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4.4. Main control valve
The crane can be operated from the main control valve, but as soon as you have selected remote
control operation, it is impossible to operate the main control valve levers.
The speed of a function corresponds to the extent of the lever movement, regardless of the load
and other functions, as long as the oil flow is sufficient. When the oil flow is insufficient, one or more
functions might reduce their speed.
When remote control is used, the oil flow is allocated by means of PFD.
Standard functions and symbols
The order of the functions is customized for
each crane. The image on the right shows
an example of a main control valve functions
placed on the base.
NOTE
For remote-operated cranes the levers on
the main control valve are only for
emergency operation.
FOR EMERGENCY O
PERATION ONLY
FOR EMERGENCY OPERATION ONLY
4.5. Different stabiliser control valves
Different stabiliser control valves that you can find on cranes:
• 2-function/4-function control valve included in the main control valve
• 2-function control valve
• 4-function control valve.
You can operate the stabiliser control valve manually or remotely. On remote-controlled cranes the
stabiliser control valve levers are only to be used for emergency operation.
The HiPro system
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HIAB L-HiPro 145/165/195/235