Two tractors were used on this narrow gauge road-rail line, both steam-powered and both rebuilt by the Britannia Engineering Works of Johannesburg from Yorkshire Patent Steam Wagon Company steam tractors [REF].
No. RR973 was rebuilt to a road-rail tractor with a wheel arrangement similar to that of the prototype Dennis road-rail tractor, but fitted with jacks at the front to allow a separate bogie to be manoeuvred into position underneath the front axle without the need for ramps.