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A
747-400
MAINTENANCE MANUAL
LATCH
ACCESS PANEL
SHUTOFF VALVE SEE A
SCREW, WASHER
HOSE
BRACKET
INLET
PIPE
OUTLET NUT
PIPE LOCKNUT
SHUTOFF
VALVE
ELBOW
A
Lavatory Shutoff Valve Installation
Figure 401
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C25554
A
747-400 MAINTENANCE MANUAL
S 024-027
(4)
Disconnect the elbow from the tee fitting at the bottom of the hot water heater.
S 024-019
(5)
Disconnect the water pipes from the inlet and outlet sides of the shutoff valve.
S 024-007
(6)
Remove the locknut that installs the shutoff valve in the bracket.
S 024-009
(7)
Remove the shutoff valve.
TASK 38-11-65-404-010
3. Lavatory Water Shutoff Valve Installation (Fig. 401)_________________________________________
A. General
(1) The water shutoff valve for the lavatory will be referred to as the shutoff valve in this procedure.
B. References
(1)
AMM 12-14-61/301, Water System Servicing
(2)
AMM 38-15-60/201, Water System Pressurization
C. Access
(1) Location Zone 224 Upper Deck Crew Rest Body Sta 385 to 632, Right
D. Procedure
S 424-011
(1)
Put the shutoff valve in its installed position.
S 714-012
(2)
Make sure that the handle can be freely turned from full open to the full closed position.
(3)
Install the shutoff valve in the bracket and tighten the locknut.
(4)
Connect the water pipes to the shutoff valve.
S 424-013
(5)
Connect the elbow to the tee fitting at the bottom of the hot water heater.
(6)
Make sure that the shutoff valve is closed.
(7)
Do this task: "Water System Pressurization" (AMM 38-15-60/201).
S 424-014
S 424-012
S 864-016
S 614-024
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747-400 MAINTENANCE MANUAL
(8) S 864-025Make sure the water tanks are not empty.
(9) S 614-026If it is necessary, add water to the water tanks (AMM 12-14-61/301).
S 864-018
(10)
Open the shutoff valve. S 154-019
(11)
Open the cold water faucet above the shutoff valve. S 874-020
(12)
Let the water run until it runs in a steady stream. S 864-021
(13)
Close the faucet. S 794-022
(14)
Do a check of the shutoff valve connections for leaks. S 414-023
(15)
Install the access panel.
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747-400 MAINTENANCE MANUAL
LAVATORY BASIN FAUCET - MAINTENANCE PRACTICES
_____________________________________________
1. General_______
A. This procedure gives the instructions for these tasks:
(1)
The removal and installation of the lavatory basin faucets.
(2)
The removal and installation of the cartridges for the lavatory basin faucets.
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