TM 55-1930-209-14&P-19 Table 2-4.  Preventive Maintenance Checks and Services for Handling Equipment (Continued) 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 g.    Inspect the loose end link, loose end End link is loose screw, and dead end block on double or open. reeved units.  Replace the loose end link if it has opened, and check the operation of lower limit switch. h.    Check that the loose end screw is tight and the pin seated at the dead end of chain. i. Inspect the upper suspension adapter Capscrews are making sure it is fully seated in the loose. recess and that both cap screws are tight.  If screws continue to be loose, replace the self-locking nuts in hoist frame. j. On single phase units (without a contac- Switching arm tor) and two speed units, check opera- does not pivot tion of the control station switching arm freely and/or that it pivots freely and does not stick in sticks in either either position. position. k.    Inspect electric brake friction linings and Gap exceeds friction surfaces for wear, scoring, or 0.045 in. warping.  Check air gap between arma- ture and field.  Adjust if the gap exceeds 0.045 in. I. Inspect the liftwheel pockets for wear. Liftwheel is Severely worn liftwheel should be severely damaged. replaced. m.  Inspect the chain guides for wear or bur- Chain guides ring where chain enters hoist.  Severely severely worn. worn guides should be replaced. n.    Inspect trolley trackwheels for external Excessive wear on wear on the tread and flange, and for tread and flange.  Inter- wear on internal bearing surfaces as evi- nal bearing exhibits denced by a looseness on the stud. looseness on stud. o.    Inspect collector wheels or collector Collector wheels, shoes and cotter pins for wear.  Check shoes and other the wheels and studs for corrosion and pins are worn. free turning.  Badly worn parts should be replaced. 13-10