Vibration pumps/valves
The equipment for excavators and backhoe loaders that makes the difference!
DYNASET HVB Hydraulic Vibra converts the hydraulic power of a mobile machine into vibration power.
When activated, the HVB starts to move rapidly back and forth to the cylinder, creating vibrations on the attachment. It enables applications for smaller machines (<10 tonnes) that are only possible with large machines (30 tonnes <).
It is an effective tool to improve penetration in frozen ground, pile driving, emptying catch basins, cutting asphalt and compacting soil.
HVB is powerful, reliable and safe for the base machine and puts less strain on the boom than, for example, a hydraulic hammer or rock breaker.
Field report:
Hollola Church purchased a new, sub-four tonne Hitachi ZX33U equipped with Dynaset HVB Hydraulic Vibra and Engcon EC204 tilt rotator.
The HVB Hydraulic VIBRA is their first. Church gardener Kari Sinisalo had the idea to buy the hydraulic vibra.
"The main idea was to improve digging when the ground is frozen. Soil thawing is often used in frosty ground, but the hydraulic HVB-VIBRA speeds up the work and makes digging even easier. A ripper is practical for the frosty corners of the trench. When only one operator is working, the hydraulic VIBRA makes the work easier," says Sinisalo
The hydraulic HVB-VIBRA helps with digging when there are thick roots in the ground. The excavator chains do not damage the turf when the weight of the machine does not need to be used to increase the power of the bucket. The VIBRA also offers a simple method of compacting the soil of the trenches. In addition, vibrations effortlessly remove the clay soil from the bucket.
Flexibility with HVB Hydraulic Vibra
The Hitachi 33U joystick contains buttons and rollers. Dynaset HVB Hydraulic Vibra is activated via a button on the right joystick and its frequency is adjusted linearly via a roller on the left joystick. In this way, they get full power for the screening bucket and less power for compaction when repairing the turf.
"We use our machines for almost fifteen years before we renew them, so we can fully equip them when we buy them. As a result, we don't fall behind when working methods evolve," explains Sinisalo.
Simple installation
The product included the VIBRA pump, hydraulic hoses and valves that adjust the vibration frequency linearly. The vibration functions are programmed to a button and a roller with the excavator's joysticks. In this case, the power of the hydraulic VIBRA is taken from the Hitachi hammer line using a valve. The valve is located on the other side of the boom where the VIBRA pump is installed. In addition to the main components, the installation included five hoses, a 12 V cable and, of course, testing the equipment.
User comments
The main user of the excavator is Markku Helander, who has experience with different types of machines.
"We've had the new excavator for a few weeks. The equipment plays a major role, especially in winter. This excavator has an Engcon tilt rotator attachment and a Dynaset HVB Hydraulic Vibra, which make work easier and faster, especially in difficult situations," says Helander.
The dimensions of the trenches must be precise. When digging through frosty ground and rootstock, all methods of facilitation are welcome. I have mostly used the Dynaset's hydraulic vibra with the sieve bucket to compact the soil and cut the surface of the turf. The linear adjustment of the vibration makes the HVB very useful. The 18.8 kW Hitachi engine generates enough hydraulic power for the equipment," continues Helander. Hydraulic vibra to improve excavation, providing vibration for screening the bucket The vibration is activated and adjusted via the joystick. The Hollola church uses the DYNASET HVB hydraulic vibra