C.
Consumable Materials
(1)
D00633 Grease, BMS 3-33 (Recommended)
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A 737-300/400/500MAINTENANCE MANUAL
RIG PIN HOLE R-3
RIG PIN HOLE R-4
RA RB
RUDDER CONTROL CABLES
AFT QUADRANT CONTROL ROD
TORQUE TUBE
RUDDER
TRIM
ACTUATOR
SUPPORT BRACKETS
FWD FEEL AND CENTERING UNIT
SEE A
TORQUE TUBE CRANK
UPPER BEARING FEEL OUTPUT HOUSING ROD
FEEL AND CENTERING UNIT CRANK
RIG PIN
HOLE R-5
SPRING SLIDER SHAFT
LOWER BEARING
HOUSING
FEEL AND CENTERING UNIT
A
Rudder Feel and Centering Unit Installation
Figure 401
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A 737-300/400/500MAINTENANCE MANUAL
RUDDER
INDEX
TAB
PLATE
B-B
RUDDER
Rudder Travel and Index Plate
Figure 402
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D.
E.
F.
G.
A
737-300/400/500MAINTENANCE MANUAL
(2)
D00013 Grease, MIL-G-23827 (Alternate)References
(1)
27-21-00/201, Rudder and Rudder Trim Control System
(2)
27-21-87/401, Rudder Trim ActuatorAccess
(1) Location Zone 706 Vertical Fin
(2) Access Panels 9509L TE Access Panel 9513L Access Door - Rudder
Prepare for the Removal
S 864-011
(1)
Remove the power from the rudder hydraulic systems (Ref 27-21-00/201).
S 644-013
(2)
Apply some of the grease to the spring slider shaft (Fig. 401).Install the Rudder Feel and Centering Unit
S 864-014
(1)
Put the two support brackets, the feel and centering unit, and the upper and lower bearing housings in their correct positions.
S 434-015
(2)
Install these components:
(a)
The bolts that connect the support brackets to the airplane
(b)
The bolts that connect the upper bearing housing to the airplane
(c)
The bolts that connect the lower bearing housing to the airplane.
S 214-016
(3) Make sure the inner and outer rods for the feel output rod are not damaged.
NOTE: The feel output rod has two load paths.
____
S 434-017
(4)
Install the bolt assembly that connects the feel output rod to the feel and centering unit crank.
(a)
Tighten the inner nut to 45 to 60 pound-inches.
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A
737-300/400/500MAINTENANCE MANUAL
CAUTION: DO NOT TURN THE INNER NUT WHEN YOU TIGHTEN THE OUTER NUT.
_______ IT IS POSSIBLE FOR THE BOLT ASSEMBLY TO BECOME LOOSE IF THE NUTS ARE NOT INSTALLED CORRECTLY.
(b) Tighten the outer nut to 12 to 15 pound-inches.
S 494-018
(5)
Install rig pin R-5 in the feel and centering unit.
S 094-019
(6)
Remove rig pins R-3 and R-4 from the forward quadrants.
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