C. Procedure
S 864-013
(1)
Release pressure from the hydraulic reservoirs (Ref 29-09-00/201).
S 864-014
(2)
Open the applicable circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6-3 Circuit Breaker Panel 1) INDICATOR MASTER DIM BUS SEC 5 (system B) 2) INDICATOR MASTER DIM BUS SEC 6 (system A)
S 034-015
(3) Disconnect the supply line quick-disconnect to prevent high leakage of fluid.
NOTE: You can find the quick-disconnect for system A at the
____ reservoir and the quick-disconnect for system B at the EMDP.
S 034-016
(4)
Remove the electrical connector from the overheat switch.
(5)
Remove the overheat switch from the switch tee.
S 024-017
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A 737-300/400/500MAINTENANCE MANUAL
SEE A
SYSTEM A RESERVOIR CASE DRAIN LINE SYSTEM B EMDP SYSTEM B RESERVOIR
FWD SYSTEM A EMDP
SUPPORT
BRACKET
A WASHER
OVERHEAT BULKHEAD NUT
SWITCH
SEE B TO THE HEAT
EXCHANGER AND
THE RESERVOIR
CASE DRAIN
O-RING LINE
OVERHEAT
SWITCH
ELECTRICAL
CONNECTOR
OVERHEAT SWITCH FOR SYSTEM A (SYSTEM B IS OPPOSITE)
B
EMDP Hydraulic Fluid Overheat Switch Installation Figure 401
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A
737-300/400/500MAINTENANCE MANUAL
S 034-018
(6)
Discard the O-ring.
S 434-019
(7)
Install a cover on the open port of the tee fitting.
TASK 29-32-12-404-002
3. Hydraulic Fluid Overheat Warning Switch Installation (Fig. 401)____________________________________________________
A. Consumable Materials
(1)
D00567 Skydrol Assembly Lube - MCS 352
(2)
D00568 Fluid - Hydraulic, BMS 3-11
B. References
(1) 24-22-00/201, Manual Control
C. Access
(1) Location Zone
216 Main Wheel Well, LH
217 Main Wheel Well, RH
D. Procedure
S 644-003
(1)
Apply assembly lube or hydraulic fluid to the O-rings and the fittings threads.
S 424-004
(2)
Install the O-ring and the overheat switch in the open port of the tee fitting.
(3)
Install a lockwire.
(4)
Connect the electrical connector to the overheat switch.
S 434-005
S 434-006
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A
737-300/400/500MAINTENANCE MANUAL
S 864-007
(5) Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers:
(a) P6-3 Circuit Breaker Panel
1) INDICATOR MASTER DIM BUS SEC 5 (system B)
2) INDICATOR MASTER DIM BUS SEC 6 (system A)
S 434-020
CAUTION: MAKE SURE THE DISCONNECT POPPET IS STRAIGHT BEFORE YOU INSTALL
_______ THE HOSE HALF OF THE SELF-SEAL DISCONNECT. IF TOO MUCH TORQUE IS NECESSARY TO DO THE INSTALLATION, DISCONNECT THE SELF-SEAL DISCONNECT AND AGAIN MAKE SURE THE POPPET IS STRAIGHT. AFTER THE INSTALLATION, MAKE SURE THE INDICATOR PINS EXTEND A MINIMUM OF 0.06 INCH. IF THE INDICATOR PINS ARE NOT CORRECTLY EXTENDED, FLUID FLOW WILL BE DECREASED OR STOPPED. THIS CAN CAUSE DAMAGE TO THE RESERVOIR OR THE PUMP.
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