(2)
Aeroshell #5 (alternate)
D. Axle Nut Socket - F80168-1, F80168-2, or F80168-3
E. Gear Ground Lock Assembly (Ref 32-00-01)
F. Axle thread protection - 0.013 inch x 1.00 inch stainless steel shim stock 12 inches long
G. Deleted
3. Remove Nose Gear Wheel
A. Check that gear ground lock assembly is installed in nose gear (Ref 32-00-01).
B. Jack airplane nose until wheel clears (Ref Chapter 7, Jacking Airplane).
WARNING: REMOVE AND INSTALL THE NOSE WHEEL AND TIRE ASSEMBLIES ONE AT A TIME IF YOU NEED TO REPLACE EACH OF THE TWO ASSEMBLIES. THIS IS TO PREVENT INJURY TO PERSONS OR DAMAGE TO EQUIPMENT IF THE AIRPLANE ACCIDENTLY FALLS OFF OF THE JACK.
C. Deflate tire (Ref 32-45-0 MP).
WARNING: FAILURE TO DEFLATE TIRE COULD RESULT IN INJURY IF A DEFECTIVE TIRE/WHEEL SHOULD EXPLODE.
(1) If tire cannot be deflated, back off valve stem slowly while applying a slight pressure on the valve stem during removal.
WARNING: EXCESSIVE TWISTING FORCE CAN CAUSE SEPARATION OF VALVE CORE PARTS. STAY OUT OF VALVE PATH DURING REMOVAL OR INJURY MAY RESULT.
D. Remove axle nut lockbolts and axle nut (Fig. 401).
E. Remove wheel bearing washer, retaining ring, and grease seal.
F. Tape axle thread protection over axle threads.
G. Position wheel change dolly, raise wheel and remove.
H. Remove outer bearing.
I. Remove inner bearing, grease seal, retaining ring, and spacer.
4. Prepare for Installation
A. Check wheel, axle, inner and outer bearing, grease seal, spacer and general condition of tire. Lubricate bearings, seals, and threads with grease.
503
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-45-21 Page 401
B. If axle nut threads have nicks, burrs, or deformed threads, do a dimensional check on the axle and the axle nut (Ref 32-21-71 I/C).
5. Install Nose Wheel
A. Install spacer on axle and install three cotter pins to hold spacer.
B. Install inner bearing, grease seal, and retaining ring in inboard side of wheel.
NOTE: Check that inner bearing is installed on the wheel side opposite inflation valve. Check that tab of grease seal fits indentation of cutout in wheel housing.
C. Position wheel assembly on dolly and slide into position on axle.
D. Remove axle thread protection.
E. Install outer bearing, grease seal, and retaining ring in outboard side of wheel.
NOTE: Check that tab of grease seal fits indentation in cutout in wheel housing.
F. Install wheel bearing washer with key of washer inserted in keyway of axle.
G. Lubricate threads and install axle nut.
(1)
While rotating wheel, tighten nut to 90 pound-feet.
(2)
Back axle nut off until nut is just loose (zero torque).
(3)
While again rotating wheel, retighten axle nut 20 to 40 pound-feet in one continuous rotation, and at the same time, align two of the lockbolt holes in the flange of the nut with two of the four lockbolt holes in the wheel bearing washer.
H. Install the two axle nut lockbolts (Fig. 401).
I. Install lockwire between the two axle nut lockbolt heads.
J. Inflate tire (Ref Chapter 12, Landing Gear Tire Servicing and 32-45-0 MP).
K. Lower nose gear and remove jack (Ref Chapter 7, Jacking Airplane).
503
32-45-21 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/90
500 Nose Gear Wheel Installation
May 15/68 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-45-21 Page 403
NOSE GEAR WHEEL SNUBBER- MAINTENANCE PRACTICES
1. General (Fig. 201)
A. A nose gear wheel snubber is provided for each nose wheel tire. The two units are installed at the top panel assembly of the forward nose wheel well.
B. This procedure provides instructions for removal/installation of snubber brake shoe and inspection for wear.
WARNING: THE NOSE WHEEL SNUBBERS CONTAINING ASBESTOS FIBERS OR DUST MAY BE HARMFUL IF INHALED. A PROTECTIVE TYPE RESPIRATOR SHOULD BE WORN BY PERSONNEL WHEN HANDLING OR WHEN EXPOSED TO ACTIVITIES CAPABLE OF GENERATING SUCH AIRBORNE FIBERS OR DUST.
2. Nose Gear Wheel Snubber Brake Shoe Removal/Installation (Fig. 202)
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：737 AMM 飛機(jī)維護(hù)手冊(cè) 起落架 LANDING GEAR(167)
