Baoli CPDS15, Operation & Service Manual

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7.1.3 Lift cylinder
The lift cylinder is of single-action piston type. It consists of primarily of cylinder body,
piston rod, piston and cylinder head. The bottom of the cylinder is connected with the
cylinder supporter of the outer mast by blots and pins, while its top (i.e. piston rod head) is
connected with the upper beam of the outer mast.
The piston, fastened to the piston rod with spring wire is fitted with oil seals and
bearings on its outer periphery.
There is a cut-off valve assembled on the bottom of the cylinder, for protecting the
cylinder if the high pressure hose is cranked suddenly when lifting the mast.
The bushing and oil seal is set on the cylinder head to support the piston rod and
prevent the entering of the dust.
Fig.7-14 Lift cylinder
1. Upper beam
2. Adjust shim
3. Dust ring
4. Oil seal
5. Guide sleeve
6. O-ring real
7. Cylinder head
8. Bushing
9. Cylinder body
10. Piston rod
11. Piston
12. Oil seal, piston
13. Oil seal
14. Ring
15. Snap ring
16. Cut-off valve
17. Spring lock ring
18. Cotter pin
19. Lock nut
20. Adjusting nut
21. Joint
22. Chain
23. Chain wheel