Shopsmith Forums

The quadrant gear has some wear, but is far from being unservicable. If it has some high spots(causing binding) they should be filed down. The shaft should turn easily over the whole motion range. Secret at this point is to prevent future damage.

The knob has problems. The gear teeth are badly sheared off. There is a guy on e-bay that repairs these with a steel toothed gear. An improvement for sure and he is cheaper than a new one from SS.

http://www.ebay.com/itm/SHOPSMITH-MARK-V-SPEED-CONTROL-KNOB-REPAIR-/321168698635?pt=Power_Tools&hash=item4ac7256d0b

Your adding the nut is good, but it requires rear access to remove the control in the future.

I do hope the excellent 'normal' pix from Joshh help your understanding.

Now back to getting the sheaves 'unstuck'.;) The 'falling' control sheave is normal as long as it can be easily closed(all the way) by manually pushing it up.

I assume I should put SAE 30 on the shaft of the fallen sheeve? Also, Do I put any oil or grease on the quadrant gear.

csanders wrote:I assume I should put SAE 30 on the shaft of the fallen sheeve? Also, Do I put any oil or grease on the quadrant gear.

No SAE 10! Sewing machine oil/Turbine oil/Electric motor oil/3 in 1 oil/but the best is "Zoom spout oil" for its long delivery tube.

Opinions vary re lubricating the quadrant gear. I prefer graphite powder. The problem with grease or oil is sawdust sticks to it and becomes crud like what stuck the sheaves. If you do use grease or oil, do so very sparingly. Anything is better than none.

I would put one drop of #10 oil on the speed control shaft at the bushing and work in in thoroughly.

I am calling it a day! Good Night!