Eaton Hydrowa, Instruction Manual

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Instruction Manual
Page 11
take side loads and / or radial loads. Also the lifetime of the bearings,
which are placed in the mounting eyes, will be shortened with radial
loads, or loads caused by stress in the construction.
7. During transportation the cylinder is fully retracted (unless otherwise
specified). Sometimes the cylinder has an “over-stroke” and will not fit
directly into the structure. The centre to centre distance, of the fully
retracted cylinder, is shorter than the centre to centre distance of the
structure. In this situation mount the body of the cylinder first and use a
crane to balance the cylinder. First fill and air bleed the cylinder (see
chapter 6.5). Slowly extend the piston rod at low pressure (use the
amount of pressure just to overcome the friction force) until the
mounting eye, at the end of the piston rod, has reached the correct
position. Then attach the mounting pin.
Do not lift the cylinder with the sling connected to the piston
rod that is extending! Support the cylinder at all time with
Nylon slings.
8. Before using and testing the cylinder, read chapter 7 ‘User guide’.
9. Connect the cylinder to its hydraulic system.
10. Pressurize the cylinder slowly until the piston rod is extending.
11. Check the cylinder for any internal or external leakage.
12. Do the same again but then the other way around. (Retracting the
piston rod)
13. Again check the cylinder for any internal or external leakage.
14. If there is no indication of leakage, test the cylinder at low pressure (at
25% of the design pressure). Test the cylinder once in extending
position and once in retracted position. Hold these positions for 5 min
and check if the pressure remains at the pre-set pressure. When the
pressure drops the cylinder is leaking internal or external. Contact the
manufacturer if the cylinder is leaking oil. (Contact info can be found in
paragraph 9.2)
15. Test the cylinder at high pressure (design pressure). Test the cylinder
once in extending position and once in retracted position. Hold these
positions for 5 min and check if the pressure remains at the pre-set
pressure. When the pressure drops the cylinder is leaking internal or
external. Contact the manufacturer if the cylinder is leaking oil. (Contact
info can be found in paragraph 9.2)
16. When all tests are finished and no failure has occurred, the cylinder is
ready to be used again.
17. Ensure that the used hydraulic system (pump-unit) that activates the
cylinder is in compliance with the standard ISO 4413 and / or EN 982.
Stay out of the line of movement of the piston rod and do stay away
from connection ports when the cylinder is in operation.
6.4 Installation of accessories
Most of the accessories are already mounted to or into the cylinder. In the
appendix additional information is added for most common accessories.