Steering Cylinder Installation 521
32-51-51 Figure 401 (Sheet 1) May 15/72
Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
A51975
5E3 Steering Cylinder Installation
May 01/99 Figure 401 (Sheet 2) 32-51-51
Page 405
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
4. Check Nose Gear Steering
A. Jack nose of airplane until nose gear tires clear ground (Ref Chapter 7, Jacking Airplane).
CAUTION: TAKE CARE NOT TO OPERATE STEERING WHEEL WITH SHOCK STRUT FULLY EXTENDED AND TORSION LINKS CONNECTED OR DAMAGE TO SHOCK STRUT CENTERING CAMS MAY RESULT. CHECK THAT SHOCK STRUT IS COMPRESSED 2.10 INCHES OR MORE BEFORE OPERATING STEERING SYSTEM. DISTANCE BETWEEN BOTTOM SURFACE OR LOWER STEERING PLATE AND TOP SURFACE OF TOWING LUG MUST BE LESS THAN 21.90 INCHES.
B. Position greased turning plates under nose gear tires and lower airplane so that weight of airplane is supported by landing gear.
C. Pressurize hydraulic system A (Ref 29-11-0, MP).
D. Check that nose gear does not attempt to steer when hydraulic system A is pressurized.
E. Check that steering wheel is in neutral (centered) position.
F. Check that rudder pedals are in neutral position.
G. Rotate steering wheel counterclockwise to left stop position and hold.
(1)
Check that nose gear steers to left approximately 78 degrees.
(2)
Check for hydraulic leaks at actuator swivel.
H. Rotate steering wheel clockwise to right stop position and hold.
(1)
Check that nose gear steers to right approximately 78 degrees.
(2)
Check for hydraulic leaks at actuator swivel.
I. Release steering wheel.
(1)
Check that steering returns to neutral position.
(2)
Check that nose gear returns to centered position.
J. Jack nose of airplane until nose gear tires clear ground (Ref Chapter 7, Jacking Airplanes) and remove grease turning plates.
K. Lower airplane (Ref Chapter 7, Jacking Airplane) and remove jacks from under airplane.
L. Remove system A hydraulic power (Ref 29-11-0, MP) if no longer required.
502
32-51-51 Page 406 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/84
K12189
500 Steering Cylinder Installation May 01/99 Figure 401 (Sheet 3A) 32-51-51 Page 406A/406B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
STEERING COLLAR - REMOVAL/INSTALLATION
1. Equipment and Material
A. Grease - MIL-G-21164 or MIL-G-23827 optional to BMS 3-33 (Ref 20-30-31)
B. Ground Lock Assemblies - (Ref 32-00-01)
C. Sealant - BMS 5-95 (Ref 20-30-11)
2. Prepare to Remove Steering Collar
A. Check that ground lock assembly is installed in nose gear (Ref 32-00-01).
B. Depressurize hydraulic system A (Ref 29-11-0, Maintenance Practices).
C. Remove aft access panel from left nose wheel well bulkhead to gain access to nose wheel steering (NWSA, NWSB) turnbuckles.
3. Remove Steering Collar
A. Loosen turnbuckles.
B. Disconnect cables.
(1)
Disconnect nose wheel steering cables from aft side of steering collar (20, Fig. 401).
(2)
Remove lockwire (21) from spring pins (22) at NWSA and NWSB cable terminal ends in groove on aft side of steering collar (20).
(3)
Remove spring pins.
C. Do the steps below to remove the upper torsion link pin.
(1)
On airplanes without SB 32-1129, remove retaining pin (18) (Ref 32-21-31, R/I).
(2)
On airplanes with SB 32-1129, remove retaining bolt (18A) (Ref 32-21-31, R/I).
D. Turn collar (20) approximately 55 degrees left.
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737 AMM 飛機維護手冊 起落架 LANDING GEAR(180)
