SECTION
Adjusting Caster Headtubes
NOTE: For this procedure, refer to FIGURE 8.3.
NOTE: Caster headtubes that are perpendicular to the floor will roll better, track straighter and minimize any ʺ3‐wheelingʺ of the wheelchair.
1.Make sure the wheelchair is on a flat surface.
2.Loosen, but do not remove the top mounting screw and locknut, which holds the adjustment cam in place, and secures the caster headtube to the headtube mounting plate.
3.Position a large right triangle or ʺLʺ square on the flat surface and against the caster headtube.
4.Move the caster headtube back and forth until the caster headtube is perpendicular to the ground/floor.
5.While holding the caster headtube perpendicular to the ground/floor, securely tighten the top mounting screw securing the adjustment cam in place to the headtube mounting plate.
6.Make sure the caster headtube is still perpendicular to the ground/floor by placing the large right triangle or ʺLʺ square on the flat surface and against the caster headtube.
7.Securely tighten the bottom mounting screw and locknut that secure the caster headtube to the headtube mounting plate.
Adjustment Cam
Caster Headtube
Caster/Fork
"L" Square