how adj manual steering box?
In my opinion if the box exhibits the behavior above due to ware it can no longer be properly adjusted and one or both of the ballnut and sector are scrap. that's not going to be a nice drive if it has to be loose in the middle. sector on left New, sector on right from box that can not be adjusted to work right. With an unworn sector the more off centre the box is, less of the width of the teeth is into the v section of the ballnut tooth profile, hence the looser it gets. with the one on the right you are jamming the peak of each tooth into the base of each valley of the ballnut and it wears a groove into the sides of each valley. Hence worn out scrap.. The ballnut is a linear rack and the sector is a 60 degree quadrant of the circle. the best mesh is bang on the centre. tight there, means less ware and not so loose when you go round a corner.
shown also LHD and RHD ballnut and screw 24:1 top 20:1 lower.
parts for HD rebuild, note tall bearing mid left, used as upgrade for bottom sector position and the ball bearings in cages that you load up when setting the worm screw bearing pre-load. go too far and you bust the cage.
part numbers visible fo bearings and seals in you zoom in :)
In my opinion if the box exhibits the behavior above due to ware it can no longer be properly adjusted and one or both of the ballnut and sector are scrap. that's not going to be a nice drive if it has to be loose in the middle. sector on left New, sector on right from box that can not be adjusted to work right. With an unworn sector the more off centre the box is, less of the width of the teeth is into the v section of the ballnut tooth profile, hence the looser it gets. with the one on the right you are jamming the peak of each tooth into the base of each valley of the ballnut and it wears a groove into the sides of each valley. Hence worn out scrap.. The ballnut is a linear rack and the sector is a 60 degree quadrant of the circle. the best mesh is bang on the centre. tight there, means less ware and not so loose when you go round a corner.
shown also LHD and RHD ballnut and screw 24:1 top 20:1 lower.
parts for HD rebuild, note tall bearing mid left, used as upgrade for bottom sector position and the ball bearings in cages that you load up when setting the worm screw bearing pre-load. go too far and you bust the cage.
part numbers visible fo bearings and seals in you zoom in :)