B/E AEROSPACE
COMPONENT MAINTENANCE MANUAL
4521
Page 3003
11 Jul 2018
25-34-80
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(b)
Remove lock nut (320), flat washer (325), screw (315), and lockdown arm pivot (330) that
attach the lock down arm (310) to the water boiler chassis (525).
(c)
Remove external retaining ring (300) and pivot pin (305).
(d)
Remove rail lock block (285) and lock down pin (295) from the lock down arm (310).
(e)
Remove screw (365), lock washer (370), and latch bushing (375) from lock down
arm (310).
(f)
Pull out lock down arm (310) with lock down latch (360) and screw (380) through the front
panel (390).
(6)
Disassemble the tank assembly as follows:
NOTE:
The steps below are for the tank assembly in IPL Figure 3. The steps are similar for
other effectivities in IPL Figure 3.
CAUTION:
WHEN HEATING SOLDER (refer to Table 3001), TURN TANK SO HOT SOLDER
FALLS AWAY FROM THE TANK AND THERMAL SWITCHES TO PREVENT
SPLATTER ON COMPONENTS.
(a)
Heat solder (refer to Table 3001) and remove one buss wire (5, IPL Figure 3) and RTD
assembly wire from thermal switch (10) terminals.
CAUTION:
CAREFULLY REMOVE HEATER ASSEMBLY WIRE TERMINAL FROM
TERMINAL OF THE OVER TEMPERATURE THERMAL SWITCHE SO THE
TERMINAL DOES NOT MOVE ON THE PLASTIC HOUSING OF THE
THERMAL SWITCHE. TERMINAL MOVEMENT CAN CRACK THE
THERMAL SWITCH HOUSING AND RESULT IN FAILURE OF THE
THERMAL SWITCH.
(b)
Remove three quick-connect wiring terminals of heater assemblies (90) from the terminals
of thermal switches (10) on the weldment tank (100). Cut and discard the wraps from wires.
(c)
Remove grommet (560, IPL Figure 2) from water boiler chassis (525).
(d)
Remove six nuts (15) and three thermal switches (10) from the weldment tank (100).
(e)
Remove the RTD assembly (80) from the weldment tank (100).
NOTE:
If necessary, document heater assembly serial number.
(f)
Remove the barbed fitting (70) and tubing (255, IPL Figure 2) from the vent valve
assembly (30).
(g)
Remove the connector fitting (20) from the pressure relief valve (25).
(h)
Remove the pressure relief valve (25) from the weldment tank (100).
(j)
Remove the vent valve assembly (30) from the weldment tank (100).
(k)
Cut and discard tie wraps from harness assembly (95, IPL Figure 2) and unplug cable from
switch (410, IPL Figure 2). Remove harness assembly (95, IPL Figure 2).
