Better reversing control of large earthmoving machines to boost productivity

Transmission manufacturer, Allison, has introduced a second deeper reverse gear on its 4700 and 4800 models which gives machinery drivers better control.

LONDON - 

As part of an ongoing product optimisation initiative, Allison Transmission has introduced a second reverse gear on all its 4700 and 4800 models for the 2010 model year. This offers a second `deep reverse' in addition to the standard reverse to provide greater control and engine braking during operation on steep grades. 2nd Reverse should also enable increased manoeuvrability when operating in confined spaces, allowing quicker operation cycles and thereby boosting productivity performance.

"Customers in mining in particular, will appreciate the provision of a deeper reverse gear," says Larry Love, Allison Executive Director of International Marketing. "The shorter ratios of 2nd Reverse will make up and downhill reversing much safer and easier in heavy duty applications, giving drivers additional confidence. This is another reason to specify an Allison fully automatic transmission, complementing features such as our adaptive Electronic Control Systems and integral retarder that aim to improve comfort and productivity for drivers and operators."

When a vehicle is in 2nd Reverse, it will have a slow creep capability with high engine speeds. With a mechanical ratio of 17.12, it will have an effective torque converter multiplied ratio up to 32.5:1. The new 2nd Reverse feature provides overall better performance and enhanced applicability for a variety of applications.

John Chadwick is editor/proprietor of International Mining magazine - www.im-mining.com

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