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torque tube [1].
4) Tighten the nuts [25] to 12-15 pound-inches (53-66 newton meters) millimeters).
(f) Install the center crank [30] to the torque tube [1]:
1) Apply corrosion preventive compound, C00308 to the bolts [10].
2) Install the bolts [10], washers [11], and nuts [12] to attach the center crank [30] to the
torque tube [1].
3) Tighten the nuts [12] to 25-35 pound-inches (111-155 newton meters) newton-meters).
4) Apply a fillet seal between the center crank [30] and the torque tube [1] with sealant,
A00247. To apply fillet seal, do this task: Fillet Seal Application,
TASK 51-31-00-390-804.
(g) Install the upper crank [35] to the torque tube [1]:
1) Apply corrosion preventive compound, C00308 to the bolts [6].
2) Install the bolts [6], washers [7], and nuts [8] to attach the upper crank [35] to the torque
tube [1].
3) Tighten the nuts [8] to 25-35 pound-inches (111-155 newton meters).
4) Apply a fillet seal between the upper crank [35] and the torque tube [1] with sealant,
A00247. To apply fillet seal, do this task: Fillet Seal Application,
TASK 51-31-00-390-804.
SUBTASK 27-21-71-710-007-001
(2) Make sure the torque tube [1] turns freely and that there is no play in the horizontal and vertical
directions.
(a) If the torque tube [1] does not turn freely, do a check of the lower bearing housing [26] and
upper bearing housing [4] installation.
SUBTASK 27-21-71-420-013-001
(3) Install the bolt [36], washer [37] (under the bolt), washer [38] (under the nut), and nut [39] to
connect the vernier control rod [5] to the upper crank [35].
SUBTASK 27-21-71-420-014-001
(4) Connect the vernier control rod [9] to the center crank [30]:
(a) Install the washer [32] and bolt [31].
1) Tighten the outer bolt of the bolt [31] to 70-85 pound-inches (7.9-9.6 newton-meters).
CAUTION: DO NOT TRY TO TIGHTEN THE OUTER BOLT OF THE BOLT [31] AGAIN AFTER
YOU TIGHTEN THE NUT [34], YOU CAN CAUSE DAMAGE TO EQUIPMENT.
(b) Install the washer [33] and nut [34].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-71
Config 1
Page 407
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
1) Tighten the nut [34] to 25-30 pound-inches (2.8-3.9 newton-meters).
SUBTASK 27-21-71-420-017-001
(5) Install the rudder trim actuator, do this task: Rudder Trim Actuator Installation,
TASK 27-21-87-400-801
SUBTASK 27-21-71-420-015-001
(6) Install the bolt [18], washer [19], and nut [20] to connect the aft quadrant rod [21] to the lower
crank [22].
SUBTASK 27-21-71-420-016-001
(7) Connect the control rod [17] to the lower crank [22]:
(a) Install the bolt assembly [13], washer [14], and nut [15].
1) Tighten the nut [15] to 45-60 pound-inches (5.1-6.8 newton-meters).
CAUTION: DO NOT TRY TO TIGHTEN THE NUT [15] AGAIN AFTER YOU TIGHTEN THE NUT
[16], YOU CAN CAUSE DAMAGE TO EQUIPMENT.
(b) Install the nut [16].
1) Tighten the nut [16] to 12-15 pound-inches (1.3-1.7 newton-meters).
SUBTASK 27-21-71-640-003-001
(8) Apply grease, D00015 to the upper bearing housing [4] and lower bearing housing [26].
(a) Fill the upper bearing housing [4] and lower bearing housing [26] with grease, D00015 until
the grease is level with the surrounding structure.
SUBTASK 27-21-71-860-006-001
(9) Do this task: Put the Rudder Systems A, B, and Standby Back to the Condition Before the
Pressure Removal, TASK 27-21-00-840-802.
SUBTASK 27-21-71-080-002-001
(10) Remove the rig pin R-5 from test set rig pin kit, SPL-1585 from the output crank of the rudder feel
and centering unit.
G. Rudder Control Torque Tube Installation Test
SUBTASK 27-21-71-820-005-001
(1) Do this task: Control Rod for Main Rudder Power Control Unit Adjustment,
TASK 27-21-00-820-809-001.
SUBTASK 27-21-71-820-006-001
(2) Do this task: Control Rod for Standby Rudder Power Control Unit Adjustment,
TASK 27-21-00-820-810-001.
SUBTASK 27-21-71-710-008-001
(3) Do this task: Standby Rudder Power Control Unit Deadband Test, TASK 27-21-00-700-818-001.
SUBTASK 27-21-71-710-009-001
(4) Do this task: Rudder Travel Test, TASK 27-21-00-700-817-001.
SUBTASK 27-21-71-410-003-001
(5) Install these access panels:
Number Name/Location
324BL Vertical Fin, Trailing Edge Access
324DL Trailing Edge Access
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-71
Config 1
Page 408
Jun 10/2007
D633A101-GUN
　
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