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78-31-02
ALL ú ú C01 Page 410 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
THRUST REVERSER HYDRAULIC ACTUATORS - REMOVAL/INSTALLATION
__________________________________________________________
1. General
_______
A. This procedure has two tasks. They are the removal and the installation of the actuators.
B. This procedure applies to both actuator types: locking and non-locking. Differences are noted in the procedure.
C. All hydraulic connections should be tightened to 255 pound-inches (28.9 Nm), loosened and retightened to 255 pound-inches (28.9 Nm).
D. There are two configurations of locking actuators.
(1) Upper locking actuators with a hydraulic flow restrictor have a restrictor check valve in the deploy port of the actuator.
NOTE: The restrictor tee in the strut has the poppet valves
____ removed and does not restrict flow.
(a) These restrictor check valves were installed on airplanes after line no. 2228.
(2)
Upper locking actuators without a hydraulic flow restrictor have a flow restrictor in a restrictor tee located in the strut, not in the actuator.
(a) These actuators were installed on airplanes before line no. 2228.
E.
For the upper actuator:
(1)
Connected to the upper side of the extend port is a flexible hydraulic line and connected to the lower side of the extend port is a flex shaft tube.
(2)
Connected to the upper side of the retract port is a flexible hydraulic line and connected to the lower side of the retract port is a semi-rigid hydraulic tube.
F.
For the center actuator:
(1)
Connected to the upper side of the extend port is a flex-shaft tube and connected to the lower side of the extend port is a flex-shaft tube.
(2)
Connected to the upper side of the retract port is a semi-rigid hydraulic tube and connected to the lower side of the retract port is a hydraulic cap.
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78-31-03
ALL ú ú C05 Page 401 ú Mar 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
G. For the bottom actuator:
(1)
Connected to the upper side of the extend port is a flex-shaft tube and connected to the lower side of the extend port is a hydraulic cap.
(2)
Connected to the upper side of the retract port is a semi-rigid hydraulic tube and connected to the lower side of the retract port is a hydraulic cap.
TASK 78-31-03-004-001-C00
2. Hydraulic Actuator Removal
__________________________
A. Equipment
(1)
Rig Pin - MS20392-4C (or equivalent 0.309 - 0.311-inch (7.8 mm) rod or bolt)
(2)
B78009-2/21 - Thrust Reverser Maintenance Lock Equipment
(3)
5-Gallon Pail (20 liters) (Commercially Available)
B. References
(1)
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System
(2)
AMM 29-15-00/201, Hydraulic Systems A, B and Standby
(3)
AMM 71-11-02/201, Fan Cowl Panels
(4)
AMM 78-31-00/201, Thrust Reverser System
(5)
AMM 78-34-03/401, Proximity Sensors
C. Access
(1) Location Zones
504/604 Thrust Reverser - Left
505/605 Thrust Reverser - Right
502/602 Fan Cowl - Left
503/603 Fan Cowl - Right
101 Control Cabin - Left
102 Control Cabin - Right
D. Prepare for the Removal
S 864-075-C00
CAUTION: DO NOT PERMIT THE ACTUATOR ROD END TO TURN OR BE TURNED WHEN
_______ YOU HANDLE THE ACTUATOR. DAMAGE TO THE INTERNAL FEEDBACK MECHANISM CAN OCCUR.
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