737 AMM 飞机维护手册 WATER AND WASTE(10)

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C. Turn off water heater switch.
D. Disconnect electrical plug on compartment wall. (See figure 401.)
E. Close lavatory 3-way drain valve.
F. Disconnect inlet and outlet tubing. Install protective cover on inlet and outlet tubing.
NOTE: A container will be necessary to catch any water when disconnecting water lines.
G. Disconnect mounting clamp and remove heater.
2. Install Water Heater
A. Place heater in position and connect mounting clamp. (See figure 401.)
B. Connect inlet and outlet tubing.
C. Connect electrical plug at compartment wall.
D. Open lavatory 3-way drain valve and check for leaks.
E. Close circuit breaker and check that water heater switch is in ON position.
CAUTION:  DO NOT APPLY POWER TO HEATER UNTIL HEATER IS COMPLETELY FILLED WITH WATER.
F. Close sink cabinet disposal compartment door.
May 15/67 38-11-61 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

F90447
Water Heater Installation  510 
38-11-61Page 402   Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 15/73 

WASHBASIN - MAINTENANCE PRACTICES
1.  General There are three types of water faucets used on 737 airplanes:
A.  Turn-to-flow
B.  Press-to-flow (ALL EXCEPT SABRE P/N 600380-2) self venting with individual internal components.
C.  Press-to-flow (SABRE P/N 600380-2) self venting with internal components integrated into a
cartridge. All three types of faucets consist of a manifold, hot and cold self closing valves, a water spout, and possibly a drain plunger.
2.  Repair - Leaking Faucets
A.  Turn-to-Flow Type (Fig. 201).
(1)  
Equipment and Materials

(a)  Crane wrench - No. F10834

(2)  
Remove Leaking Valve Cartridge.

(a)  
Determine if hot or cold valve is leaking (feel faucet assembly and dripping water for temperature).

(b)  
Close manual shut-off valve in water supply line or drain water system as applicable.

(c)  
Remove valve handle.

(d)  
Back up locknut against cap and unscrew valve cartridge from body of faucet.

 

(3)  
Install Replacement Valve Cartridge.

(a)  
Screw valve cartridge into body of faucet until metal-to-metal contact is made.

(b)  
Tighten locknut until metal-to-metal contact is made.

(c)  
Install valve handle.

(d)  
Open manual shut off valve or fill water system as applicable.

 

B.  Press-To-Flow Type (ALL EXCEPT SABRE P/N 600380-2) (Fig. 202).
(1)  
Determine if hot or cold valve is leaking (feel faucet assembly and dripping water for temperature).

(2)  
Disassemble leaking valve as follows.

(a)  
Close applicable manual shutoff valve in water supply line.

(b)  
Using a small diameter blunt instrument, press ends of hinge pins toward each other, until ends clear holes in faucet handle.

(c)  
Remove handle, hinge pins, and spring.

NOTE:  Do not allow spring force to eject hinge pins from position when removing handle.

(d)  
Remove retaining nut then remove hinge block.

(e)  
Using a spanner wrench, remove plunger assembly.

(f)  
Remove plunger spring then remove plunger housing.

(g)  
Remove and discard plunger housing O-ring.

(h)  
Remove float assembly and discard O-ring. If float assembly is retaining water, discard float assembly.

 

532 
Jan 20/83  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  38-11-81 Page 201 

F90533
 Press-to-Flow Valve Assembly

 532 38-11-81 Figure 202 Jan 20/83 Page 202
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(i)  Examine removed parts carefully. Check for wear, cracks in plastic parts, and swelling of diaphragm. Replace all defective parts.
NOTE:  If diaphragm requires replacement, ensure that countersink in spacer is placed toward diaphragm on reassembly of plunger assembly.
(3)  Reassemble valve as follows.
(a)  
Assemble O-ring on float (if not already installed) and install float assembly into faucet body.

(b)  
Assemble O-ring on plunger housing and install plunger housing.

(c)  
Install plunger spring.

(d)  
Install plunger assembly and tighten with spanner wrench. Exert care not to strip plunger nut threads.

CAUTION:  DO NOT STRIP PLUNGER NUT THREADS WHEN INSTALLING PLUNGER ASSEMBLY.
　
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