Venturo ET12KXP-16, Owner'S Manual

Page: 33 / 64

SECTION DATE
SUPERSEDES
TITLE
ET6/8/12 SERIES CRANES
C200
03-08-19H
07-30-18G
INSTALLATION DWG
900530B
CRANE OPERATION AND MAINTENANCE INSTRUCTIONS
CONTROL FUNCTIONS
WINCH UP and WINCH DOWN - Raises and lowers the load with the wire rope.
POWER EXTENSION - "Up" raises the boom elevation by operating the valves and the electric hydraulic power unit.
"DOWN" operates a solenoid release valve mounted on the cylinder to lower the load and/or boom by gravity at a
controlled rate. A check valve on the cylinder prevents the boom from coming down if a hose breaks. A flow control valve
controls the lowering rate.
POWER ROTATION - "L" and "R" control the direction of rotation. The ET6K, ET8K(X), ET10K(X) or ET12K(X) can be
rotated continuously thru 360° or more. There are no restrictions on the number of rotations in any direction.
CONTROL PRIORITY SYSTEM (NON-PROPORTIONAL SYSTEMS) - As a built in safety feature, the operator can
perform only one major and one minor function at any one time. Major functions include rotation, winching up of a load,
and elevating, extending, and retracting the boom. Minor functions include winching down and lowering the boom.
a. "WINCH UP" has priority over "BOOM UP", "BOOM OUT", "BOOM IN", and "ROTATION."
b. "BOOM UP" has priority over "BOOM OUT", "BOOM IN", and "ROTATION."
c. "BOOM OUT" and "BOOM IN" have priority over "ROTATION."
d. "BOOM DOWN" and "WINCH DOWN" can be operated with any function.
TRIGGER (ET12KXP Only) - Varies the flow rate delivered to the crane valve. The farther the trigger is pulled, the faster
the selected crane function operates.
OVERLOAD SENSING SYSTEM
This crane is equipped with an Overload Sensing System. If the capacity of the crane is exceeded, the "Winch Up",
"Boom Down", and "Boom Out" functions will be shut down. The "Winch Down", "Boom Up", and "Boom In" functions will
continue to operate and can be used to relieve the overload condition. The "Rotation" function also will continue to
operate.
TWO-BLOCK SENSING SYSTEM
This crane is equipped with an anti two-block device that is mounted at the tip of the boom. If the load block / overhaul
weight contacts the device the "Winch Up", "Boom Down", and "Boom Out" functions are disabled. The "Winch Down",
"Boom Up", and "Boom In" functions will continue to operate and can be used to relieve the two-block condition.
CRANE OPERATION
Avoid rapid reversal of the winch and rotation control switches. The high inrush current to the motors during reversal can
reduce the life of the contactors, motor brushes, and commutators.
When operating "WINCH UP", "BOOM DOWN", or "BOOM OUT," always maintain clearance between the boom head and
the load block or hook.
Do not lift or drag a load sideways using any of the crane funcitons. The boom has much lower bending strength sideways
than in a vertical direction.
®
VENCO VENTURO INDUSTRIES LLC
CINCINNATI, OHIO