(2)
The installation of the replacement module.
B.
The module has a housing and six manual isolation valves. The removal and installation instructions of the manual isolation valves can be found in 27-31-87/401.
TASK 27-31-84-004-018
2. Isolation Valves Hydraulic Module Removal (Fig. 401)
_________________________________________
A. References
(1)
27-31-00/201, Elevator and Tab Control System
B.
Access
(1)
Location Zone
704 Tail Cone
711 Elevator and Tab, LH
712 Elevator and Tab, RH
(2)
Access Panels
3701 Stabilizer Trim Access Door
C.
Procedure
S 864-004
(1)
Do this task: "Remove Elevator Hydraulic Systems A and B" (Ref 27-31-00/201).
S 014-005
(2)
Open the access door 3701.
S 034-006
WARNING: RELEASE THE CONNECTION SLOWLY AND LET THE PRESSURE DECREASE
_______ BEFORE YOU COMPLETELY REMOVE THE HYDRAULIC LINES. IF YOU DISCONNECT THE HYDRAULIC LINE WHEN IT HAS PRESSURE, A SPRAY OF HYDRAULIC FLUID CAN CAUSE INJURY TO PERSONS.
(3)
Remove the eight hydraulic lines from the module.
(a)
Install caps and plugs on the open valve ports and the hydraulic lines.
S 024-001
(4)
Remove the module:
(a)
Remove the bolts, washers, nuts, and spacer that attach the module to the airplane structure.
(b)
Remove the module from the airplane.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-31-84
ALL ú ú 01 Page 401 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
SEE A
LOCKING
BAR
ISOLATION VALVES HYDRAULIC MODULE SEE B
HYDRAULIC LINE
PCU AND ELEVATOR
NO. 6 RIGHT ELEVATOR
(EXAMPLE)
AUTOPILOT ACTUATOR
(SYSTEM B)
FWD
NO. 5 RUDDER PCU/YAW
DAMPER (SYSTEM B)
A
NO. 4 FEEL ACTUATOR
(SYSTEM B)
NO. 3 LEFT ELEVATOR
PCU AND ELEVATOR
AUTOPILOT ACTUATOR
(SYSTEM A)
N0. 2 RUDDER
PCU/YAW DAMPER
(SYSTEM A)
NO. 1 FEEL ACTUATOR
(SYSTEM A)
VALVES
(POSITIONED
OPEN)
FWD
B
NOTE:ISOLATION VALVES NO. 1 THRU NO. 6 ARE SHOWN POSITIONED OPEN.
Isolation Valves Hydraulic Module Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-31-84
ALL ú ú 01 Page 402 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 034-002
(5)
Remove the locking bar from the module:
(a)
Remove the upper and lower mounting bolts, washers, and nut.
(b)
Remove the locking bar from the module.
TASK 27-31-84-404-003
3. Isolation Valves Hydraulic Module Installation (Fig. 401)______________________________________________
A. Consumable Materials
(1)
D00054 Lube, Skydrol Assembly - MCS 352
(2)
G00062 Fluid - Hydraulic, Fire Resistant, BMS 3-11
B.
References
(1)
12-12-00/301, Hydraulic Reservoir
(2)
27-31-00/201, Elevator and Tab Control System
C.
Access
(1)
Location Zone
704 Tail Cone
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