Kunststoffschweißtechnik
Maintenance and repair Chapter 7
25.06.12 Working instructions WIDOS 4001 Page 33 of 59
7.5. Venting the hydraulic cylinders
Necessary: If a new cylinder has been built in.
Condition: A vent hose must exist preventing oil coming out uncontrolled.
Procedure: Open the slides completely, loosen the vent screw for closing at the
cylinder and connect the vent hose.
Close the slides until there is no air in the vent hose. Repeat the same
process at the vent screw for opening.
There are 2 drilled holes at the right table, one of it is in the middle under the horizontal
movable plate.
The cylinder has to be dismounted completely from the movable table on the left side.
Then open completely the cylinder:
Open the rear vent screw (seen from the cylinder) and screw the vent hose to it.
Move backwards and forwards until there is only oil left in the hose and no more air bubbles.
Unscrew the vent hose and tighten again the screw.
Repeat the same process at the frontal screw.
To be sure that the air has left the cylinder completely, you can perform the following the test:
Drive out the cylinder for the half way as soon as both vent screws are tightened again.
Move slowly forwards and backwards the piston rod.
A continuous resistance signifies that there is no more air in the cylinder.
Jerking means there is still left air in the cylinder.
7.6. Clamping elements
• For a long service life clean and grease regularly the treaded spindles and the joint parts
which are used for clamping the pipes.
7.7. Cleaning of the machine
The used materialis and clothes have to be handled and disposed off properly especially
• when cleaning with solvents
• when lubricating with oil and grease
7.8. Disposal
At the end of their life time, the machine and the wear parts have to be disposed
of properly and non-polluting, and in accordance with the national laws of waste
disposal.
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