The 621 model trommel from McCloskey International has been updated to provide ground-level access to the common service points for equipment technicians, allowing faster, simpler maintenance and improved safety on the work site.

The new 621 trommel implements design changes developed by McCloskey engineering for the 733 4x4 trommel last year. While the 621 model is one of the most popular high-production wheel-drive trommels, featuring the McCloskey Drum X-Change System, the 733 model was introduced in 2007 as the world’s largest wheel-drive units.

The Drum X-Change System replaces traditional chain drives with a trunnion-based wheel drive, allowing operators to simply lift out one drum and drop in another to change screens. Eliminating the chain drive also eliminates the most costly service item from the trommel maintenance schedules.

According to Andy Krol, chief engineer of the McCloskey Trommel line, “… with the chain drive out of the way, we were able to relocate the engine compartment and the diesel tank down to ground level. In previous machines, technicians needed to climb a ladder to perform basic service such as checking the oil and changing filters. Simply moving the engine lower provides a valuable improvement in service times and safety.”

The 621 trommel has now been reconfigured to offer the same accessible “engine down” design as the 733 model and, like the 733, provides room for technicians to stand upright in the engine compartment as they service the machine. Ground-level controls for the trommel’s brush adjusters also allow operators to complete this routine adjustment without having to climb up on the equipment.

Additional features of the updated 621 trommel include:

• Tier III-compliant C6.6 Caterpillar power plant for lower emission engines; equipped with LCD display and automatic emergency shutdowns

• Increased performance with lower dust for reduced maintenance to engine air cleaners and filters

• Increased drive torque efficiency providing increased fuel economy and lower operating cost

• 320 gal. (121 L) fuel tank provides capacity for weekly fill-ups versus daily refueling

• Increased drum wall clearance lets material fall easily to the fines conveyor; reduces friction to require less power and, in turn, uses less fuel

• Improved jacking points with legs that drop down with more height settings for easier leveling

• All valves are behind a valve plate for enhanced safety in the event of a blowout; easier to focus on controls in a panel style machine

• New gearbox for internal feeder with fewer moving parts achieves longer life

• Feeder hopper extension over the engine end of hopper increases hopper capacity and allows feeding with a loader bucket

The new 621 trommel screener is suited for large heavy duty applications where production rates can reach 200 tph (181 t) in topsoil and sticky material or 300 tph (272 t) in sand and gravel.

For more information, call 877/876-6635 or visit www.mccloskeyinternational.com.

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