Main Gear Wheel Brake Installation 5C5
32-41-41 Page 402 Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 20/93
511 Main Gear Wheel Brake Installation
Feb 20/93 Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-41-41 Page 403
G. Remove wheel and tire assembly (Ref 32-45-11 R/I).
H. Install axle thread protector and axle protection sleeve.
I. Remove brake and if in poor condition, remove gasket from axle mounting flange.
NOTE: If a metal gasket is installed, the brake-mounting studs will have to be removed. Pressing or light tapping of studs may be used if necessary.
J. Visually inspect brake attachment flange for evidence of cracks. Cracks, if present, will emanate from brake mounting holes and progress inward (toward axle) or toward outer periphery of flange. No more than four holes may have outward oriented cracks.
K. Visually inspect lower quadrant of main gear axle between brake mounting flanges for evidence of cracks. If cracks are found, main gear shock strut must be replaced (Ref 32-11-21 R/I).
3. Prepare to Install Brake
A. Ensure that inner or pressure port portion of disconnect valve is installed in pressure port on top surface of brake carrier.
(1)
Screw pressure port portion of disconnect valve into boss in brake housing until flange on disconnect contacts face of boss.
(2)
Turn flange counterclockwise to align bolt holes.
511
32-41-41 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/99
B. If it is necessary to replace the brake mounting gasket, do the following steps:
NOTE: For airplanes having the phenolic gasket configuration, it is recommended that the metallic gasket configuration be installed per SB 32-1253.
(1)
For airplanes with a phenolic gasket, clean the faying surfaces and put the gasket through the studs against the brake flange.
NOTE: You can use BAC5010 (Type 94) adhesive to hold the gasket to the brake flange. Apply the adhesive on 3 to 5 places between the holes.
(2)
For airplanes with a metal gasket, replace the gasket as follows:
(a)
Clean the faying surfaces and put the gasket against the brake flange.
(b)
Install the two shear studs through the gasket and into the brake flange holes at the 3 o'clock and 9 o'clock positions (12 o'clock position is straight up with the gear down and locked).
(c)
Install the studs as follows: 1) Apply a layer of BMS 5-95 sealant on the part of the stud shanks not threaded. 2) Push the studs into the holes on the brake flange.
NOTE: A temperature differential fit (refer to BAC5435) can be used to make the installation easier and/or prevent damage to the studs.
3) Coat threads of the studs with thread lubricant EASE-OFF 990 or equivalent.
4) Install washers and nuts.
5) Tighten the nuts with a dial or a needle type torque wrench to find the run-on
torque. 6) Tighten the nuts to a torque of 200 to 300 inch-pounds plus the run-on torque but do not tighten more than 700 inch-pounds (total torque).
C. Check for evidence of heat damage on axle brake flanges. If heat damage is observed, repair main gear axle per 32-11-111.
4. Install Main Gear Wheel Brake
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