S 864-004
(3)
Remove the pressure from the left hydraulic system and the hydraulic reservoir (AMM 29-11-00/201).
D.
Procedure to Remove the Actuator
(1)
Disconnect the hydraulic line from the actuator.
(2)
Install a plug in the line and fitting.
S 984-007
(3)
Apply a force to the uplock hook to manually put the uplock assembly into the closed position.
S 034-005
S 494-006
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MAINTENANCE MANUAL
Main Landing Gear Alternate Uplock Release Actuator Installation
Figure 401
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S 034-008
(4)
Remove the bolt to disconnect the rod end of the actuator from the uplock assembly (Detail A).
S 024-009
(5)
Remove the nut to disconnect the head end of the actuator from the uplock assembly and remove the actuator.
TASK 32-35-01-404-010
3. Install the Alternate Uplock Release Actuator for the Main Landing Gear_______________________________________________________________________ (Fig. 401)
A. References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(3)
AMM 32-00-15/201, Landing Gear Door Locks
B.
Consumable Materials
(1)
D00633 Grease - BMS 3-33 (Preferred)
(2)
D00013 Grease - MIL-G-23827
(Optional to BMS 3-33)
(3)
D00148 Fluid, Hydraulic - BMS 3-11, Type IV,
Class 1
C.
Access
(1)
Location Zone
143 MLG Wheel Well (Left)
144 MLG Wheel Well (Right)
211 Control Cabin (Left Side)
212 Control Cabin (Right Side)
D.
Procedure to Install the Actuator
S 614-011
(1)
Fill the actuator with hydraulic fluid.
S 494-012
(2)
Install a plug in the hydraulic fitting.
S 424-014
(3)
Apply grease and install the nut, retaining washer, and cotter pin to connect the head end of the actuator to the uplock assembly. Torque the nut to 75-200 pound-inches (8.47-22.60 newton-meters).
S 424-024
(4)
Apply grease and install the bolt, retaining washer, nut, and cotter pin to connect the rod end of the actuator to the uplock assembly. Install the washer behind the nut only. Torque the nut to 75-200 pound-inches (8.47-22.60 newton-meters).
S 864-015
(5)
Make sure the pressure is removed from the left hydraulic system and reservoir (AMM 29-11-00/201).
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S 434-016
(6)
Connect the hydraulic line to the actuator port.
S 644-017
(7)
Lubricate the grease fittings.
E.
Do a Check of the Actuator for Hydraulic Leaks
S 714-018
CAUTION: DO NOT HOLD THE "ALL DOORS OPEN" SWITCHES IN THE "ARM" AND
_______ "OPEN" POSITIONS MORE THAN TWO (2) SECONDS. IF YOU HOLD THE SWITCHES MORE THAN TWO (2) SECONDS THIS CAN CAUSE THE POWER PACK TO BECOME TOO HOT, AND THE ALTERNATE EXTENSION SYSTEM WILL NOT OPERATE.
(1)
At the same time, move the ALL DOORS OPEN ARM switch to ARM and the ALL DOORS OPEN switch to OPEN. The switches are on the electrical service panel for the main wheel well, P72.
S 714-019
(2)
Make sure the alternate actuator extends and moves the uplock assembly suddenly open.
S 794-019
(3)
Examine the actuator for hydraulic leaks.
F.
Put the Airplane Back to Its Initial Condition
S 614-020
(1) Make sure the fluid in the hydraulic reservoir is at the correct level. Fill if it is necessary (AMM 12-12-01/301).
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