Heidkamp W00307 Manual De Instrucciones página 11

3.1 Single Action Installation
3.1.1 Release the pump drive lever by removing the hook from the lever-
holder housing.
2.1.2 Pump manually with the drive screw open (rotate a few times to
loosen) in order to fill the pump´s internal circuit with oil.
3.1.3 Close the drive screw by turning clockwise manually. You do not
need to close too tightly.
3.1.4 Now pump using the drive lever. First, fill the hose with oil. The
number of thrusts required will depend on the length of the hose and the flow supplied by the
pump piston. With single-speed pumps, the flow will remain the same at all times, regardless of
the load or pressure. With two-speed pumps, the large piston will be activated during the load-
free feed movement, and when the device comes into contact with the load, an internal large
piston relief value will be automatically triggered and only the oils supplied by the small piston will
be available up to 700 kg/cm³, which is the maximum pressure for the device.
3.1.5 Once the hose is full of oil, the cylinder piston will start to advance.
3.1.6 If the cylinder has a mechanical limit switch capable of withstanding the maximum device
pressure, continue pumping until the limit switch is reached.
3.1.7 If any control elements (pressure gauges) are available, you will be able to see how the pressure
increases along with the effort required to move the lever.
3.1.8 Keep pumping until you obtain the maximum pressure (700 kg/cm³). In this way you will be able
to check the correct functioning of the internal safety valve and the absence of oil leaks in the
installation.
3.1.9 Maintain pressure in the installation for a short period of time (1 minute) without pumping, in
order to check the correct functioning of the pump´s check valve.
3.1.10 Gently open the pump´s drive screw (by turning anticlockwise) in order to protect the fall of the
pressure gauge needle. Do not force the drive screw open. The cylinder will not move back more
quickly because the screw is looser. A couple of turns will be sufficient.
3.1.11 If the cylinder has a return spring (SM, SMP, SMX, SH, TE, T, SMA, SHA, CY, KD) the piston will
move back automatically. The return speed may be slow in some applications. In this case, we
recommend the use of double effect cylinders. In the case of lad return cylinders (SP, SC, SL, SSR,
ST, STC), you will need to push the piston back using more or less force, depending on the size
and position of the cylinder.
3.1.12 In cylinders without a mechanical limit switch (SSR, ST, STX) this type of test cannot be carried
out. If you do not have a test bench, you will have to test the installation using the actual load in
the application. This operation should be carried out with extreme care by experienced personnel
and maximum safety measure should be applied.
3.1.13 Repeat the processes as many times as necessary until you are comfortable handling the device.
3.1.14 If using close or check valves, or working with various cylinders via flow distributors, remember to
take into consideration the effect these accessories may have on the functioning of the device,
and establish an operating procedure in order to avoid unwanted effects.