NOTE: You must install the nut, washers, bolt and bushings as
____ shown in figure 401 view A-A or vibration can result in flight.
CAUTION: DO NOT TIGHTEN THE LARGER NUT AFTER YOU TIGHTEN THE
_______ SMALLER NUT. THE SMALLER NUT CAN BECOME LOOSE.
1) Use the torque wrench to tighten the larger nut to 750-900 pound-inches. 2) Tighten the smaller nut to 450-590 pound-inches.
(c) Connect the rod assembly to the rudder with the rod end bolt, two washers and nuts.
CAUTION: DO NOT TIGHTEN THE LARGER NUT AFTER YOU TIGHTEN THE
_______ SMALLER NUT. THE SMALLER NUT CAN BECOME LOOSE.
1) Tighten the larger nut to 300-400 pound-inches.
2) Tighten the smaller nut to 350-400 pound-inches.
S 424-037
(5) Install the vernier control rod:
NOTE: You can install the vernier control rod with the vernier
____ adjustment end in the forward or aft position. For easier adjustment of the control rod, install the vernier adjustment end at the forward position to align it with the access panel 9513.
(a)
Make sure that you can see 7 |1 threads on the forward end of the rod and the sleeve.
(b)
Connect the aft clevis on the vernier control rod to the external summing lever (Section C-C). 1) Install the bolt assembly with the two washers and two
nuts.
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737-300/400/500MAINTENANCE MANUAL
CAUTION: DO NOT TIGHTEN THE LARGE NUT AFTER YOU TIGHTEN THE
_______ SMALL NUT. THE SMALL NUT CAN BECOME LOOSE.
2) Tighten the large nut to 45-60 pound inches. 3) Tighten the small nut to 12-15 pound-inches.
(c) Connect the forward clevis on the vernier control rod to the crank (Section C-C). 1) Install the bolt assembly with the two washers and two
nuts. 2) Tighten the large nut to 45-60 pound inches. 3) Tighten the small nut to 12-15 pound-inches.
S 424-034
CAUTION: MAKE SURE YOU CORRECTLY INSTALL THE HYDRAULIC LINES TO THE PCU.
_______ MAKE SURE THE CORRECT UNIONS ARE INSTALLED IN THE HYDRAULIC PORTS. YOU CAN CAUSE DAMAGE TO THE PCU.
(6)
Connect the hydraulic lines to the PCU:
(a)
If the unions and reducer fittings are not installed, apply the hydraulic fluid or the assembly lube to the O-rings and the fittings and install in the hydraulic ports.
(b)
Connect the hydraulic lines to the PCU.
S 034-019
(7)
Connect the electrical connector to the PCU.
S 084-020
(8)
Remove the rig pin R-5.
S 044-021
(9)
Install the lockout pin for the nose gear steering (Ref 32-00-01/201).
NOTE: It is not necessary to disconnect the steering if the
____ airplane is on jacks and the nose landing gear is fully extended.
S 864-022
(10)
Supply the rudder systems A and B hydraulic power (AMM 27-21-00/201).
S 874-023
(11)
Move the rudder pedals to bleed the rudder PCU until the movement of the rudder is smooth.
(12)
Examine the hydraulic connections for leakage.
S 794-024
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737-300/400/500MAINTENANCE MANUAL
S 824-025
(13)
Do the adjustment of the rudder PCU (AMM 27-21-91/501).
S 724-026
(14)
Do the functional test of the rudder PCU (AMM 27-21-91/501).
F.
Put the Airplane Back to Its Usual Condition
S 864-027
(1)
Remove the rudder systems A and B hydraulic power
(AMM 27-21-00/201).
S 444-032
(2)
Remove the lockout pin from the nose gear steering
(AMM 32-00-01/201).
S 084-028
(3)
Close the access door 9510.
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