Table 7-2.—Common Troubles, Causes, and Remedies on Shipboard Laundry Dryers-Continued TROUBLE CAUSE REMEDY Dryer  runs, Inadequate venting Proper operation of steam dryers depends on air flow through the coils. steam passing Inadequate  makeup     Venting must be done with the least possible restriction. Make up air through coil,      air                             opening of at least 350 sq. inches free area must be available in the dryer doesn’t Lint trap blocked vicinity of the dryer to replace the air being exhausted out by the dryer. heat. Lint traps must be kept clean. Coil fins clogged Coil fins must be kept clean. with  lint Steam supply & Must be properly installed and adequately sized. See piping installation return sheet. 8-stage heat control Check for loose dampers. Adjust dampers and tighten set screw in contol handle. Tumbler  Noisy  Not  level Check manual for proper leveling procedure. or  Vibrating Fan out of balance Accidental damage to the fan blade can change the dynamic balance. Damaged fans should be replaced. Basket rubbing V-Belt  sheaves Belt Foreign objects Adjust basket clearances. Tighten set screws. Make sure sheaves are in proper alignment. Adjust  belt  tension. Occasionally screws, nails, etc. will hang in the basket perforations and drag against the sweep sheets surrounding the basket. Such foreign objects should be removed immediately. You should lubricate all bearings, the dashpot, and of  the  machine.  Trained  personnel  can  avoid  troubles the   air   cylinder   regularly   as   specified   by   the manufacturer’s  manual  or  by  the  applicable  MRCs. Advise  the  division  responsible  for  the  equipment  to submit  requests  for  repairs  and  parts  replacements  on Ship’s  Maintenance  Action  Form,  OPNAV  4790/2K. This procedure will help you, as the maintenanceman, track  the  parts  that  are  failing  and  provide  you  with documented  repairs.    The  maintenance  of  all  laundry presses should be according to the applicable MRCs. MESS  DECK  EQUIPMENT Common mess deck equipment on most Navy ships is either used for chilling or warming foods.  For  chilling foods, there are salad bar tables, beverage dispensers, and   milk   dispensers.     Some  of  the  troubles  that  a maintenanceman may encounter on this equipment are too much frost buildup, not getting cold, or not working at  all.  Some  problems  can  easily  be  corrected  or prevented by training the operator on the proper usage by  correctly  loading  refrigerators,  properly  securing  the dispenser  door,  and  using  proper  defrosting  techniques. Improper defrosting, such as the use of a pointed object to scale out thick frost buildup, often results in pin holes on the cooling coil and loss of refrigerant charge.  If you train  and  encourage  mess  deck  operators  to  practice proper  equipment  use  and  maintenance,  your  job  and theirs  will  be  easier. For   warming   foods,   there   are   electric   and steam-operated   food   warmers.   Troubles   with steam-operated  warmers  are  normally  either  not  getting enough steam pressure or not getting any steam at all. You  as  a  maintenanceman  can  troubleshoot  this  by inspecting the steam line and checking it for leakage or restrictions  such  as  water  in  the  steam  line.  Restrictions can be detected by a hammering noise in the line. When bleeding a steam line, be sure you are well protected by wearing a face shield and thick gloves. To release any water trapped inside the steam line, you should slowly 7-5