All-wheel steering is a chassis configuration in which all four wheels of a machine turn, rather than only the front axle as in conventional steering systems. By coordinating the angle of both front and rear wheels, the system reduces the turning radius significantly compared with front-wheel-only steering, allowing equipment to maneuver in confined yards, narrow lane closures, or tight indoor spaces. The technology is most commonly found on wheel loaders, telehandlers, and increasingly on compact backhoe loaders used in dense urban environments.
How All-Wheel Steering Works
In machines equipped with all-wheel steering, hydraulic or electro-hydraulic actuators control the rear axle in coordination with the front axle. Operators can typically switch between multiple steering modes depending on the task: two-wheel steering for standard road travel and stability at higher speeds, four-wheel (all-wheel) steering for the tightest turning circles, and crab steering, which moves all wheels in parallel to shift the machine sideways without changing its heading. This mode selection gives operators flexibility to match maneuverability against stability requirements depending on ground conditions and surrounding obstructions.
Applications in Wheel Loaders and Telehandlers
On telehandlers, particularly rotating models with 360° turrets, all-wheel steering is paired with crane, forklift, and aerial work functions. As described in our article on rotating telehandlers, three steering modes—two-wheel, four-wheel and crab—improve maneuverability in confined spaces, while all-wheel steering tightens the turning circle without sacrificing stability on open ground. This combination is particularly relevant on sites where the telehandler must reposition frequently between lifting, loading, and material-handling tasks without the space for wide turning arcs.
Backhoe loaders operating in roadbuilding and urban reconstruction projects have also adopted all-wheel steering as a standard feature. According to our article on backhoe loaders in roadbuilding, modern units feature all-wheel drive and all-wheel steering modes for enhanced maneuverability on narrow construction sites, where space constraints prohibit the use of separate excavators and wheel loaders. This allows compact backhoe loaders to work within single-lane closures while maintaining safe clearances to passing traffic.
Maintenance Considerations
All-wheel steering systems add hydraulic components and linkages beyond those found in conventional front-wheel steering, which can influence service schedules. As noted in our article on rotating telehandlers, maintenance on diesel rotating telehandlers typically follows engine-hour schedules similar to those of excavators, with hydraulic oil, filters, and greasing points requiring attention every 250 to 500 hours. Since all-wheel steering relies on additional hydraulic circuits for rear-axle actuation, these service intervals are relevant for planners and fleet managers budgeting for total cost of ownership.
Coverage in This Publication
All-wheel steering has been addressed in the context of two equipment categories on this platform. Our article on rotating telehandlers, "Rotating Telehandlers: How 360° Turrets Combine Crane, Forklift and Aerial Work," examines how the three available steering modes—two-wheel, four-wheel, and crab—affect maneuverability and stability during crane, forklift, and aerial work operations (/articles/rotating-telehandlers-how-360-turrets-combine-crane-forklift-and-aerial-work). Separately, our coverage of compact backhoe loaders, "Backhoe loaders gain traction in roadbuilding – Ausa targets compact segment," discusses how all-wheel steering modes support operation on narrow urban road reconstruction sites (/articles/backhoe-loaders-gain-traction-in-roadbuilding-ausa-targets-compact-segment).
