Table 7-2.Common Troubles, Causes, and Remedies on Shipboard Laundry Dryers-Continued
Proper operation of steam dryers depends on air flow through the coils.
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
Lint trap blocked
vicinity of the dryer to replace the air being exhausted out by the dryer.
Lint traps must be kept clean.
Coil fins clogged
Coil fins must be kept clean.
Steam supply &
Must be properly installed and adequately sized. See piping installation
8-stage heat control
Check for loose dampers. Adjust dampers and tighten set screw in contol
Tumbler Noisy Not level
Check manual for proper leveling procedure.
Fan out of balance
Accidental damage to the fan blade can change the dynamic balance.
Damaged fans should be replaced.
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
manufacturers manual or by the applicable MRCs.
Advise the division responsible for the equipment to
submit requests for repairs and parts replacements on
Ships 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