Friday, June 30, 2006

Transmissions, axles for heavy trucks - Meritor Automotive Inc.'s new planetary axles

Meritor Automotive has made its Engine Synchro Shift transmission system available for all heavy trucks and tractors with Caterpillar and Cummins engines. Previously the ESS system was only available with Detroit Diesel engines. The system is available through North American truck OEMs when spec'd with a 9- or 10-speed Meritor transmission.

Meritor has also unveiled new planetary axles - the SPRC-4808 tandem axle and the PSC-1876 steering axle - designed to meet high torque capacity demands of the heavy-duty dump truck market. The SPRC-4808 tandem axle, which replaces the SPRC-4806, is the largest torque capacity tandem planetary axle offered by Meritor. The axle features RT-380 carriers and increased torque is achieved through a larger ring gear, upgraded housings and upgraded planetary wheel-end gearing. The axle also offers standard oil pump and filter on the forward carrier and optional pump on the rear carrier to provide positive lubrication for severe operations on long grades at low speeds.

The PSC-1876 planetary front steer axle, an upgrade to its PSC-1875 axle, provides improved vehicle handling and reduced steering effort by offering a high minimum steer angle of 29 [degrees], up to 35 [degrees] is possible depending on vehicle application. The axle also features a 7 [degrees] inclined kingpin and a 3 [degrees] caster for improved steering capability both on- and off-road. The axle features Meritor's RS-160 carriers which are designed for on- and off-highway applications and increase the ability to pull high GCW requirements in severe-duty cycle applications versus normal 6 x 4 applications.

The PRC-7534 series planetary rigid axle is available as a step up from the PRC-5334 series axle. The new axle is engineered for the heavy-duty industrial lift truck market and covers a broad range of lift truck applications including large container handlers and log loaders. The axle has a capacity range of 170,000 to 245,000 lb. with a wide selection of gear ratios, load capacities, brakes and vehicle mountings for varying performance characteristics.

The axles come standard with Meritor's 17 in. wet disc brakes, which provide maximum life with minimum maintenance. The wet disc brake is also available with optional force cooling ports, which allow the use of auxiliary cooling for severe-duty cycles. Operators can spec easy-to-service wheel-speed dry disc brakes as an alternative to the wet disc brakes.


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