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4000 Series Steerable

4000 Series Steerable

The AxleTech 4000 Series planetary steerable axles are engineered to meet the increasing demands of the 4x4 and 6x6 high-mobility tactical, airport fire crash rescue, snow blower, airport service vehicles, dock side tow tractors, multi-axle mobile cranes, and heavy duty specialty type vehicle vocations. This axle has a vocationally dependent axle load rating of up to 19,800 lb (9,000 kg). 

A wide range of overall axle ratios, load capacities, vehicle mountings, carrier offsets, and brakes for performance characteristics are available to match your specific vehicle installation requirements. The 4000 series axle has common wheel mounting capability with the 4000 series rigid as well as other axles of the 3000/5000 series families, brake option and selected hub mounting dependant. Standard features include a choice of multiple planetary hub reductions that provide an overall axle ratio range from 4.80 to 8.73 offering maximum flexibility to meet your desired performance and optimize the vehicle performance. Maximum steer angles up to 42 degrees are possible depending on shaft assemblies and knuckles fitted in the axle assembly. The 4000 series steer axle has 7 degree inclined king pins and up to 2 degrees of camber built in to provide improved on paved surfaces handling. The axle housing has been designed with opportunity for lower vehicle height installations by reduction of the top and bottom of axle housing in the carrier bowl area to improve both vehicle body area above the axle bowl and increased ground clearances in on/off road applications. 

Multiple axle options include many features to permit optimization of this steer axle family to customize the axle for your specific vocational requirements. Outboard mounted brake drums have been designed to permit easier serviceability without requiring the planetary hub reduction to be disassembled to perform normal brake maintenance. Wheel mounted ABS is also an available option for the on road vehicle vocational requirements. A central tire inflation option is available for those vehicles demanding increased floatation in the various rugged off road vocational duty cycles. Carrier differential options include air actuated differential lock, limited slip,and a wide range of input flanges sizes and styles. 

Multiple axle pad mounting styles are available with location flexibility on the high strength fabricated axle housing design utilized by this family of steer axles. Steering tie rods can be fitted either above or below carrier pinion input depending on brake type selected and will help protect this component from external damage in the off road environment. AxleTech planetary axles are tough, dependable, and thoroughly proven under the most severe conditions.

Technical Specifications
  • Capacity
  • 19,800 lb / 9,000 kg
  • Housing
  • Cast steel
  • Differential
  • With driver-controlled lock (DCDL) or limited slip
  • Final ratio
  • 4.80, 5.05, 5.33, 5.65, 6.00, 6.40, 6.86, 7.38, 8.00, or 8.73
  • Flange to flange
  • 87.95 in / 2,234 mm with drum brakes or 88.86 in / 2,257 mm with disc brake
  • Brakes
  • Wedge, s-cam, or air disc
  • Wheel mounting
  • Hub piloted, 10 studs, 13.19 in / 335 mm bolt circle
  • Minimum wheel size
  • 20 in / 508 mm
  • Typical axle weight
  • 1,572 lb / 700 kg
  • Typical oil capacity
  • 21 pt / 10 L to 31.5 pt / 15 L