Independent Pre-Screen Optimizes MOBICAT MC 120 Z Performance


April 19, 2010

Kleemann’s flagship MC 120 Z track-mounted jaw crusher is a robust machine that offers high productivity, durability and ease of operation. The jaw is driven by a powerful 215 hp direct electric motor, providing high capacity crushing with efficient fuel consumption.

Independent Pre-Screen

The MOBICAT MC 120 Z has a two-deck, fully independent pre-screen which can be fitted with punch sheet, grizzly and wire mesh. This allows for prescreening before crushing, or removal of unwanted scalps.

Kleemann’s fully independent pre-screen provides effective screening to remove fines or contaminants in all crushing applications. It’s important to consistently feed the crusher with a steady flow of material and only send to the crusher material that needs to be crushed.

Both the Kleemann Mobicat and Mobirex range of crushers offer this fully independent double-deck screen before the crusher. The top deck can be fitted with an elongated grizzly or a punched sheet; this separates the feed material allowing the oversize product to feed into the crusher and the under size product to pass to the second screen deck.

On the second deck a wire mesh can be fitted to suit the application. The oversize material on this deck is bypassed around the crusher and the undersize product is conveyed to the stockpile. A sized, graded product can be produced from the pre-screen, and in many applications, this will increase the crusher’s overall performance and efficiency.

Feeder Below Crusher Minimizes Belt Wear

Like other Kleemann products, The MOBICAT MC 120 Z crusher is fitted with a lined, heavy duty vibrating feeder below the crusher. Kleemann’s feeder below the crusher eliminates belt wear by impact or metal damage when crushing.

While it’s important to feed the crusher uniformly and consistently, it’s possibly more  important that below the crusher, the material is removed quickly, with no blockages or constraints. Down time due to belt damage and blockages are common on mobile crushers, but with the Kleemann design, downtime is dramatically reduced, allowing for better productivity.

Diesel-Electric-Hydraulic Power is Reliable and Economical

The MOBICAT MC 120 Z’s diesel-electric-hydraulic power is reliable and economical. In today’s  quarry and contractor operations, one of the major operating costs is fuel. To help minimize operating costs, independent of a unit’s drive system, all Kleemann plants utilize an onboard diesel-electric generator, which is used to drive conveyor belts, vibrating chutes and screens.

This generator is generously sized, with a water-cooled diesel engine with turbo power, enclosed in a sound-suppressing housing around the entire unit. Special cooling and heating systems are available for extreme climates.

Benefits of the system to the owner are low fuel consumption, low noise and environmental impact, excellent protection against dirt and the weather, and easy accessibility for maintenance.

The excess capacity of the generator can be used for the operation of additional equipment, such as stockpile conveyors, or screens, which means less money is spent on additional power plants and operations. Simultaneously, electrical tools such as impact guns, compressors, welding sets or lamps can be powered by the plant.

Kleemann’s Roots Run Deep

Kleemann is a newcomer to the North American aggregate processing market, but its roots lie deep. Established in Germany in 1857, Kleemann was acquired by Wirtgen Group in 2006. Today, a growing network of equipment distributors and dealers is enabling Kleemann Inc. USA to boost its domestic profile and serve customers in North America.

Today Kleemann manufactures and markets a broad range of durable, productive mobile and stationary processing technology for crushed stone, demolition waste and mixed construction waste.

Kleemann’s product brand names are:

o The MOBICAT mobile primary jaw on crawler chassis with feeding unit, pre-screen and conveyors built in various sizes ranging from 100-1,000 tph capacity

o The MOBIREX mobile primary impactor on crawler chassis with feeding unit, pre-screen and conveyors built in various sizes ranging from 100 to 1,000 tph capacity

o The MOBIFOX mobile secondary crushing machines with feeding unit, impact crusher and a screen producing up to 3 grain sizes

o The MOBICONE mobile secondary crushing machines with feeding unit, cone crusher and a screen to produce up to 3 grain sizes, and

o The MOBISCREEN mobile screening machines, producing up to 4 grain sizes with fixed or swiveling discharge belts, with a screening surface dependent on ultimate use.


Wirtgen America, Inc., Nashville, is the North American arm of the Wirtgen Group, the single-source marketer of the world’s most technologically advanced lines of asphalt reclaiming and recycling equipment from Wirtgen, asphalt and soil compactors from Hamm Compaction Division, asphalt pavers from Vögele America Inc., and construction materials processing equipment from Kleemann.

In late 2004 Reinhard Wirtgen, founder of Wirtgen Group, was honored as one of the “Top 100 Private Sector Transportation Design & Construction Professionals of the 20th Century” by the American Road & Transportation Builders Association (ARTBA).

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