S 434-022

 (8)  
Lubricate and install the bolt, retaining washer, nut, and cotter pin to connect the rod end of the alternate actuator to the uplock assembly (Detail A). Install the retaining washer behind the nut only. Tighten the nut to 75-200 pound-inches (8.5-22.6 newton-meters).

 S 434-023

 (9)  
Install the uplock springs.

 F.  
Do the steps that follow to make sure the uplock assembly operates correctly:

 S 494-024
 (1)  
Install the hydraulic test bench to the uplock actuator with the pressure connected to the retract port.

 S 724-025

 (2)  
Supply hydraulic pressure to the actuator until the uplock assembly moves suddenly into the open position.

 (3)  
Look to see that the pressure is not more than 1400 psig.

 S 984-027

 (4)  
Use the uplock adapter to manually move the uplock into the closed position.

 (5)  
Remove the hydraulic test bench from the uplock actuator.

 S 724-026
 S 094-028
 

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757 MAINTENANCE MANUAL
 S 494-029
 (6)  
Install the hydraulic test bench on the alternate uplock release actuator.

 S 724-030

 (7)  
Supply hydraulic pressure to the actuator until the uplock assembly again moves suddenly into the open position.

 S 724-031

 (8)  
Look to see that the pressure is not more than 550 psig.

 S 094-032

 (9)  
Remove the hydraulic test bench.

 S 434-033

 (10)
 Install the hydraulic lines on the actuators.

 G.
Put the Airplane Back in Its Usual Condition

 S 434-034
 (1) Install and adjust the up-and-locked sensors (AMM 32-61-02/201).
 S 094-035
 WARNING:_______OBEY THE REMOVAL PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (2)  Remove the door locks (AMM 32-00-15/201).
 

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757 MAINTENANCE MANUAL
 MAIN GEAR TRUCK POSITIONER SHUTTLE VALVE - REMOVAL/INSTALLATION
_______________________________________________________________
 1.  General
_______
 A.  This procedure has two tasks. The first task is for removal of the truck positioner shuttle valve for the main landing gear. The other task is for installation of the shuttle valve.
 TASK 32-32-17-004-001
 2.  Remove the Truck Positioner Shuttle Valve for Main Landing Gear (Fig. 401)
_______________________________________________________________
 A.  References
 (1)  
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System

 (2)  
AMM 32-00-15/201, Landing Gear Door Locks

 (3)  
AMM 32-00-20/201, Landing Gear Downlocks

 B.  
Access

 (1)  
Location Zones
 551 Wing Trailing Edge (Left)
 651 Wing Trailing Edge (Right)

 C.  
Prepare for Removal

 S 214-002
 (1)  Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
 S 494-003
 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)  
Open this circuit breaker on the overhead circuit breaker panel, P11, and attach a DO-NOT-CLOSE tag:

 (a)  
11G11, AUTO SPEEDBRAKE

 S 864-005
 (4)  Remove the pressure from the left hydraulic system and hydraulic reservoir (AMM 29-11-00/201).
 

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757
MAINTENANCE MANUAL

SEE B
SEE A
FWD
A
STABILIZING LINK
BOLTS
TRUCK POSITIONER SHUTTLE VALVE
FWD
(LEFT INSTALLATION SHOWN - RIGHT OPPOSITE) B
Main Landing Gear Truck Positioner Shuttle Valve Installation
Figure 401

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