Note - the springs used on this trailer are 610mm standard eye/slipper leaf springs. The position of the oscillator is the same if you are using different style springs. If you are using eye/eye springs, fixed suspension or torsion axles, use the oscillator centre position for the axle centre.
When setting up the springs, ensure that the outside face of the springs is flush with the outside face of the chassis rails along the length of the spring setup.
Before welding into position, check that the tail (slipper end) of the spring is located correctly and will not bind or fall out of the oscillator and slipper under normal operating conditions.
Tack weld the components to the chassis and check the oscillator action for correct operation. Adjust as necessary if any binding or stiffness occurs. Fully weld spring components when happy with their position.