TM 55-1930-209-14&P-19 Table 2-4.  Preventive Maintenance Checks and Services for Miscellaneous Equipment (Cont) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY f. Make sure that all chucks, adjusting keys, or wrenches are removed from drills, grinders, or other power tools before turning these tools ON. g.    Make sure that the item being drilled, ground, pressed, or welded is being held securely in place. h.    Check that indicator lights are operating properly.  Replace bulbs as necessary. i. With welder started, but before welding, rotate current control through its entire range to lessen the possibility of contact freezing. j. Check that arc welder electrode and work connections are tight.  Tighten as necessary. WARNING Grinding  wheels  can  explode  if  they have   received   minor   cracks   when shipped or during replacement. When  starting  a  grinder  for  the  first time or after installing a replacement wheel,   the   operator   must   stand   to one  side  of  the  grinder  for  1  minute after turning it ON. k.    Check grinder wheel for wear.  Replace Grinder wheel is after diameter is reduced to 2 inches reduced to 2 inches below original size. below normal size. I. Check safety guard and vacuum bag for Safety guard proper operation.  Repair or replace as missing or inoper- necessary. able. m.  Remove rust or corrosion.  Touch up paint in accordance with TB 43-0144. 3 Accesses System a.    Visually check accesses for damage or defects which could impair effectiveness and operability of doors, hatches, or port- holes, etc.  Repair as necessary. b.    Remove rust and corrosion.  Touch up paint in accordance with TB 43-0144 as necessary.  DO NOT paint threads or labels. 15-9