NOTE: Install the bolts such that the washers and nuts are on
____ the outer part of the lower gimbal.
 (d)  
Install the safety shaft and align the holes at each end of the shaft with the retainer holes.

 (e)  
Install the bolts, nuts, and washers that hold the safety shaft.

 NOTE: Install the bolts such that the washers and nuts are on
____ the lower side of the retainer.
 S 424-030
 (2)  
Do the steps that follow to attach the upper gimbal:

 (a)  
Lightly apply grease to the bearing surfaces of the ballscrew support and the outer surfaces of the retainers.

 (b)  
Adjust the turnbuckle assembly as necessary until the stabilizer ballscrew actuator will engage with the ballscrew support.

 (c)  
Turn the actuator aft to engage it with the ballscrew support.

 (d)  
Align the upper gimbal with the ballscrew support and install the left and right retainers.

 (e)  
Align the bolt holes on the retainers with the holes on the upper gimbal.

 (f)  
Install the bolts, washers, and nuts on the retainers and upper gimbal.

 S 434-031
 (3)  
Connect the anti-rotation cables with a bolt, washer, and nut (2 locations).

 (4)  
Remove the plugs and caps from the hydraulic lines and ports.

 S 434-032
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MAINTENANCE MANUAL

 S 434-034
 (5) Connect the hydraulic lines and the drain tubes to the stabilizer
 ballscrew actuator. Use clamps to hold the hydraulic lines and
 drain tubes to the supports on the actuator.
 NOTE: Before you connect these hydraulic lines, make sure that the____
 drive motor housing is full of hydraulic fluid.
 S 094-035
 (6) Remove the removal equipment for the stabilizer ballscrew.
 S 214-036
 (7) Do a visual check to make sure that you installed the stabilizer
 ballscrew actuator correctly.
 ú
 ú  S 644-037
 ú  (8) Lubricate the stabilizer ballscrew actuator (AMM 12-21-05/301).
 G.  Stabilizer Ballscrew Actuator Test
 S 864-038
 (1) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the
 overhead panel, P11:
 (a) 11B19, STAB TRIM ALT (IF INSTALLED)
 (b) 11C12, STAB TRIM SHUTOFF L
 (c) 11C13, STAB TRIM SHUTOFF R
 (d) 11H11 or 11C05, STAB TRIM CONT L
 (e) 11H20, STAB TRIM CONT R
 S 864-039
 (2) Put the RIGHT and CENTER STAB TRIM SHUTOFF valve switches on the
 control stand panel, P10, to the NORM position.

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757 MAINTENANCE MANUAL
 S 864-040
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (3) Supply power to the right or center hydraulic systems ú (AMM 29-11-00/201).
 NOTE: The right hydraulic system only supplies power to the
____ ballscrew actuator's right side secondary brake and drive hydraulic motor. The center hydraulic system only supplies power to the ballscrew actuator's left side secondary brake and drive hydraulic motor. If the right and center hydraulic systems are pressurized at the same time, you cannot find failures.
 S 864-041
 (4)  Push and hold the BRAKE BYPASS valve button on the applicable stabilizer trim control module.
 NOTE: The button is on the bottom of the unit.
____
 The force necessary to push the button should be less than 25 pounds (111 newtons). You should push the button smoothly. If the force necessary to push the button is more than 25 pounds (111 newtons), remove the hydraulic power, push the button more than once, then supply the hydraulic power.
　
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