While similar to other ALLU buckets, the D Series is based on a completely new design and bucket attachment, offering the same level of productivity as a mobile screening system.

ALLU Director David MacLynn says “We have reintroduced the disc in disc drum design first used by ALLU many years ago, to enable the buckets to screen material below 15 mm.”

Mr MacLynn says that this was completed specifically with pipeline projects in mind, where screened material to pad the trench must not exceed 19 mm.

The D Series includes twelve different models that can be mounted either on an excavator or a wheel loader. Customers can choose whether to mount the attachment as a shovel or pick, with the dual adapter mounting allowing the bucket to be mounted in either position, depending on site conditions and the customer’s requirement.

Article continues below…

The D Series affords up to 200 cubic metres per hour production rate while providing additional saving and versatility benefits by attaching to the excavator. Environmental benefits are also gained due to the smaller machinery that can be used as opposed to larger mobile screening systems.

“One very large advantage is that you are converting a standard earthworks excavator into a processing and padding machine, which when not required for padding can be used for various other jobs on or after the project, upon completion,” says Mr MacLynn.

ALLU has carried out various sieve analysis tests with both crushed rock/concrete, compost sands and gravels, with the specific goal to ensure that all screened material from the 15 mm bucket would pass the requirements for pipeline contractors in Australia at 100 per cent under 19 mm.

“Over the many years, we have listened to the feedback requirements of pipeline contractors around the world, and especially in Australia.

“We have developed this new range of buckets with pipeline contractors specifically in mind, now providing a bucket which will produce exactly what they need, in the most efficient way possible, reducing costs and increasing profits.”

The company has optimised the D Series bucket design via a finite element method to ensure that it provides the strongest and most efficient design to meet:

  • Specification on material quality;
  • Optimised performance for output in cubic metres per hour for each class of excavator; and,
  • Reduced wear and running costs, both on the bucket, and fuel of the base machine.

The D Series bucket aerates, mixes and loads the soil during the excavating process, which ensures more even packing and compaction of the backfill material around the pipe.