Bobcat has launched a new version of the company’s top-of-the-range T870 compact tracked loader featuring a new torsion suspension undercarriage, replacing the previous T870 model with a roller suspension system.

Introducing a completely new undercarriage design to Bobcat compact tracked loaders, the torsion suspension undercarriage features torsion axles that dampen vibration, combining the comfort of roller suspension and the stability of a solid mount undercarriage with other new features to provide a tracked loader that outperforms all other machines on the market.

The new T870 torsion suspension machine offers 10% more lift capacity than the previous roller suspension model. It is available with a wide range of standard and optional features and in a range of configurations to match emissions and specification requirements for all European, Middle East, Africa and Russia and CIS markets.

The 5-link torsion suspension undercarriage minimises rocking when lifting a load high or when performing grading tasks. With the new Bobcat undercarriage, there is no trade-off between comfort and performance. An additional link on the rear axle stabilises the system to decrease rocking or bouncing and increase productivity.

The unique fifth link acts like an independent suspension, increasing ride comfort and greatly reducing the rocking effect that is typically associated with torsion suspensions. Equipped in this way, the Bobcat T870 compact tracked loader feels even more stable and grounded, which improves ride quality and delivers unmatched performance when lifting and grading.

The larger rear idler is positioned further back within the undercarriage system, allowing for greatly increased downward force to the cutting edge of the bucket or attachment. The added diameter of the new rear idler provides optimal contact with the track, which maintains tension and protects against de-tracking.

Longer tracks provide increased flotation and reduced ground pressure, by increasing surface area and ground contact for better flotation, ride quality and improved performance in soft conditions.

Auto track tensioning increases uptime by automatically ensuring the proper track tension. This eliminates the need to manually adjust the loader’s track tension with a grease gun and provides consistent tensioning to minimise the chance of loosening and de-tracking in tough working conditions.

The durable design of the new T870 model further improves uptime performance, with forged steel idlers guiding and supporting the track around the ends of the undercarriage. The solid steel design of the idlers ensures they stand up to harsh operating conditions. Hydraulic hoses are carefully routed and protected inside the undercarriage. This durable design keeps hoses free from snags and obstacles on the job site, preventing costly downtime.

The self-contained axle system contains an inner bar surrounded by four rubber cords. The inner bar is heat-treated for maximum strength, which translates to increased longevity and more uptime. Undercarriage bushings and seals are made with high-grade, high-quality steel for maximum durability. Five easy-to-access grease zerks ensures regular greasing is an easy and simple process. They are also recessed for protection from job site objects and debris.

An open shape design improves ease of clean-out and debris shedding. A horizontally mounted hydraulic track tension cylinder opens more room between the carriage and the track for easier clean-out. The undercarriage is sloped on both sides to shed material, such as sand, dirt, mud and debris better than the previous design. Additionally, raised cut-outs between the rollers allow for easier cleaning. A new roller clean-out opening provides additional access to clean mud, dirt and debris from the undercarriage.

Increased durability and reliability result from a cast front roller and idler mount, which bear much of the load when pushing and lifting. Where other manufacturers rely on layered, welded steel, Bobcat undercarriages have a solid, cast-steel front roller and idler mount design. This eliminates welds and distributes stress across one seamless component that has additional metal and strength precisely where it is needed most.

The new Bobcat drive motor is more reliable and it is easier to maintain than ever before. The outer bearing life has been improved dramatically thanks to continuous lubrication from oil in the hydraulic system. The diameter of the drive shaft inside the gearbox is also 15% larger than before, which greatly enhances durability. The outer cavity reservoir housed within the new drive motor is now easier to flush and fill with the addition of two service ports that can be accessed without removing the track or sprocket.

The T870 loader is intended to run the most powerful attachments from Bobcat such as wheel saws to cut trenches for cable/pipe laying (including the WS32 wheel saw providing an 80 cm dig depth) and the highly productive forestry cutter attachment. As well as work with these powerful attachments, the high productivity of the machine provides new solutions for other demanding applications such as ship trimming, grading, lifting, planing, landscaping, trenching, rental, construction and demolition.