3. Install Ground Spoiler Control Valve
A. Check that valve lever and valve slide on new valve operate smoothly through full range of travel.
B. Remove protective caps from ports in valve.
C. Install O-ring and reducer in each of the five valve ports. Lightly lubricate O-rings with hydraulic fluid or Skydrol Assembly Lube prior to installation.
D. Ensure that hydraulic system A is depressurized and then remove protective caps from hydraulic lines.
E. Position valve on mounting bracket and start five tubing connections. (Fig. 401).
F. Install four valve mounting bolts with washer under bolt head.
G. Check that the two bolts in the valve handle are installed with bolt heads up.
H. Tighten the five tubing connections.
I. Position speed brake control lever in DOWN detent.
J. Install rigging pin in speed brake forward drum.
K. Position rigging tool on ground spoiler control valve so that dimension A is 0.70 +0.01 inch.
L. Attach control rod to ground spoiler control valve. Install bolt with head up and secure with washer, nut and cotter pin. If bolt will not fit freely in rod end:
(1)
Loosen checknut and adjust rod end until bolt can be installed.
(2)
Lubricate rod end threads with grease.
(3)
Tighten checknut and check for proper rod end thread engagement. Rod end threads shall be visible in inspection hole.
M. Remove rigging tool from control valve lever and remove rigging pin.
N. Test control valve. Refer to Ground Spoiler Control Valve - A/T.
Aug 15/69 27-62-41 Page 403 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
GROUND SPOILER CONTROL VALVE - ADJUSTMENT/TEST
1. Ground Spoiler Control Valve Test
A. Test Ground Spoiler Control Valve
(1)
Provide electrical power.
(2)
Provide system A hydraulic power. Refer to 27-62-0, Speed Brake Control System - MP.
(3)
Check valve and hydraulic connections for leakage.
(4)
Actuate speed brake control lever to ensure that hydraulic system is bled.
(5)
From DOWN position, move speed brake control lever toward UP position.
(6)
Check that ground spoiler panels move from down to full up when the speed brake control lever is either 31 +3 degrees or 2.96\+0.28) inches measured along position indicating marker surface from DOWN position.
(7)
From UP position, move speed brake control lever toward DOWN position.
(8)
Check that ground spoiler panels move from up to full down when the speed brake control lever is either 22 +3 degrees or 2.10\+0.28 inches measured along position indicating marker surface from the DOWN position.
(9)
Remove system A hydraulic power. Refer to 27-62-0.
(10)
Provide electrical power if not longer required.
(11)
Check hydraulic reservoir and service if required. Refer to Chapter 12, Hydraulic Servicing.
500
Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-62-41 Page 501
GROUND SPOILER INTERLOCK VALVE CABLE - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Grease - MIL-G-23827, or DC-33, light consistency, Dow Chemical Corp. (Ref 20-30-21)
2. Remove Ground Spoiler Interlock Valve Cable
A. Depressurize hydraulic systems A and B (Ref 27-62-0 Maintenance Practices).
B. Remove flexible cable (Fig. 401).
(1)
Remove bolt attaching lower rod end to landing gear torsion link.
(2)
Remove lower clamp and spacer from protective boot. Slide boot until guide tube is exposed.
(3)
Break lockwire and turn guide tube to disconnect it from rod end adapter.
(4)
Remove rod end and rod end adapter.
(5)
Slide guide tube all the way onto swivel tube and remove collar from cable.
(6)
Remove guide tube.
(7)
Remove bolt attaching upper rod end to pivot on valve lever.
(8)
Remove cable from flexible tube by pulling at upper end.
C. Remove flexible tube.
(1)
Disconnect flexible tube from swivel at both ends by turning captive bushings.
(2)
Remove guide adjacent to landing gear trunnion.
(3)
Remove two clamps on wing structure and three clamps on drag strut.
(4)
Remove flexible tube from airplane.
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