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Wheel assist ( Power wheel) drive systems

There are many types of off-road machinery which are either towed by a prime mover or driven by two of four or more wheels. When ground conditions are good, these machines can carry out their function satisfactorily, but when the ground becomes soft or slippery, the prime mover or main drive wheels lose traction and the machine cannot operate. Under these conditions, applying drive to the otherwise non-drive wheels of the towed equipment results in a huge improvement in tractive capacity and in productivity of the machine
Randall Hydraulics has designed and manufactured hydraulic drive systems for previously non-driven wheels on off-road machinery, usually including all associated hydraulic and mechanical componentry and steering systems. Such systems have been installed on harvesting equipment for potatoes and other crops, and on bulk trailers.
Photo above shows a typical drive hub which includes a direct drive high torque wheel motor and steerable king-pin mounting bracket. This hub will freewheel, and drive can be engaged at the turn of a swich.
Wheels, motors and steerable mounting brackets prior to packing
for shipment to a customer
Photo above shows a steer-drive axle designed and manufactured by Randall Hydraulics, which, like our individual steer/drive hub, will switch instantly from freewheel to drive mode and back to freewheel.


Copyright Randall Hydraulics Pty Ltd 2006


Randall Hydraulics


Rotary Power

axial piston pumps and motors
chemical metering pumps
radial piston high torque motors
heavy duty high torqe motors
medium duty cam ring motors

Parker Hannifin

Product range
Gear pumps and motors
Mobile ontrol valves
Sectional control valves and
remote control,systems
Bent-axis pumps and motors
Truck pumps
Bent-axis pumps and motors
Variable displacement,
bent-axis motors

Truck PTOs and pumps

Truck PTOs and pumps

Sundstrand, Sauer and

20 Series axial piston pumps
and motors
40 Series medium duty, axial
piston pumps and motors
51 Series bent-axis motors
90 Series axial piston pumps
and motors





Other Brands

High torque wheel &
shaft motors
Hydrostatic drive systems,
pumps and motors
High torque motors
High torque motors

Contact us at:

Randall Hydraulics Pty Ltd
34 Buch Avenue
Epping Victoria 3076

Tel. 03 9408 9933
Fax. 03 9408 9944