Rusty, I think you will find by removing the parts there is build up and wear underneath. I see a lot of corrosion that should be cleaned off the screw and spring. WD 40 will take care of the cleaning with a wire brush. If there are any burrs you may need to sand or file them off. The block should slide freely with out the spring (Which is most likely dead.) You can buy a replacement spring from either Rockler or Woodcraft that will do wonders for your adjustment tension. Last and very important is to look for any type of grease fitting. Some are Zerk fittings like you would see on a car and others are simply a hole you must use a needle adaptor to pump the bearing grease into. A very light coating on the blocks friction surfaces will help, but it will also attract dirt and sawdust. All the parts should move freely without spring tension.
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Mike |