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(d) Apply a layer of grease, D00633 to the shank and threads of the bolts [17].
(e) Install the bolts [17], washers [18], washers [19] and nuts [20] to attach the ballscrew
assembly [6] to the yoke [16].
(f) Make sure the ballscrew assembly [6] is installed correctly in the yoke [16]:
1) Turn the transmission assembly [4] until the nut [29] on the U-joint [26] is up.
2) Turn the ballscrew nut [28] until the upstop is 1808 from the upstop [27] on the yoke [16].
3) If the ball returns [10] on the ballscrew nut [28] are not in the correct position, then
change the position of the ballscrew assembly [6]:
NOTE: On transmission No. 3, make sure the ball returns [10] are on the outboard
side. On transmission No. 6, make sure the ball returns [10] are on the inboard
side.
a) Remove the nuts [20], washers [19], washers [18] and bolts [17] that attach the
ballscrew assembly [6] to the yoke [16].
b) Turn the ballscrew assembly [6] 1808 in the yoke [16].
c) Install the bolts [17], washers [18], washers [19] and nuts [20].
(g) Tighten the nuts [20].
SUBTASK 27-51-31-420-003
(3) Connect the ballscrew assembly [6] with the gimbal [14] to the carriage [8]:
(a) Move the gimbal [14] to the downstop on the ballscrew assembly [6].
NOTE: On transmission No. 3, make sure the ball returns [10] on the ballscrew nut [28]
are on the outboard side. On transmission No. 6, make sure the ball returns [10]
on the ballscrew nut [28] are on the inboard side.
(b) Move the carriage [8] to align with the gimbal [14].
GUN 155 PRE SB 737-57-1264
(c) Apply grease, D00633 to the inside and outside surfaces of the carriage bushing [9] and
carriage bushing [13].
GUN ALL
(d) Install the carriage bushing [9] and carriage bushing [13] to attach the gimbal [14] to the
carriage [8].
(e) Install the bolts [7], washers [12] and nuts [11] that attach the gimbal bushing [9] and gimbal
bushing [13] to the carriage [14].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-51-31
Page 408
Oct 10/2007
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(f) Tighten the nuts [11] to 65-75 pound-inches (7.4-8.4 newton-meters) more than the run-on
torque.
SUBTASK 27-51-31-420-004
(4) Connect the torque tubes [1] to the transmission assembly [4]:
(a) Apply grease, D00633 to the coupling sleeves [2].
(b) Put the splined couplings [5] in the coupling sleeves [2].
(c) Install the screws [3] to attach the torque tubes [1] to the transmission assembly [4].
(d) Install lockwire on the screws [3].
SUBTASK 27-51-31-640-003
(5) Apply grease, D00633 to the end of the plunger on the torque trip indicator [25] and push it down
around the sides of the plunger.
SUBTASK 27-51-31-640-001
(6) Lubricate the transmission assembly [4], ballscrew assembly [6] and gimbal [14], do this task:
Inboard Flap Outboard Ballscrew and Gimbal Lubrication, TASK 12-22-51-640-803.
SUBTASK 27-51-31-210-001
(7) Make sure the torque trip indicator [25] on the transmission assembly [4] is set.
SUBTASK 27-51-31-820-001
(8) Do this task: Trailing Edge Flap Drive System Adjustment, TASK 27-51-00-820-802.
G. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-31-410-001
(1) Do this task: Inboard Flap Support Aft Fairing Installation, TASK 27-51-18-400-802.
SUBTASK 27-51-31-440-001
(2) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
SUBTASK 27-51-31-860-011
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL SURFACES, THE
THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE
SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO
PERSONS AND DAMAGE TO EQUIPMENT.
(3) Supply system B hydraulic power, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
SUBTASK 27-51-31-860-003
(4) Use the primary system to retract the flaps to the retracted position. To retract the flaps, do this
task: Trailing Edge Flap System Operation With Primary Control, TASK 27-51-00-860-801.
SUBTASK 27-51-31-860-004
(5) Use the primary system to extend and retract the flaps. To extend and retract the flaps, do this
task: Trailing Edge Flap System Operation With Primary Control, TASK 27-51-00-860-801.
SUBTASK 27-51-31-210-002
(6) Make sure the torque trip indicator [25] on the transmission assembly [4] is set.
SUBTASK 27-51-31-860-012
(7) Remove system B hydraulic power, do this task: Hydraulic System A or B Power Removal,
TASK 29-11-00-860-805.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
　
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