Jet J-7040 Operating Instructions And Parts Manual

Also see for J-7020: Operating instructions and parts manual

15Adjusting the Blade GuidesThe cut-off saw has adjustable blade guide supports(see figure 17). The blade guide supports allow you toset the blade guides for varying widths of workpieces.To make accurate cuts and prolong blade life, theblade guide supports should be set to just clear theworkpiece to be cut.Figure 17: Blade guide supports1. Loosen the knob on the blade guide support andslide the guide left or right as required. Repeat forthe other blade guide.2. Set the blade guide supports as required to accom-modate the width/diameter of the workpiece. Theblade guides should be positioned so the guides donot contact the workpiece as the saw head movesdownward through the workpiece.Replacement of CarbideBlade GuideRefer to Figure 18.1. Remove the cap screw and remove the carbide guide.Discard the carbide guide.2. Install the replacement carbide guide on the guidebearing support. Install the cap screw. Set the guideso it just contacts the side of the saw blade.3. Using a machinist's square, check squareness ofthe blade to the table.used to adjust the amount of down force the saw headputs on the workpiece when the feed rate control valveis fully open.1. Raise the saw arm to its full upright position andlock it in position.2. To adjust the tension on the spring, loosen the twonuts on the threaded rod of the spring pivot post.Adjust the tension as required.3. Tighten the two nuts against the pivot post.4. The saw can now be returned to service.Replacing the Drive Wheel1. Remove the blade (see Changing Blades).2. Remove the screw, spring washer, and washer fromthe speed reducer shaft.3. Pull the wheel from the speed reducer shaft. Re-move the drive key from the speed reducer shaft.4. Inspection: Examine drive edge and shoulder ofthe wheel for damage. Replace the wheel if dam-aged.5. Install the key in the keyway in the speed reducershaft. Align the keyway in the wheel with the key inthe speed reducer shaft. Reinstall the wheel on thespeed reducer shaft.6. Install the screw, spring washer and washer in theend of the speed reducer shaft.7. Install the blade (see Changing Blades).Replacing Idler Wheel orIdler Bearing1. Remove the saw blade (see Changing Blades).2. Remove the screw, spring washer, and washer fromthe idler shaft.3. Remove the idler wheel. Remove the bearing fromthe idler wheel.4. Inspection: Examine the drive edge and shoulderof the idler wheel for damage. Replace the wheel ifdamaged.5. Inspect bearings for damage and smooth operation,Replace if faulty.6. Install the bearing in the idler wheel. Install the idlerwheel on the idler shaft.7. Install the screw, spring washer and washer in theidler shaft.8. Install the blade (see Changing blades).Blade GuideSupportsFigure 18: Carbide blade guides and guide bearingsConcentric BushingEccentricBushingBlade Guide BearingsCap Screw(Typical)CarbideGuides (2)Cap Screw(Typical)