PR120H
MECHANICAL MAINTENANCE
Version: 5
Page: 9 of 24
Date: 2022.12.13
Procedure step by step
1. The hydraulic cylinder has to be emptied for oil.
2. Pos. 2 cylinder top is dismounted and screwed out of the cylinder tube pos. 3.
3. Pos. 1 piston, 2 cylinder top and 4 piston rod cylinder top are pulled out of the cylinder tube pos. 3.
4. Remove old gaskets and seals on pos. 1 piston without damaging the surfaces.
5. By careful heating of the piston Pos. 1 to app. 220 º C it can be loosened from the piston rod Pos. 4.
6. The cylinder top pos. 2 can now be pulled of the piston rod pos. 4.
7. Remove old gaskets and seals on cylinder top pos. 2 without damaging the surfaces.
8. Clean all the parts and check if there is any damage Damaged parts has to be replaced.
9. Mount the new gaskets and seals on cylinder top pos 2 and lubricate with a little hydraulic oil. Be careful
not to damage the gaskets/seals do not use any tools with sharp edges.
10. The cylinder top pos. 2 is pulled back on the piston rod pos. 4.
11. The thread on piston rod pos. 4 and in the piston pos. 1 has to be clean and oil free. Use Loctite 270 on
the thread and screw the piston pos. 1 back on the piston rod pos. 4.
Clean for any leftovers of Loctite 270.
12. Gaskets and seals are mounted on the piston pos. 1. Lubricate with hydraulic oil. Be careful not to
damage the gaskets/seals do not use any tools with sharp edges.
13. Pos. 1 piston, 2 cylinder top and 4 piston rod cylinder top are put back in the cylinder tube. The cylinder
top pos. 2 is screwed back in the cylinder tube pos. 3.
14. The hydraulic cylinder has to be checked for any leaks and is then ready to be mounted on the machine
again.
BEFORE STARTING PRODUCTION THE HYDRAULIC MOTION SHOULD BE CHECKED IN SINGLE MODE!
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