(2)  
Crowfoot Wrench - F70312-38

 B.  
References

 (1)  
AMM 07-11-01/201, Jacking Airplane

 (2)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 (3)  
AMM 32-00-15/201, Landing Gear Door Locks

 (4)  
AMM 32-00-20/201, Landing Gear Downlocks

 (5)  
AMM 32-11-22/401, Main Gear Downlock Springs

 (6)  
AMM 32-32-02/401, Main Gear Downlock Actuator

 C.  
Access

 (1)  
Location Zones
 731/741 Main Landing Gear (MLG)
 732/742 MLG body doors
 733/743 MLG oleo doors

 D.  
Prepare for the removal of the downlock assembly.

 S 494-002
 (1)  Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
 S 494-030
 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).

 S 864-004

 (3)  
Remove the pressure from the left hydraulic system reservoir (AMM 29-11-00/201).

 (4)  
Lift the airplane (AMM 07-11-01/201).

 S 584-005
 

 32-11-12
 ALL  ú ú 01 Page 401 ú May 28/99
 
A

757 MAINTENANCE MANUAL
B B
DOWNLOCK
A
ASSEMBLY
UPPER SIDE
DOWNLOCK
STRUT

ASSEMBLY
A
SPRING
RETAINER
LOWER SIDE
STRUT
SHOCK
STRUT
INBD
DOWNLOCK ASSEMBLY
APEX NUT
NUT
WASHER
A-A
UPPER
0.003-0.005 INCH SUPPORT
(0.076-0.127 mm)
CLEARANCE

ANTIROTATION
BOLT

SPINDLE NUT
WASHER
NUT
DOWNLOCK SPLINED SPINDLE WASHER
B-B
1 INSTALL THE PIN WITH THE HEAD UP
Main Gear Downlock Assembly Installation Figure 401
APEX PIN 1
UPPER SIDE STRUT
LOWER SIDE
STRUT
UPPER SIDE STRUT
TANG WASHER
ANTIROTATION BOLT
DOWNLOCK ACTUATOR

 32-11-12
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A

757 MAINTENANCE MANUAL
 E. Remove the downlock assembly.
 S 014-006
 (1)  
Remove the downlock and replace it with a bolt.

 S 014-007

 (2)  
Remove the downlock actuator for the main landing gear (AMM 32-32-02/401).

 S 014-008

 (3)  
Remove the downlock springs (AMM 32-11-22/401).

 S 844-009

 (4)  
Hold the upper and the lower side struts to prevent movement.

 S 014-010

 (5)  
Remove the nut with the crowfoot wrench (View A-A).

 (a)  
Install the thread protector.

 (b)  
Remove the pin to disconnect the downlock assembly and the spring retainer from the upper and lower side struts.

 S 014-011
 (6)  
Remove the nut to disconnect the upper downlock spindle from the upper support fitting (Section B-B).

 S 024-012

 (7)  
Remove the downlock assembly.

 TASK 32-11-12-404-013
 3.  Install the Downlock Assembly for the Main Landing Gear (Fig. 401)_______________________________________________________
 A. Equipment
 (1)  
Thread Protector Set, MLG - B32011-14

 (2)  
Crowfoot Wrench - F70312-38
　
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本文鏈接地址：757 AMM 飛機(jī)維護(hù)手冊 起落架 CHAPTER 32 - LANDING GEAR 1(104)