Venturo HT25KX, Инструкция по установке и эксплуатации

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EXPLANATION OF HYDRAULIC VALVE SYSTEM
OVERVIEW
Venturo’s hydraulic cranes are available in two general configurations: Proportional and Non-proportional. The
Non-proportional configuration utilizes a safety shutoff valve which, when not actuated, allows hydraulic fluid to
bypass the valve bank and return to tank; the crane will not function when the safety shutoff valve is not
actuated. When the safety shutoff valve is actuated (control pendant energizes the coil or the coil is manually
overridden), hydraulic fluid cycles through the valve bank and allows the crane to function. The Proportional
configuration utilizes a proportional valve which in its fully closed and fully opened positions functions similarly to
the safety shutoff valve, but adds the ability to operate the crane at any speed in between these two extremes.
In both the Non-proportional and Proportional configurations, the four crane functions (winch, rotation, boom
elevation, and boom extension) are controlled by four separate valve sections. Each valve section has two
solenoid coils (and two manual overrides) which control the direction that the function operates (e.g. winch up vs.
winch down). For a given crane function and direction (e.g. winch up) the solenoid coil and the associated
manual override lie on the same side of the valve bank (both “push”).
22328
C200
2-24-98
5-1-98A
HYDRAULIC SYSTEM
HT25, HT40/50
SUPERCEDES
TITLE DATE
SECTION
CINCINNATI, OHIO
MFG., INC.
MANUAL OVERRIDE SYSTEM
Should an electrical failure occur, your Venturo crane can be operated manually. The manual overrides are
intended for emergency use only and should not be used for normal operation.
To operate in manual override mode:
(1) Override the safety shutoff or proportional valve by turning the red stem on the valve as stated below.
Non-proportional system:
For override operation, press stem in and rotate counterclockwise until it stops.
To return to normal operation, press stem in and rotate clockwise until it stops.
Proportional system:
For override operation, rotate stem clockwise (the farther the stem is turned the faster the crane will
operate).
To return to normal operation, rotate the stem counterclockwise until it stops.
(2) Determine the coil/override associated with the function you wish to operate, then insert a small diameter
object (an allen wrench works well) into the detent on the end of the valve stem and press firmly inward. For
example, pushing the stem labeled A on the first bank (refer to the illustration) will actuate winch down.
WARNING! For normal crane operation, the safety shutoff or proportional valve must be in the “normal” position
(as described above). Test the crane before each use by placing the power toggle switch or trigger in the “OFF “
position and testing each crane function
using the manual overrides. If any crane function operates, verify that
the red stem on the safety shutoff or proportional valve is in the normal position then retest.
EMERGENCY STOP
In the unlikely event that a function of the crane does not stop once the function’s toggle switch is released, the
Non-proportional crane can be stopped by simply toggling the power switch to the off (emergency stop)
position and the Proportional crane can be stopped by releasing the trigger.
System abbreviations are as follows:
WD – Winch Down
WU – Winch Up
RR – Rotation Right RL – Rotation Left
BI – Boom In (Ext.) BO – Boom Out (Ext.)
BD – Boom Down (Elev.) BU – Boom Up (Elev.)