Venturo’s hydraulic cranes are available in two [2] general configurations:
Proportional and
Non-Proportional. The
Non-Proportional configuration (see fig. 1) utilizes a safety shut-off 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 shut-off valve is not actuated. When the safety shut-off 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 shut-off 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 [4] crane functions (winch, rotation, boom elevation, and boom extension) are controlled by four [4] separate valve sections. Each valve section has two [2] solenoid coils (and two [2] 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’).

Fig. 1
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:
- Override the safety shut-off 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 counter-clockwise 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 turns, the faster the crane operates). To return to normal operation, roate stem counter clockwise until it stops.
- 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. For example, pushing the stem labeled ‘A’ on the first bank (refer to illustration in Fig. 1) will actuate winch down.

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.