coupler for cylinders.
4.2.2 High-Flow
The High-Flow coupler is the screw-on coupler used on single or duo hoses. In case of duo hoses, the
supply hose and the return hose are bundled together with ties. If you want to connect or disconnect a
tool and/or a hose, make sure that the pressure on the pump coupler is relieved first.
4.2.3 Auto-Lock
The Auto-Lock coupler is the quick coupler used on single or duo hoses. In case of duo hoses, the
supply hose and the return hose are bundled together with ties. Each end of the hose(s) has a female
and a male coupler. If you want to connect or disconnect a tool and/or a hose, make sure that the
pressure on the pump coupler is relieved first. If you want to connect or disconnect the couplers push
the lock ring back and connect or disconnect the couplers. Turn the retainer ring on the female side
clockwise to secure or anti-clockwise to unsecure the lock ring.
4.3 Preparing for use
4.3.1 Preparing for use
• Place the cylinder preferably with the plunger downwards to prevent dirt from entering the cylinder.
• Use a pump with a pressure relief valve or a three-way valve for single-acting cylinders.
• Use a pump with a four-way valve for double-acting cylinders.
Connect both couplers on double-acting cylinders.
HYDRAULIC CYLINDERS 916.000.851_007
EN
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