Preparation For First Use; System Operation; Pressure Relief Valve - Holmatro PA Serie Manual De Instrucciones

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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.
• Check that the correct pressure relief tool is present for the hose system in use.
5 Operation
5.1

System operation

5.1.1 General
Oil is drawn under the pump plunger out the oil tank by moving the pump lever upwards and oil is
pressed into the hose system by moving the pump handle downwards.
In two-stage pumps a change over valve ensures that the oil flow is automatically reduced when change
over pressure is reached. Every pump is fitted with a safety valve, which limits the maximum pressure.
5.1.2 High-Flow couplers
The High-Flow coupler is a screw-on coupler used on a single or duo-hose system.
In case of duo hoses, the supply hose and the return hose are bundled together with ties. Each end of
both hoses has the same coupler: female and male couplers.
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 open (0) position. After connecting the hose(s) and the tool you must set the pressure
relief valve to the closed (1) position so you can use the tool.
5.1.3 Quick-lock couplers
The Quick-lock coupler is an auto-lock coupler used on a single or duo-hose system. The couplers are
pushed into each other, lock automatically and can be secured by a retainer ring.
In case of duo hoses, the supply hose and the return hose are bundled together with ties. Each end of
the hose has a female and 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 open (0) position. After connecting the hose(s) and the tool you must set the pressure
relief valve to the closed (1) position so you can use the tool.
5.1.4

Pressure relief valve

The pressure relief valve is on the body together with the hydraulic couplers.
With the pressure relief valve (3) it is possible to lower a load controlled. By turning the relief valve
further open, the load will lower faster. To obtain maximum lowering speed, make sure the relief valve is
turned 3 revolutions or more. The knob of the relief valve cannot be turned out the housing.
• Turn the pressure relief valve open (position 0) when connecting or disconnecting the hydraulic
hoses.
• Close the pressure relief valve (position 1) when you use the equipment.
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