(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.
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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
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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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