You must read the manufacturers instruction book for each machine and become familiar with all its operating characteristics and its basic design. If routinely cleaned, descaled, and properly maintained, scullery machines will not have any problems. But these procedures must be done on time as specified by the planned maintenance schedule or by the manufacturers manual. Any necessary repairs and parts replacement requests must be submitted by the responsible division on Ships Maintenance Action Form, OPNAV 4790/2K. Following this procedure and using this form will provide you, as the maintenance person, a document of repairs and parts that failed.

TROUBLESHOOTING

From time to time, you may be called upon to repair scullery machines that have become defective. Figures 7-5 and 7-6 illustrate the types of scullery machines used by the Navy. Some common difficulties, the usual reasons for their occurrence, and possible remedies for those difficulties are listed in table 7-4.

REPAIRS OR OVERHAULS

Scullery machines must be inspected by the maintenance personnel according to the PMS schedule. Listed here are some common inspections, maintenance, repairs, or overhauls you may encounter with these machines. You should perform the following:

1. Check the adjustment of tension on the conveyor chains if the machine is equipped with a conveyor. If the chain is equipped with lugs, make sure the lugs on both chains are directly opposite each other.

2. See that the guide sprockets are properly located on their shaft so that the conveyor chain will ride properly on the track assembly.

3. Inspect the operation of the doors and make sure all the counterweights are properly attached and the doors are held in the open position when raised.

4. Check the operation of thermometers, pressure gauges, thermostats, and automatic mixing valves or boosters.

5. Adjust the thermostat so that the machine will not start up unless the desired temperature is reached.

6. Inspect the pump packing and adjust as necessary to stop leakage around the pump shaft.

Figure 7-6.Cutaway view of a double-tank automatic dishwasher.

7. Lubricate the motor and pump bearings.

8. Lubricate, as necessary, the gear reducer unit.

9. Lubricate the conveyor shaft bearings, drive mechanisms, sprocket chains, and so on.

10. Replace any missing lubrication fittings.

11. Inspect all steam and water valves.

12. Disassemble and inspect pumps internally for

undue erosion or corrosion at least annually.

SUMMARY

This chapter has presented some general information on maintenance and repairs of laundry, mess deck, galley, and scullery equipment. Maintenance personnel should make use of the manufacturers technical manual, the PMS, and other related NSTMs, which are furnished to all Navy ships.

Table 7-4.Troubleshooting Chart for Scullery Machines