Operator’s Manual for Crawler Crane
Chapter 4 Crane Operation
4.1 Operating and control instruments ................................................................................... 4-1
4.1.1 Operator’s cab, overview ...................................................................................... 4-1
4.1.2 Left control box ..................................................................................................... 4-3
4.1.3 Right control box ................................................................................................... 4-4
4.1.4 Control panel assy. ............................................................................................... 4-6
4.1.5 Right control panel ................................................................................................ 4-8
4.2 Instruction for digital display system ............................................................................... 4-11
4.2.1 Load moment limiter ........................................................................................... 4-12
4.2.2 LCD screen of parameter monitor ...................................................................... 4-12
4.3 Startup of the crane ........................................................................................................ 4-18
4.3.1 Adjustment of crane operator’s seat ................................................................... 4-18
4.3.2 Checks before startup ........................................................................................ 4-21
4.3.3 Turn on power supply ......................................................................................... 4-22
4.3.4 Start the engine  .............................................................................................. 4-24
4.4 Safety devices ................................................................................................................ 4-25
4.4.1 Emergency stop button ....................................................................................... 4-25
4.4.2 Battery master switch ......................................................................................... 4-25
4.4.3 Load moment limiter ........................................................................................... 4-26
4.4.4 Boom angle indicator .......................................................................................... 4-29
4.4.5 Derrick limiter ...................................................................................................... 4-30
4.4.6 Lowering limiter .................................................................................................. 4-31
4.4.7 Hoisting limiter .................................................................................................... 4-33
4.4.8 Support cylinder locking device .......................................................................... 4-34
4.4.9 Relief valve ......................................................................................................... 4-34
4.4.10 Anemometer ..................................................................................................... 4-34
4.5 Crane operation .............................................................................................................. 4-35
4.5.1 Operation of travel gear ...................................................................................... 4-39
4.5.2 Operation of crane winches ................................................................................ 4-45
4.5.3 Operation of synchronizing A-frame and main boom derricking winch and
synchronizing reeving winch and working winch ........................................................... 4-57
4.5.4 Operation of slewing mechanism ....................................................................... 4-60
4.5.5 Simultaneous operation ...................................................................................... 4-63
4.5.6 Operator’s cab movement-controlling mechanism ............................................. 4-77
4.5.7 Auxiliary remote control box ............................................................................... 4-80
4.6 Rope reeving .................................................................................................................. 4-86
4.6.1 Heavy duty boom (S) .......................................................................................... 4-88
VI
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