This product is used for the following applications:

• Dam concrete placement

• Features

  Newly released are six models of the front assembly VB series, with the installable base machine being of the order of 7 or 13 tons. The number of vibrators provided varies: four, six, and eight. To improve concreting efficiency, the slewing system of the front unit, which allows the front vibrator to be arranged in different locations according to the situation of the concreting site to improve concreting efficiency, has been adopted. The hydraulic vibrator HIB150HDL used is a new product designed specifically for front assemblies applicable to circuit breaker circuits. For the specifications (such as oil pressure and oil quantity) for applicable hydraulic shovels, please consult our sales representatives. This is a dam-use labor-saving concreting machine operated by a single person, where a front assembly equipped with a powerful large hydraulic vibrator is mounted on a base machine owned by the client. Operation of the handheld vibrator does not require more than one worker. This product therefore saves labor and ensures efficient continuous concreting, thereby displaying its performance in concreting in dam construction.

  Versatile slewing front assembly

  The know-how accumulated in long years of dam concreting with Vibacks has been taken advantage of to adoptedize the slewing system of the front.
  Processes these days require concreting in vertically long, cramped spaces inaccessible with a transverse single-row array of vibrators, along with concreting in the lateral sides of the corners without moving the base machine. The operator can control the slewing of the front, efficiently pouring concrete.

  

  An operationally safer front unit

  The hydraulic piping of the front with a vibrator on it is of the manifold type, resulting in a reduced incidence of moving the hydraulic hose around and in a simple, thin shape. A more compact front improves the operator’s field of vision, while increasing safety in slewing the base machine.

  Labor-saving

  Conventional concreting practices used a handheld vibrator to pour concrete in cramped locations. The Viback front assembly has a powerful hydraulic vibrator that displays great performance. This, together with a slewing frame, saves labor.
  (In molds with their backs opposed to each other and other particular locations, a handheld vibrator may be needed. Prudent construction planning is therefore necessary.)

  Powerful, safe vibrating compaction

  Dam concrete is powerfully vibrated and finished as equally strong concrete by using a large hydraulic vibrator 150 mm in outer diameter to manage course aggregate (up to 150 mm) and low-slump concrete (0 to 3 mm).

  A highly abrasion-resistant vibrator tip

  Unlike ordinary concrete used in architectural and civil engineering works, dam concrete is hard and not fluid. During concreting and during the initial contact with rock, the vibrator tip becomes considerably worn.
  The tip is made of ductile cast iron subjected to special treatment, thereby ensuring high durability. (The tip alone can be replaced.)

  

  A damping structure with controlled vibration transmission to the base machine

  The unit has a unique dual damping structure where the powerful vibration of the hydraulic vibrator is prevented from reaching the front assembly frame or base machine connections.

  

  Hydraulic circuit

  To secure a required frequency for concrete placing, There is a flow control valve which can be easy adjustment.

  Hydraulic vibrator for the front assembly

  The inner vibrator used is a hydraulic vibrator HIB150HDL.
  This special-purpose front assembly machine has been enhanced to ensure applicability in circuit breaker circuits.
  *Please note that this unit is no longer compatible with the HIB150HL,which used to be used in conventional Vibacks.

  The base machine can be made versatile

  Your hydraulic shovel has been used to realize front assembly system for use as a dam concreting machine.
  At the end of the concreting, the unit can easily be put back into the backhoe.

  Specification

  Vibrator Specifications

  Model	Frequency （Hz）	CentrifugalForce （kN）	Maximum use pressure （MPa）	Oil flow rate （L/min）	Head length (dia×length) （mm）	Effecive range （m）	Weight （kg）
  HIB150HDL	117～133	13.6～17.8	20.6	14～16	Φ150×850	1.0	68

  (Imperial System)

  Model	Frequency （lbf）	CentrifugalForce （lbf）	Maximum use pressure （PSI）	Oil flow rate （gal/min）	Head length (dia×length) （in×ft）	Effecive range （ft）	Weight （lb）
  HIB150HDL	117～133	3,057～4,002	2,987	3.7～4.2	Φ5.9×2’9″	3’3″	149.9