Fig. N.16. Cleaning the Nozzle - TM-55-1930-209-14P-9-4

Fig. N.15. Exploded view of Atomiser. - TM-55-1930-209-14P-9-4_738

Fig. N.17. Atomiser Testing Pump - TM-55-1930-209-14P-9-4_740

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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FUEL SYSTEM - N.11 An atomiser requires attention if (a), when proceeding as above it throws out "solid" wet jets and not broken up spray or, (b), if any of the holes are choked or partially choked so that the spray issues only from one or two holes in the nozzle, or (c), an irregular spray pattern is formed. Atomiser Dismantling The atomiser should be placed on a suitable holding plate, nozzle downwards, first remove the nozzle holder cap nut (1), slacken the locknut (3), release the nozzle spring tension by turning the spring cap (4) in an anti- clockwise direction. Reverse the position of the atomiser on the holding plate and remove the nozzle cap nut (11) and nozzle (10) taking care not to drop the nozzle needle onto the floor. Complete the dismantling by removing the spring cap, spring (6) and spindle (7). Inspect visually for signs of corrosion, distortion, etc. Keep all the dismantled parts together, if possible, in a tray to facilitate re-assembly after cleaning. NOTE: Do not lose the small steel shim washer fitted between the top of the spring and the spring cap. To hold the nozzle holder cap nut in a vice or to use badly worn or adjustable spanners is to invite trouble. Inspection The nozzle needle should be free from all traces of damage, it is important that it is not "blued" at the tip due to overheating. If the nozzle is "blued" or the seating has a dull circumferential ring indicating wear or pitting, the complete unit (nozzle and needle) should be set aside for attention by a depot or agent with specialized equipment available and a replacement nozzle assembly used The stem of the nozzle needle should be clean and bright, free from high spots, bad scratches or dull patches, and the grooves free from foreign matter of any kind; similarly the nozzle needle bore in the nozzle body should be free from any of the above, the small drilled passages should be checked to see that they are clear. Cleaning Starting with the nozzle assembly, remove the needle from the nozzle body and by using the soft brass seat scraper (ET 070) any carbon which may be present on the nozzle body seat can be Fig. N.16. Cleaning the Nozzle.

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