Spicer Two-Speed Dual Range Drive Axles ® Driver Instructions AXDR0117 October 2007
Table of Contents Dual Range Driving ............................................................................... 1 Downshift Axle for More Power ............................................................. 1 Important Procedures to Remember ..................................................... 3 Dual Range Tandem Axle Features ........................................................ 4 Dual Range Axle Overview .....................................................................
Dual Range Driving Dual Range Driving From off-highway starting to rolling on the highway (with multispeed or automatic transmissions) 1. 2. 3. 4. Disengage the lockout . . . place the lockout selector valve in the UNLOCK position. Move axle selector valve to LOW range. Shift transmission to start truck. Driving off-highway . . . to keep the truck rolling on rough terrain and secondary roads, keep axle in LOW range and shift transmission to maintain desired road speed. Driving on highway . . .
Dual Range Driving Dana Lockout Selector Valve UNLOCK With lockout disengaged . . . axle can be operated in LOW or HIGH range. LOCK Inter-axle Differential For startability and off-highway driving, keep axle in LOW range. Dana Dual Range Tandem Selector Valve HIGH LOW Range Range Axle in HIGH range for on-highway driving.
Dual Range Driving Important Procedures to Remember • • • • • Shift axle at slower speed until you are accustomed to driving the vehicle. Park truck in axle in LOW range. Never engage lockout when wheels are spinning. Engage lockout only under poor traction. Do not operate truck on dry pavement with lockout engaged. Dana Lockout Selector Valve UNLOCK With good traction, keep lockout disengaged. Drive with axle in LOW or HIGH range.
Dual Range Driving Dual Range Tandem Axle Features Driving a truck in heavy-duty, on-off highway operations is a pleasure with the Dana Dual Range concept. Two axles-in-one give you flexibility for easy driving, productive hauling regardless of operating conditions. Power when you need it; speed when you want it. The Dana dual range axle is designed to provide deep-hole reduction for power in off-highway driving and fast ratio for top speeds on the highway.
Dual Range Driving Dual Range Axle Overview When the axle selector valve lever position is changed, an air-operated shift system goes into action. A piston air-shift unit mounted in the axle does the work. When air pressure is applied to the piston, it shifts the axle from one range to another. A heavy-duty compression spring assures rapid return action when air pressure is released. Shifting within the axle is accomplished through Dana exclusive clutch gearing designed for fast, smooth shifting.
For spec‘ing or service assistance, call 1-877-777-5360 or visit our website at www.dana.com Dana Commercial Vehicle Products Group 3939 Technology Drive Maumee, Ohio, USA 43537 www.dana.com All applications must be approved by the Application Engineering Department. Specifications and/or design are subject to change without notice or obligation.
