MIL-HDBK-740 Dishwashing OperationsThis handbook contains information concerning the equipment, supplies, and procedures for the cleaning of tableware in single-tank and multiple-tank dishwashing machines, hand washing in kitchens and hand washing in the field.

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MIL-HDBK-740

(1) The divided into two systems,

(a)

components of the preflushing machine may be a scrapping system and a flushing system.

The components of the scrapping system normally

consist of a scrapping plate (Item #2, Figure 11), a scrap basket (Item #7,

Figure 11) and a tank (Item #9, Figure 11).  Food scraps from tableware and serving trays are scrapped onto the scrapping plate where they fall into the scrap basket and are trapped.  The tank supports the scrapping plate and scrap basket and also acts as a reservoir for the flush water.  The tank, scrapping plate, and scrap basket are of stainless steel.  The top of the tank is provided with a mounting flange that is secured to the underside of the dish table.

(b) The components of the flushing system consist of

an electric motor (Item #17, Figure 11) which drives a rotary pump (Item #16,

Figure 11) by means of pulleys and belt.  The pump impeller (Item #14, Figure 11) drains water from the tank into the pump intake plate (Item #13, Figure 11) and forces it through the gusher tube (Item #19, Figure 11). The height of the water column above the gusher tube is adjustable (see para. lb(2) ).

b.  Controls

(1) P ump

motor switch.- The pump motor switch (Item #18,

Figure 11) turns the motor on.

(2) P ump

intake plate.- The pump intake plate (Item #13,

Figure 11) controls the height of the water column from the gusher tube.

When properly adjusted, the water column should fall into the center of the

scrapping plate, if the machine is equipped with a scrapping plate. To adjust the pump intake plate, proceed as follows:

(a) Turn the pump intake plate clockwise to increase height of water column; turn plate counterclockwise to decrease height of water column.

(b) When the nearest full turn has been made (pump intake plate opening must be in down position), lock intake plate in position with locking dog (Item #12, Figure 11).

(3) Water valves.- Valves placed in the hot and cold water lines that are connected to the blender are usually gate valves.

c.  Operation.- If the machine has a scrapping plate, follow operating procedures given below.  If machine does not have a scrapping plate, follow all applicable procedures.

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