S 014-035
(3)
Remove the small closure plate on shroud wall.
E. AIRPLANES WITH NO CUTOUT ABOVE TOILET SHROUD; Gain Access to Motor-Pump-Filter Assembly
S 014-005
(1)
Open the latches at the bottom of the toilet shroud.
S 014-006
(2)
Remove the toilet shroud.
S 014-029
(3)
To get access to the aft side of the lavatory wall, do these steps:
(a)
Remove the closure strip for the ceiling panel aft of the partition.
(b)
Remove the ceiling panel adjacent to the partition.
(c)
Remove the cover assembly in the forward corner at the partition.
(d)
Remove the dado panel adjacent to the partition.
(e)
Remove the gap cover for the sidewall panel adjacent to the partition.
(f)
Remove the sidewall panel adjacent to the partition.
(g)
Remove the screws for the floor mounts.
(h)
Retract the pins in the pin mounts.
(i)
Move the partition aft and inboard to remove the partition.
F. Motor-Pump-Filter Removal
S 034-007
(1)
Disconnect the electrical connector for the MPF assembly at the toilet flush timer.
(2)
Disconnect the hose from the tank inlet tube.
S 034-008
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 034-009
(3)
Remove the bonding jumper from the MPF assembly.
S 034-010
(4)
Remove the nuts and washers that hold the MPF assembly to the toilet tank.
S 034-011
(5)
Remove and discard the grommets.
S 024-012
(6)
Lift the MPF assembly out of the toilet tank.
TASK 38-32-62-404-013
3. Motor-Pump-Filter Assembly Installation (Fig. 401)
_______________________________________
A. References
(1)
AMM 12-17-61/301, Toilet Tank - Servicing
(2)
AMM 24-22-00/201, Manual Control
B. Access
(1) Location Zone 224 Upper Deck Crew Rest Body Sta 385 to 632, Right
C. Motor-Pump-Filter Installation
S 424-014
(1) Put the MPF assembly in its position on the toilet tank.
NOTE: Make sure the arrow on the MPF assembly is in line with the
____
arrow on the toilet tank.
S 434-016
(2)
Install new grommets in the mounting plate.
(3)
Install the washers and nuts.
S 434-017
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. FREIGHTERS ú
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ú ú 01 Page 406 ú Jun 18/99
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A
747-400 MAINTENANCE MANUAL
S 144-018
(4)
Make sure the bonding jumper and the surfaces that it connects with are clean.
S 434-019
(5)
Connect the bonding jumper.
S 434-020
(6)
Connect the hose to the tank inlet tube.
S 434-021
(7)
Connect the electrical connector for the MPF assembly to the toilet flush timer.
D. Motor-Pump-Filter Installation Test
S 864-026
(1) Remove the DO-NOT-CLOSE tag and close this circuit breaker on P415 Power Distribution Panel - Right.
(a) 415D35 UPR DK LAV U-21 FLUSH MOTOR
S 864-022
(2)
Supply electrical power (AMM 24-22-00/201).
S 864-027
(3)
Add the chemical precharge to the toilet tank (AMM 12-17-61/301).
S 714-023
(4)
Turn the flush handle and make sure that the toilet flushes correctly.
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