8 Jockey Wheels are located in the four corners of each of the 2 side 'boxes'. These jockey wheels allow the whole box to be lifted above the ground in order for it to be maneuvered and for it to be expanded to its final position.
These jockey wheels have a 360degree pivot. They are vertically retracticable, meaning they can come up and down. They come up and down up using a manually winding jacking handle, which is a threaded worm within a casing. This gives it its vertical retractibility.
A bracket that is fixed to the side wall is solidly fixed to the casing.
Jockey Wheels
A jockey wheel is a retractable adjustable-height wheel used
on the front of trailers with either a single axle (two running wheels)
or more close-coupled axles at or near the centre of gravity
whereby without additional support, the trailer would not remain
'level'. The jockey wheel is situated close to the towing hitch and has a
built-in screw jack to enable the trailer nose to be lifted over the tow ball
of a car or other powered vehicle. The screw jack can then be used to
gently lower the trailer nose onto the tow ball. Once securely attached
to the towing vehicle, the jockey wheel's jacking action is fully
retracted for stowage. The jockey wheel is also unclamped and lifted as
far as possible to give the greatest ground clearance before reclamping
prior to a journey being made.
Jockey wheels incorporate a castor action, permitting travel in any direction while manhandling a trailer while it is not attached to a vehicle.
Closed
Elevated on jockey wheel so it is able to be easily moved before being lowered
Open
Elevated before being lowered
Lowered and jockey wheels removed
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