I got terrific help here last time I asked an RD question, so let's see if you can sort this one...
This is NOT about the upper and lower (Philips Hi and Lo) set screws on the rear of the RD body. Nor the "B" tension screw.
It concerns a slotted screw INSIDE the parallelogram. 1992 Deore Lx.
Later Deores do not have it.
Between the parallelogram arms is a tension spring adjusted by a flush-fitting flat-headed screw about 1/4" across. The screw is on the inner (wheel side) arm. The stem of the screw seems to be cam-shaped. It rotates 360 degrees, held in place by a circlip, and has 4 default positions (12 o'clock, 3, 6 and 9 o'clock) to tension the parallelogram spring. The parallelogram arm has a small punch mark, and the screw has a tiny arrowhead, as alignment guides.
I've tried adjusting it to each of the positions it "likes to rest in", (12 o'clock, 3, 6 and 9 o'clock) with no noticeable difference in the feel of the tension at the thumb lever.
I suspect that is why Shimano abandoned it on later Deore RDs.
But it is possible I'm missing something, so if anybody knows how to set this screw properly, please advise. I'm basically asking, how do I set it to the LEAST tension?
My RD works well, but on a recent ten-day tour my right thumb joint was very painful from the effort of changing up the cassette.
Btw. The outer cable is clean, kink free, and well oiled.
This is NOT about the upper and lower (Philips Hi and Lo) set screws on the rear of the RD body. Nor the "B" tension screw.
It concerns a slotted screw INSIDE the parallelogram. 1992 Deore Lx.
Later Deores do not have it.
Between the parallelogram arms is a tension spring adjusted by a flush-fitting flat-headed screw about 1/4" across. The screw is on the inner (wheel side) arm. The stem of the screw seems to be cam-shaped. It rotates 360 degrees, held in place by a circlip, and has 4 default positions (12 o'clock, 3, 6 and 9 o'clock) to tension the parallelogram spring. The parallelogram arm has a small punch mark, and the screw has a tiny arrowhead, as alignment guides.
I've tried adjusting it to each of the positions it "likes to rest in", (12 o'clock, 3, 6 and 9 o'clock) with no noticeable difference in the feel of the tension at the thumb lever.
I suspect that is why Shimano abandoned it on later Deore RDs.
But it is possible I'm missing something, so if anybody knows how to set this screw properly, please advise. I'm basically asking, how do I set it to the LEAST tension?
My RD works well, but on a recent ten-day tour my right thumb joint was very painful from the effort of changing up the cassette.
Btw. The outer cable is clean, kink free, and well oiled.