H. Position end closure in tank opening with spherical surface inside tank. Install retaining ring to the point where the red marking in bottom of groove for retaining ring cannot be seen.
CAUTION: WHEN INSTALLING END CLOSURE, USE A SOFT NON-METALLIC MALLET TO TAP END CLOSURE AND RETAINING RING IN PLACE. A METALLIC INSTRUMENT MAY RESULT IN DAMAGE TO TANK, END CLOSURE OR RETAINING RING.
I. Install water tank, but do not fill or check for leaks (Ref 38-11-11).
(1) If water tank had not been removed from its position, restore to normal as follows:
(a)
Lift tank slightly and carefully rotate 90 degrees until transmitter points upward and tank attachment holes align with holes on brackets and struts.
CAUTION: WHILE ROTATING TANK AVOID CONTACT WITH OTHER METAL PARTS TO PREVENT SCORING OF EITHER, AND ALSO TO PREVENT DAMAGE TO TRANSMITTER OR DRAIN VALVE.
(b)
Connect all connections to water tank (Ref 38-11-11).
J. Check that step 3.H. has been accomplished.
K. Install quantity transmitter electrical connector.
L. If necessary, provide electrical power.
M. Close WATER QTY IND circuit breaker on panel P18.
N. Check that water quantity indicator shows zero.
O. Fill water tank (Ref 12-14-0).
P. Check that quantity indicator illuminates at F (full) mark.
Q. Pressurize water tank (Ref 38-41-0, MP).
R. Allow 2 minutes for pressure to stabilize.
S. Check water tank connections for leaks.
T. Replace access panels.
U. Remove electrical power if no longer required (Ref 24-22-0, MP).
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38-11-21 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/84
559 Water Quantity Transmitter Installation
Jun 20/89 Figure 401 38-11-21
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
WATER FILL AND OVERFLOW VALVE - REMOVAL/INSTALLATION
1. Prepare for Removal
A. Drain water tank by opening drain valve and fill and overflow valve.
B. Depressurize water tank. Refer to 38-41-0, Water Tank Pressurization System - Maintenance Practices.
C. Close drain valve and fill and overflow valve.
D. Remove aft cargo compartment rear bulkhead access panel (Fig. 401).
2. Remove Fill and Overflow Valve
A. Disconnect and cap four fill and overflow hoses from valve.
B. Disconnect shaft from valve by removing shaft connecting pin and two washers.
C. Remove inboard and outboard stop nuts.
D. Remove inboard mounting bracket mounting bolts and washers.
E. Remove inboard mounting bracket and valve.
3. Install Fill and Overflow Valve
A. Position fill and overflow valve in outboard mounting bracket and place inboard bracket in mounting position (Fig. 401).
NOTE: Check that valve is closed. Valve is closed when adapter tab is perpendicular to airplane centerline.
500
Jul 15/70 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 38-11-31 Page 401
F90495
Water Fill and Overflow Valve Installation 501
38-11-31Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/75
B. Install two inboard bracket mounting bolts.
C. Install inboard and outboard stop nuts.
D. Connect four fill and overflow hoses to valve.
E. Connect shaft to valve with shaft connecting pin and washers.
NOTE: Check that shaft handle on panel is in closed position.
F. Fill water tank. Refer to Water System - Servicing, Chapter 12.
G. While filling check all valve connections for leaks.
H. Replace access panel.
I. Remove placards from switches.
500
Aug 15/69 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 38-11-31 Page 403
FORWARD LAVATORY SECONDARY DRAIN VALVE - REMOVAL/INSTALLATION
EFFECTIVITY
Airplanes with Forward Lavatories and Secondary Drain Valves
1. Remove Secondary Drain Valve (Fig. 1)
A. OPEN circuit breakers on P18:
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