RT60 Rough Terrain Crane 07 - 23
7. 14 OPERATION OF MAIN BOOM AND ITS TELESCOPING SYSTEM
This crane consists of 5 U-type profile boom sections, two telescoping cylinders and two
sets of wire ropes. The telescopic section 1 is driven by telescopic cylinder I and telescopic
sections 2, 3 and 4 are driven by telescoping cylinder II and two sets of wire ropes.
The telescoping principle is shown in the following figure:
Fig. 07 - 18
1. Telescoping cylinder I
2. Telescoping cylinder II
3. Boom extension wire rope I
4. Boom retraction wire rope I
5. Boom retraction wire rope II
6. Boom extension wire rope II
The balance valve fitted in hydraulic system can not only provide stable telescoping
movements but also keep the boom stop at any required position. The length detector
fitted on the left side of the boom can measure the boom length in real time and transmit
the information to the rated capacity indicator. The boom information will be displayed on
the screen.
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