Holmatro HMC 8 U Manual página 26

EN
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 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 single-acting tool has a hydraulic cylinder containing a plunger that can move axially. If the cylinder
is pumped full from the bottom, the pressure builds up beneath the plunger so that it is pushed to the
outside. The axial movement of the plunger is used directly to a ram or transferred to a spreading or
cutting mechanism. When the oil pressure is released on the pump, a spring forces the plunger back
into the cylinder and the oil flows back to the pump.
5.1.2 High-Flow couplers
The High-Flow coupler is a screw-on coupler used on a single-hose system.
If you want to connect or disconnect a tool and/or a hose, you must first set the pressure relief valve on
the pump to the "neutral" position. After connecting the hose(s) and the tool you must set the pressure
relief valve to the "operation" position so you can use the tool.
5.1.3 Single-hose couplers
The single-hose coupler is used on single hoses. Each end of the hose has a female and a male
coupler. If you want to connect or disconnect a tool and/or a hose, you must first set the pressure relief
valve on the pump to the "neutral" position. After connecting the hose and the tool you must set the
pressure relief valve to the "operation" position so you can use the tool.
5.2 Connect the hydraulic hose(s)
5.2.1 General
WARNING
Never use damaged couplers.
CAUTION
Never use pliers or similar to connect the hydraulic couplers.
5.2.2 Connect the High-Flow couplers
Refer to Fig. 4.
26 916.269.264_008 HMC