E.
Procedure
(1) S 034-007Remove the bolts and the lock plate from the lower end of the lower plate (View C-C).
(2) S 034-008Remove the steering nut from the top shock strut with the wrench adapter to release the lower plate.
(3) S 034-009Use the spanner wrench to remove the retainer nut for the swivel valve at the top trunnion (View D-D).
(4) S 034-010Use the steering actuator wrench to remove the nuts on the lower actuator trunnion. The nuts attach the left and right actuators to the lower plate (View B-B).
(5) S 034-011Move the lower plate from the top plate (View B-B).
(6) S 034-012Loosen the top trunnion nut on the actuator that you will remove.
(7) S 984-013Turn the upper torsion link to turn the steering collar to get the clearance to remove the end bolt of the actuator rod.
(8) S 034-014Disconnect the actuator rod from the collar (View A-A).
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S 024-015
CAUTION: DO NOT CAUSE DAMAGE TO THE TRUNNION BEARINGS WHEN YOU REMOVE
_______ THE ACTUATOR. THE ACTUATOR WEIGHS APPROXIMATELY 45 POUNDS.
(9)
Hold the actuator up while you remove the top trunnion nut with the actuator wrench.
S 024-016
(10)
Remove the actuator from the airplane.
TASK 32-51-11-424-057
3. Install the Actuator for the Nose Wheel Steering (Fig. 401)
________________________________________________
A. References
(1)
AMM 12-12-01/301, Hydraulic System Reservoir Servicing
(2)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(3)
AMM 32-21-09/401, Nose Gear Torsion Links
(4)
AMM 32-51-00/501, Nose Wheel Steering System Test
B.
Equipment
(1)
Wrench-Adapter-Steering Nut, NLG - A32045-85
(2)
Spanner Wrench - F72959-35
(3)
Wrench-Steering Actuator, NLG - A32035-1
C.
Consumable Materials
(1)
D00633 Grease - BMS 3-33 (Preferred)
(2)
D00013 Grease - MIL-G-23827 (Alternative)
(3)
C00308 Compound - Corrosion Preventive -MIL-C-11796
(4)
D00153 Fluid-Hydraulic-BMS3-11
(5)
A00247 Sealant - Chromate Type-BMS5-95
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D. Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Actuator Assembly - NLG Steering | 32-51-11 | 01 | 65 | | | 2 | Nut - Trunnion | | | 39 | | | 3 | Bearing - Trunnion | | | 40 | | | 4 | Cap | 32-21-01 | 01 | 95 | | | 5 | Bolt | | | 80 | | | 6 | Washer | 32-21-00 | 01 | 390 | | | 7 | Washer | | | 395 | | | 8 | Washer | 32-21-01 | 01 | 85 | | | 9 | Nut | | | 90 | | | 10 | Pin | | | 100 | | | 11 | Nut - Retainer | 32-51-11 | 01 | 60 | 2.......….......…...................................…...........….....…........1
E. Access
(1)
Location Zones
211 Control Cabin (Left)
212 Control Cabin (Right)
711 Nose Landing Gear (NLG)
F.
Procedure
S 864-018
(1)
Make sure the pressure is removed from the left hydraulic system and reservoir (AMM 29-11-00/201).
(2)
Make sure the steering collar is held against the top plate.
S 624-020
(3)
Apply corrosion preventive compound to the top and lower actuator trunnion journals and bearings in the top and lower plates.
S 984-019
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S 434-021
CAUTION:_______ THE TRUNNION BEARINGS ARE PRECISION BEARINGS. DO NOT USE A
HAMMER ON THEM OR SHAKE THEM WHEN YOU INSTALL THE ACTUATOR.
MAKE SURE THE BEARINGS ARE ALIGNED DURING INSTALLATION.
CAUTION: MAKE SURE THE INDEX PIN ON THE SWIVEL VALVE IS CORRECTLY 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(131)
