B/E AEROSPACE
COMPONENT MAINTENANCE MANUAL
4521
Page 3002
26 May 2015
25-34-80
Use or disclosure of information on this page is subject to
the restrictions in the proprietary notice of this document.
(a)
Remove screw (60), lock washer (65), and flat washer (70) that attach the module
door (55) to the molded module housing (130). Remove the module door (55).
CAUTION:
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) PARTS. USE ESDS
PROCEDURES AND WORK ARE TO AVOID DAMAGE.
(b)
Unplug harness assembly (95) and all other wiring connectors from the sockets in the
hybrid PC board assembly (100).
(c)
Remove four screws (105), four lock washers (110), and four washers (115) that attach the
hybrid PC board assembly (100) to the module cover (75). Remove the hybrid PC board
assembly (100).
(d)
Remove four screws (125) that attach the rear support assembly (120) to the water boiler
chassis (525).
(e)
Remove two screws (135), two lock washers (140), and two flat washers (145) that attach
the rear support assembly (120) to the molded module housing (130).
(f)
Remove the water plug (200) and O-ring (205) that attach the drain valve body (195) to the
rear support assembly (120).
(g)
Cut and discard wire tie wrap. Remove heater wire and grommet (250) from molded
module housing (130).
(h)
Remove two screws (175), four washers (180), two washers (185), and two nuts (190) that
attach the connector harness assembly (150) grounding wires to the water boiler
chassis (525).
(j)
Move the rear support assembly (120) down to permit the molded module housing (130) to
disengage from the water boiler chassis (525). Remove the module housing (130).
Remove the rear support assembly (120) from the water boiler chassis (525).
(k)
Remove and discard o-ring (160) from the connector harness assembly (150) and remove
connector harness assembly (150) from the rear support assembly (120).
(l)
Remove drain funnel (265) from the water boiler chassis (525).
NOTE:
The drain funnel (265) design has been improved. Replace as necessary per
3530-0337-SIL-001.
(m)
Unscrew drain valve stem (210), O-ring (215), O-ring (220) from the drain valve
body (195).
(n)
Loosen nut (240) from the drain valve body (195). Remove tubing (225) from tank
assembly (545).
(p)
Remove two screws (275) and nuts (280) that attach drain tube assembly (270) to the
water boiler chassis (525).
(5)
Remove the rail lock block (285) from the water boiler chassis (525) as follows:
(a)
Remove two screws (290) that attach rail lock block (285) to the water boiler chassis (525).
