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 TM 55-1905-220-14-8
4-16. WATER CLOSET - MAINTENANCE INSTRUCTIONS (Continued).
the two normally closed switches mounted on the gravity timer (27). The purpose of this check valve is to
ensure control vacuum to these switches which in turn distributes vacuum for water dispensing and discharge
opening.
(6) In addition, for improved reliability, a memory has been installed in the water closet circuit. Should
system vacuum pressure be below proper flushing range, this water closet will not flush. Instead, after
pushbutton (43) is activated, water closet will remain in a semi-cocked position until vacuum level rises to
adequate pressure for proper flushing action. At this time water closet will automatically initiate and complete
flushing action as described above.
b. Refer to the following for maintenance instructions.
DESCRIPTION
PARAGRAPH
Water Closet
Water Closet Timer
4-616
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