WATER CLOSET - MAINTENANCE INSTRUCTIONS

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SEWAGE SYSTEM - MAINTENANCE INSTRUCTIONS (Continued).

TM-55-1905-220-14-8 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

Theory of operation

TM 55-1905-220-14-8

4-16. WATER CLOSET - MAINTENANCE INSTRUCTIONS.

NOTE

The numbers in parenthesis refer to components on the vacuum schematic and

overall assembly drawings.

a. Theory of operation. The vacuum flush type Water Closet Assembly contains a combination

vacuum-mechanical circuit to actuate, sequence and time out the flush cycle. Main components of the vacuum

circuit are: vacuum dispensing valve (34), activating valve (43), gravity timer (27), water dispensing valve (38),

and sewage discharge valve (49). A vacu-mechanical circuit diagram is also shown.

VACUUM CIRCUITS SHOWING IDENTIFICATION NUMBERS

4-612