B. Standard Tools and Equipment
(1) Container to catch hydraulic fluid (approximately 6 gal capacity)
C. References
(1)
12-40-00/201, Cleaning and Washing
(2)
29-09-00/201, Hydraulic Reservoir Pressurization System
D. Access
(1) Location Zone
215 Keel Beam
E. Procedure
S 864-002
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6-3 Circuit Breaker Panel 1) INDICATOR MASTER DIM BUS BAT 2) INDICATOR MASTER DIM BUS NO. 1 DC 3) INDICATOR MASTER DIM BUS NO. 2 DC 4) INDICATOR MASTER DIM BUS SECT 1
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A 737-300/400/500MAINTENANCE MANUAL
SEE A STANDBY HYDRAULIC SYSTEM SWITCH LOW QUANTITY BSEE
RESERVOIR STANDBY
KEEL BEAM
ELECTRICAL CONNECTOR
FWD O-RING
STANDBY HYDRAULIC SYSTEM
LOW QUANTITY
A
SWITCH
FLOAT
LOW QUANTITY SWITCH B
Standby Hydraulic System Low Quantity Switch Installation Figure 401
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A 737-300/400/500MAINTENANCE MANUAL
5) INDICATOR MASTER DIM BUS SECT 2 6) INDICATOR MASTER DIM BUS SECT 3 7) INDICATOR MASTER DIM BUS SECT 4 8) INDICATOR MASTER DIM BUS SECT 5 9) INDICATOR MASTER DIM BUS SECT 6 10) MASTER CAUTION ANNUNCIATOR NO. 1 11) MASTER CAUTION ANNUNCIATOR BAT
(2) S 864-003Put the FLT CONTROL B switch to the OFF position.
(3) S 864-004Release pressure from system B hydraulic reservoir (Ref 29-09-00/201).
(4) S 494-031Install the lock on the depressurization valve when the valve is open.
(5) S 034-005Remove the supply line for the standby hydraulic pump at the quick-disconnect at the bottom of the standby hydraulic reservoir.
(6) S 864-012Put the hose, with the quick-disconnect coupling half installed, in a container.
(7) S 684-014Drain the hydraulic fluid into the container.
(8) S 164-015Clean all hydraulic fluid from the installation area if it is necessary (Ref 12-40-00/201).
(9) S 494-000Connect the quick-disconnect coupling half to the quick-disconnect at the bottom of the standby hydraulic reservoir.
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A 737-300/400/500MAINTENANCE MANUAL
S 034-016
(10)
Remove the electrical connector from the low quantity switch.
S 024-017
(11)
Remove the low quantity switch from the standby hydraulic system reservoir.
S 094-018
(12)
Remove the quick-disconnect coupling half and the hose.
TASK 29-33-21-404-006
3. Standby Reservoir Low Quantity Switch Installation (Fig. 401)
__________________________________________________
A. Consumable Materials
(1)
D00567 Skydrol Assembly Lube - MCS 352
(2)
D00568 Fluid - Hydraulic, BMS 3-11
(3)
A00626 Sealant - BMS 5-95
B. References
(1)
12-12-00/301, Hydraulic Reservoir
(2)
24-22-00/201, Manual Control
(3)
29-09-00/201, Hydraulic Reservoir Pressurization System
C. Access
(1) Location Zone
215 Keel Beam
D. Procedure
S 864-007
(1)
Supply electrical power (Ref 24-22-00/201).
S 644-019
(2)
Apply assembly lube or hydraulic fluid to the O-ring.
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