Venturo HT50KX, Инструкция по установке и эксплуатации

Страница: 24 / 52

EXPLANATION OF HYDRAULIC VALVE SYSTEM
OVERVIEW
This proportional crane utilizes a proportional valve, which controls the rate at which the hydraulic fluid flows
through the valve bank. When the proportional valve is fully closed, hydraulic fluid bypasses the valve bank and
returns directly to the tank. When the proportional valve is fully open, hydraulic fluid cycles through the valve bank
and allows the crane to function at full speed. When the proportional valve is at any setting between, a portion of
the fluid is allowed through the valve bank, with the remainder returning directly to the tank.
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”).
22168
C200
-
5-26-05
HYDRAULIC SYSTEM
HT40/50 - PROP
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 proportional valve by turning the red stem on the valve as stated below.
- 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 up.
Warning! For normal crane operation, the proportional valve must be in the “normal” position (as described above).
To verify “normal” operation, you may set the pendant (or radio) control aside and actuate a single crane function by
pushing “in” on any of the manual override pins, located at the ends of each function control valve. If that function
operates, the proportional valve is still in manual override. Check the position of the proportional valve “red thumb
screw” to insure that it is fully counterclockwise.
EMERGENCY STOP
In the unlikely event that a function of the crane does not stop once the function’s toggle switch is released, 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.)
PROPORTIONAL VALVE
RIGHT SIDE VIEW
LEFT SIDE VIEW
RED STEM