QAY220 All Terrain Crane Operation Manual
IV
5-6 Re-reeving winch rope.............................................................................................................. 5-21
5-6-1 Working conditions .............................................................................................................. 5-21
5-6-2 Reeving method ................................................................................................................... 5-23
5-6-3 Installation of the weight...................................................................................................... 5-27
Chapter 6 Crane electric system ................................................................................................................ 6-1
6-1 Safety control............................................................................................................................... 6-1
6-2 Operation control......................................................................................................................... 6-1
6-3 Electric system of operator’s cab ............................................................................................. 6-2
6-3-1 Devices in operator’s cab .................................................................................................... 6-2
6-3-2 Instrument panel .................................................................................................................... 6-3
6-3-3 Notes on operation ................................................................................................................. 6-6
6-4 Superstructure battery.................................................................................................................. 6-7
Chapter 7 Hydraulic system....................................................................................................................... 7-1
7-1 Check the level of oil in hydraulic tank....................................................................................... 7-1
7-2 Hydraulic system description ...................................................................................................... 7-2
7-3 Main winch circuit....................................................................................................................... 7-3
7-4 Auxiliary winch circuit ................................................................................................................ 7-4
7-5 Slewing circuit............................................................................................................................. 7-5
7-6 Elevating circuit........................................................................................................................... 7-6
7-7 Telescoping circuit....................................................................................................................... 7-6
7-8 Auxiliary circuit........................................................................................................................... 7-7
7-9 Main valve .................................................................................................................................. 7-7
7-10 Balance valve............................................................................................................................ 7-7
7-11 Hydraulic oil tank ..................................................................................................................... 7-8
7-12 Specifications............................................................................................................................ 7-8
7-13 Hydraulic oil description .......................................................................................................... 7-9
Chapter 8 Safety devices............................................................................................................................ 8-1
8-1 Load moment indicator................................................................................................................ 8-1
8-1-1 Working principle................................................................................................................... 8-1
8-1-2 Safety function ....................................................................................................................... 8-1
8-1-3 Logic control function............................................................................................................ 8-1
8-1-4 Hoist height limit function ..................................................................................................... 8-1
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