(b)  
Loosen the nut on the bolt that attaches the actuator to the structure.

 (c)  
Remove the two bolts from the actuator.

 (d)  
Remove the actuator from the airplane.

 S 034-008
 (7)  
Remove the two hydraulic unions from the actuator:

 (a)  
Install the caps in the hydraulic ports.

 TASK 27-62-71-404-009
 3.  No. 4 and 5 Ground Spoiler Actuator Installation (Fig. 401)________________________________________________
 A. Consumable Materials
 (1)  
D00196 Hydraulic Fluid - BMS 3-11

 (2)  
D00567 Skydrol Assembly Lube - MCS 352

 B.
References

 (1)  
12-12-00/301, Hydraulic Reservoir

 (2)  
24-22-00/201, Manual Control

 (3)  
27-62-00/201, Speed Brake Control System

 (4)  
27-62-71/501, No. 4 and 5 Ground Spoiler Actuator

 C.
Access

 (1)  
Location Zone 309, 409 Left Wing Trailing Edge Inboard Flaps and Spoilers

 D.
Procedure

 S 434-010
 (1)  
Install the hydraulic unions in the actuator:

 (a)  
Remove the caps from the hydraulic ports on the actuator.

 (b)  
Apply a thin layer of the hydraulic fluid or the assembly lube on the O-rings.

 (c)  
Install the O-rings and the unions in the hydraulic ports.

 S 424-011
 (2)  
Install the ground spoiler actuator:

 (a)
Put the actuator in its position in the airplane.

 (b)
Install the two bolts with the heads outboard.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
737-300/400/500MAINTENANCE MANUAL
 (c)  
Install the washer and nut on the bolt that attaches the piston rod end to the idler crank. 1) Tighten the nut to 290-410 pound-inches.

 (d)  
Install the washer and nut on the bolt that attaches the actuator to the structure. 1) Tighten the nut to 630-950 pound-inches.

 S 434-012
 (3)  
Connect the hydraulic tubes to the actuator:

 (a)  
Make sure the hydraulic pressure in system A is released (Ref 27-62-00/201).

 (b)  
Remove the caps from the hydraulic tubes.

 (c)  
Connect the hydraulic tubes to the unions on the actuator.

 S 864-013
 (4)  
Move the FLIGHT CONTROL SPOILER A and B switches to the OFF
 position.

 S 864-014

 (5)  
Supply the system A hydraulic power (Ref 27-62-00/201).

 S 874-015

 (6)  
Move the speed brake lever through its full cycle to bleed the hydraulic system.

 S 794-016

 (7)
Examine the hydraulic connections on the actuator for leakage.

 S 824-017

 (8)  
Do the adjustment of the ground spoiler actuator (Ref 27-62-71/501).

 S 724-018

 (9)  
Do the functional test of the ground spoiler actuator
 (Ref 27-62-71/501).

 E.
Put the Airplane Back to Its Usual Condition

 (1)  
Supply the system B hydraulic power (Ref 27-62-00/201).

 S 864-020

 (2)  
Move the flap control lever to the UP position to retract the trailing edge flaps.

 (3)
Remove the systems A and B hydraulic power (Ref 27-62-00/201).

 S 864-019
 S 864-021
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 (4)  S 864-022Remove the electrical power (Ref 24-22-00/201).
 (5)  S 614-023Fill the hydraulic reservoirs if it is necessary (Ref 12-12-00/301).
　
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