(19)
Install the gland nut (12) on the outer cylinder (17). Tighten the gland nut (12) 50 to 400 pound-feet lube torque.
(a) Turn the gland nut (12) to the nearest slot to allow the installation of the lockplate (1).
(20)
Measure the distance the gland nut (12) extends below the outer cylinder (17). The dimension must equal the dimension you recorded in step 2.C.(1), within 0.01 inch.
(21)
Measure the full stroke of the inner cylinder (16) by manually compressing and extending it.
500
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May 01/99
523 Main Gear Shock Strut Seal Replacement
Feb 20/85 Figure 801 (Sheet 1) 32-11-21
Page 805
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Main Gear Shock Strut Seal Replacement 500
32-11-21 Figure 801 (Sheet 2) Feb 20/85
Page 806
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
504 Main Gear Shock Strut Seal Replacement
Aug 01/96 Figure 801 (Sheet 3) 32-11-21
Page 807
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
NOTE: The full stroke dimension should fall within the range given in Figure 801, (Sheet 3). If not, do the step that follows.
(a) Disassemble the shock strut and look for missing parts or parts that are not installed correctly.
(22) Install gland nut lock plate (1).
D. Restore Airplane to Normal Configuration
(1)
Lower airplane (Ref Chapter 7, Jacking Airplane).
(2)
Wipe exposed inner cylinder with hydraulic fluid.
(3)
Service shock strut (Ref Chapter 12, Main Landing Gear Shock Strut Servicing).
(4)
Check for leaks at gland nut.
(5)
Remove airplane jacks.
(6)
Tag strut to show status of spare seals, either, "static spare seal used," or, "both dynamic seals used."
(7)
Close all landing gear circuit breakers on P6 panel.
3. Replace Active Inner Cylinder Seals and Install Spare Seals
A. Equipment and Materials
(1) Same as that listed in par. 2.A.
B. Prepare Shock Strut for Seal Replacement
(1)
Refer to par. 2.B.
(2)
When shock strut is deflated, remove charging valve.
CAUTION: MAKE SURE SHOCK STRUT IS COMPLETELY DEFLATED BEFORE REMOVING CHARGING VALVE. VALVE CAN BLOW OUT AND INJURE PERSONNEL.
(3)
Jack airplane until weight is off gear (Ref Chapter 7, Jacking Airplane).
C. Remove Inner Cylinder Seals
(1)
Remove gland nut lockplate (1). Measure and record the distance the gland nut (12) extends below the outer cylinder (17) for use in subsequent step (Fig. 801, Detail B).
(2)
Disconnect torsion links at apex (Ref 32-11-51 R/I).
(3)
Disconnect hydraulic lines at brakes.
(4)
Disconnect electrical cables at axle.
(5)
Turn inner cylinder (16) until axle is parallel to trunnion link.
(6)
Place cloth padding around shock strut inner cylinder below gland nut (12, Fig. 801) to prevent sharp edges from damaging inner cylinder if nut should accidently be dropped allowing nut to slide down inner cylinder.
(7)
Place drip tray to catch hydraulic fluid when gland nut is removed.
CAUTION: CLEAN ANY HYDRAULIC FLUID FROM TIRES IMMEDIATELY TO AVOID DETERIORIZATION.
(8)
Remove gland nut lockplate (l) on aft side of shock strut. Use gland nut wrench to unscrew gland nut and slide nut to bottom of inner cylinder.
(9)
Slide scraper ring and adapter (10) and (11) down onto nut.
NOTE: Coating of outside diameter of lower bearing should be examined at this time. If coating shows evidence of deterioration, replace bearing or repair coating per instructions in overhaul manual. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737 AMM 飞机维护手册 起落架 LANDING GEAR(36)
