NOTE: Use feeler gage to determine that gap between upper cam and spacer does not exceed 0.005 inch after retainer rings have been installed. If gap is greater than
0.005 inch, refer to Overhaul Manual.
NOTE: Key may be punch marked to provide a snug fit.
(28)
Assemble shock strut: (Fig. 804)
(a)
Measure and record dimension t + 0.001 inch.
(b)
Measure and record dimension T + 0.001 inch.
(c)
Use ring compressor to compress ring and install upper orifice support tube into inner cylinder.
(d)
Insert inner cylinder in outer cylinder using upper orifice support tube extension tool as guide.
(29)
Check that torsion link lugs on inner cylinder are opposite outer cylinder drag brace lug.
(30)
Slide lower bearing against newly installed channel seal and slide bearing and lower centering cam as a unit into outer cylinder.
NOTE: Lower centering cam should protrude 0.03 to 0.06 inch below lower end of outer cylinder. Check that upper centering cam and lower centering cam are aligned so that notched valley of lower cam is in line with lobe of upper cam.
(31)
Slide scraper adapter (15) with rod wiper (7) into position against lower bearing.
(32)
Slide gland nut (8) into position to screw onto outer cylinder.
NOTE: If trouble is experienced in moving lower bearing into outer cylinder, align inner cylinder and place a wooden block of equal dimensions on each side of inner cylinder below gland nut. Jack inner cylinder until nut reaches outer cylinder.
(33)
Apply corrosion preventive compound to thread area on gland nut and outer cylinder.
(34)
Screw shock strut gland nut (8) on outer cylinder and tighten nut 75 to 100 pound-feet torque then back off nut to align nearest slot for lock.
(35)
Install gland nut lock (18).
(36)
Remove orifice support tube extension tool from orifice tube extension (Ref Fig. 804).
(a) Measure distance support tube extends through outer cylinder. Dimension D measured must equal dimension T (step 28b) minus distance t (step 28a) within +
0.002 in. If not, this is an indication that orifice support tube is not seated properly against inner surface of outer cylinder. Disassemble and reassemble parts accordingly.
(37)
Install lockwasher.
500
Feb 01/95 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-21-11 Page 811
CAUTION: INSTALL THE LOCKWASHER CORRECTLY ON THE UPPER ORIFICE SUPPORT TUBE. MAKE SURE THE MATING SURFACES OF THE LOCKWASHERS AND THE OUTER CYLINDER ARE FLUSH WITH NO CLEARANCE. IF YOU DO NOT INSTALL THE LOCKWASHER CORRECTLY, IT CAN CAUSE DAMAGE TO THE THREAD OF THE SUPPORT TUBE.
NOTE: The lockwasher key does not fully mate with the bottom of the groove after normal assembly.
(a)
Install the special nut in the orifice support tube extension.
(b)
Tighten the nut to 500-700 pound-inches.
(38)
Install piston position fitting assembly and connect piston position spring cartridge.
(39)
Install special washer, screw jamnut onto orifice support tube extension and tighten jamnut 1500 to 2000 pound-inches. Install lockwire between jamnut and adjacent bolt which holds position piston pulley mount.
NOTE: Jamnut must be only finger-tight until piston position fitting assembly is installed.
(40)
Install air valve in orifice support tube extension and instal1 lockwire between air valve and jamnut installed on orifice tube extension.
(41)
Disconnect cable clamps from steering and piston position cables.
(42)
Roll wheels aft until lock brace assembly locks.
(43)
Install ground lock assembly (Ref 32-00-01).
500
32-21-11 Page 812 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/93
500 Shock Strut Support Tube Installation Jun 20/85 Figure 804 32-21-11 Page 812A/812B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(44)
Check that torsion link lugs on inner cylinder are opposite outer cylinder drag brace lug.
(45)
Check that length of fully extended gear is 24.0 inches as indicated on nose gear servicing chart (Ref 12-15-41, Servicing).
(46)
Clean area for new sealant fillet using a new or laundered white cloth and toluene.
(47)
Apply thin coat brush of primer to seal area of gland nut and allow a minimum of 1/2-hour drying time before applying sealant.
(48)
Apply sealant fillet.
(a)
Apply bead of sealant around shock outer cylinder and gland nut with sealant gun.
(b) 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(67)
