INBD
ORIENTATION OF DOWN
LINE ON RIGHT RETRACT
ACTUATOR
B 1
1 MAIN GEAR RETRACT ACTUATORS ARE BUILT UP FOR SPECIFIC POSITIONS (LEFT OR RIGHT SIDE), THE DIFFERENCE IS THE ORIENTATION OF THE DOWN LINE FITTING. IF THE CORRECT POSITION ASSEMBLY IS UNAVAILABLE THE DOWN LINE FITTING CAN BE REPOSITIONED AND THE OFFSIDE RETRACT ACTUATOR MAY BE USED.
Main Gear Retract Actuator Installation
Figure 401 (Sheet 2)
32-32-01
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757 MAINTENANCE MANUAL
F. Procedure to Remove the Main Gear Retract Actuator
S 494-005
(1)
Use the instructions supplied with the tool to install the hoist adapter onto actuator, then attach to the hoist. Lift the hoist to decrease the pressure on the attach pins.
S 034-006
(2)
Remove nut (5) using a crowfoot wrench.
S 034-007
(3)
Install the thread protector and remove pin (1) to disconnect the rod end of the actuator from the shock strut (View A-A).
S 034-008
(4)
Disconnect the hydraulic lines (UP, RETURN and DN) from the bulkhead fittings. Install a plug on the lines and fittings.
S 494-009
(5)
Use the instructions supplied with the tool to install the pump on the hydraulic lines from the actuator. Retract the piston.
S 094-010
(6)
Remove the pump from the hydraulic lines.
S 034-011
(7)
Remove nut (10) using a crowfoot wrench. Install the thread protector and remove pin (14) to disconnect the head end of actuator from the yoke (View B-B).
S 024-012
(8)
Lower the actuator (2) and help it through the access hole. Remove the actuator.
S 094-013
(9)
Remove the hoist adapter from the actuator.
S 034-014
(10)
Disconnect the hydraulic lines from the actuator. Install plugs on the lines and fittings and hold them to install later.
TASK 32-32-01-404-015
3. Install the Main Gear Retract Actuator (Fig. 401)______________________________________
A. References
(1) AMM 06-44-00/201, Wing Access Doors and Panels
32-32-01
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757
MAINTENANCE MANUAL
(2)
AMM 12-12-01/301, Hydraulic Systems
(3)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(4)
AMM 32-00-20/201, Landing Gear Downlocks
B.
Equipment
(1)
Retract Actuator Hoist Adapter, MLG - B32008-1
(2)
Thread Protector Set, MLG - B32011-1
(3)
Retract Actuator Retraction/Extension Pump, MLG
-A32027-53, -90, -153 (As Applicable)
(4)
Boom Hoist - A20001-79
(5)
Crowfoot Wrench - F70312-38
(6)
Torque Wrench - commercially available (For
torque ranges, Ref Fig. 401)
C.
Consumable Materials
(1)
D00633 Grease - BMS 3-33 (Recommended)
(2)
D00013 Grease - MIL-G-23827 (Alternative)
(3)
D00148 Fluid, Hydraulic - BMS 3-11, Type IV,
Class 1
D.
Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT |FIG | ITEM | ................................................................................ | 401 | 1,14 | Pin | 32-32-01 | 01 | 11 | | | 2 | Retract Actuator | | | 19,21| | | 3 | Spacer | | | 15 | | | 4 | Antirotation Bolt | | | 5 | | | 5 | Nut | | | 17 | | | 6 | Washer | | | 7 | | | 7 | Nut | | | 9 | | | 8 | Tang Washer | | | 13 | | | 9 | Antirotation Bolt | | | 5 | | | 10 | Nut | | | 17 | | | 11 | Washer | | | 7 | | | 12 | Nut | | | 9 | | | 13 | Tang Washer | | | 13 | 2......…........…...................................…...........…....….........1
E. Access
(1)
Location Zones
551 Rear Spar to MLG Support Beam (Left)
651 Rear Spar to MLG Support Beam (Right)
(2)
Access Panels
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