Specifications

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7.5 Lift cylinder (Fig7.6)
The lift cylinder is of single-action piston type. It consists of cylinder body, piston
rod, piston and cylinder head etc. The bottom of the cylinder is connected with the
cylinder supporter of the outer mast by bolts 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
wearing on its outer periphery.
At the bottom of the lift cylinder there is a cut-off valve, which operates when the
high-pressure hose bursts for any reason to prevent the load form dropping from
abruptly.
Bushing and oil seal assembled on the cylinder head is used for support the
piston and prevent dirt from entering.
Fig7.6 Lift cylinder
1.
Upper beam
2.
Shim
3.
Dust ring
4.
Oil seal
5.
Guide sleeve
6.
O-ring
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.
Nut, lock
20.
Adjust nut
21.
Joint
22.
Chain
23.
Sheave