My headlights are blinding other road users and what I think are the adjustment screws do not seem to make any appreciable difference. I have half covered the lenses with insulating tape and am considering lower power bulbs. Just wondering if anybody has encountered the same problem or can offer any solution other than letting the front tyres down or fitting more weights. The operators manual and WSM do not give anything on adjustment.
UPDATE
have taken the headlights out and one of them apart (difficult & messy job held together with mastic)
the problem has been found which i will try to describe but if i take them apart again i will try to add some photos to clarify:
the headlight is a sealed unit comprising an outer shell, inner unit and a bulb holder.
the inner unit is suspended within the outer shell by means of the two adjustment screws and a third rod with a ball and socket joint on the end. if you think camera tripod where the tripod can be levelled by adjusting two of the legs without need to adjust the third then you're on the right track. the third "leg" of the kubota headlight is a steel rod with a ball end into a plastic socket on the headlight inner.
as the two adjustment screws are turned the ball and socket joint should only allow rotation and is intended to restrain the headlight inner in all other directions (XYZ) of movement. the problem arises when the ball and socket joint is in tension and the plastic socket flexes and pops apart. once this has happened the lights point skyward and will not adjust down again.
if anyone reading encounters this problem there is a possible workaround: if the whole headlight unit is removed from the tractor and the bulb holder removed it is possible to see the ball and socket joint looking in through the bulbholder aperture. i managed to reconnect it by turning the adjustment screws to compress the joint back together. i adjusted the light unit to it lowest possible position before the ball joint pops apart and put it back in the tractor whilst avoiding the temptation to tweak it in situ.
if i take it apart again i will attempt to get a metal collar around the plastic socket joint: maybe a single ear "o clip" if i can get one in there would work.